[ { "id": "authors:asgne-k4106", "collection": "authors", "collection_id": "asgne-k4106", "cite_using_url": "https://authors.library.caltech.edu/records/asgne-k4106", "type": "article", "title": "Calibration and performance of germanium high voltage detectors for SuperCDMS SNOLAB", "author": [ { "family_name": "Albakry", "given_name": "M.F." }, { "family_name": "Alkhatib", "given_name": "I." }, { "family_name": "Alonso-Gonz\u00e1lez", "given_name": "D.", "orcid": "0000-0002-7572-9184" }, { "family_name": "Anczarski", "given_name": "J." }, { "family_name": "Aralis", "given_name": "T." }, { "family_name": "Aramaki", "given_name": "T." }, { "family_name": "Esfahani", "given_name": "A. Ashtari", "orcid": "0000-0003-4295-9570" }, { "family_name": "Langroudy", "given_name": "I. Ataee" }, { "family_name": "Bhattacharyya", "given_name": "R." }, { "family_name": "Biffl", "given_name": "A.J." }, { "family_name": "Brink", "given_name": "P.L." }, { "family_name": "Buchanan", "given_name": "M.", "orcid": "0009-0007-1423-5985" }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calkins", "given_name": "R." }, { "family_name": "Cameron", "given_name": "R.A." }, { "family_name": "Camus", "given_name": "P." }, { "family_name": "Cartaro", "given_name": "C." }, { "family_name": "Cerde\u00f1o", "given_name": "D.G.", "orcid": "0000-0002-7649-1956" }, { "family_name": "Chang", "given_name": "Y.-Y." }, { "family_name": "Chaudhuri", "given_name": "M." }, { "family_name": "Chen", "given_name": "J.-H." }, { "family_name": "Chen", "given_name": "R." }, { "family_name": "Cooley", "given_name": "J.", "orcid": "0000-0001-6761-2042" }, { "family_name": "Corbett", "given_name": "J." }, { "family_name": "Cushman", "given_name": "P." }, { "family_name": "Cyna", "given_name": "R.", "orcid": "0000-0002-6632-3043" }, { "family_name": "Das", "given_name": "S." }, { "family_name": "Dering", "given_name": "K." }, { "family_name": "Dharani", "given_name": "S." }, { "family_name": "Vacri", "given_name": "M.L. di" }, { "family_name": "Diamond", "given_name": "M.D.", "orcid": "0009-0001-7614-1497" }, { "family_name": "Elwan", "given_name": "M.", "orcid": "0009-0002-0034-0147" }, { "family_name": "Fallows", "given_name": "S.", "orcid": "0000-0002-7200-3628" }, { "family_name": "Fascione", "given_name": "E.", "orcid": "0009-0007-6296-0313" }, { "family_name": "Figueroa-Feliciano", "given_name": "E." }, { "family_name": "Franzen", "given_name": "S.L." }, { "family_name": "Gerbier", "given_name": "G." }, { "family_name": "Germond", "given_name": "R." }, { "family_name": "Gevorgian", "given_name": "A." }, { "family_name": "Ghaith", "given_name": "M.", "orcid": "0000-0003-3304-4803" }, { "family_name": "Godden", "given_name": "G." }, { "family_name": "Golwala", "given_name": "S.R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Gonzalez", "given_name": "G.", "orcid": "0009-0007-9762-8206" }, { "family_name": "Hall", "given_name": "J." }, { "family_name": "Harms", "given_name": "C.A.S." }, { "family_name": "Hays", "given_name": "C." }, { "family_name": "Hines", "given_name": "B.A." }, { "family_name": "Hong", "given_name": "Z." }, { "family_name": "Hsu", "given_name": "L.", "orcid": "0000-0002-5591-6433" }, { "family_name": "Huber", "given_name": "M.E.", "orcid": "0000-0002-7638-902X" }, { "family_name": "Iyer", "given_name": "V." }, { "family_name": "Jha", "given_name": "M.", "orcid": "0009-0005-0024-2303" }, { "family_name": "Kashyap", "given_name": "V.K.S." }, { "family_name": "Kelsey", "given_name": "M.H.", "orcid": "0000-0001-5859-3273" }, { "family_name": "Kennard", "given_name": "K.T." }, { "family_name": "Kromer", "given_name": "Z." }, { "family_name": "Kubik", "given_name": "A." }, { "family_name": "Kurinsky", "given_name": "N.A." }, { "family_name": "Leyva", "given_name": "J." }, { "family_name": "Liu", "given_name": "J." }, { "family_name": "Liu", "given_name": "Y.", "orcid": "0000-0002-6465-1924" }, { "family_name": "Asamar", "given_name": "E. Lopez" }, { "family_name": "Lukens", "given_name": "P." }, { "family_name": "No\u00e9", "given_name": "R. L\u00f3pez" }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Mammo", "given_name": "J.S.", "orcid": "0000-0002-3293-783X" }, { "family_name": "Mayer", "given_name": "A.", "orcid": "0000-0002-9142-9720" }, { "family_name": "McNamara", "given_name": "P.C." }, { "family_name": "Michaud", "given_name": "\u00c9." }, { "family_name": "Michielin", "given_name": "E." }, { "family_name": "Mickelson", "given_name": "K.", "orcid": "0000-0001-5406-8367" }, { "family_name": "Mirabolfathi", "given_name": "N." }, { "family_name": "Mirzakhani", "given_name": "M.", "orcid": "0009-0001-1407-6247" }, { "family_name": "Mohanty", "given_name": "B.", "orcid": "0000-0001-9610-2914" }, { "family_name": "Mondal", "given_name": "D.", "orcid": "0009-0007-1583-1885" }, { "family_name": "Monteiro", "given_name": "D." }, { "family_name": "Nagorny", "given_name": "S.", "orcid": "0000-0002-8679-3747" }, { "family_name": "Nelson", "given_name": "J." }, { "family_name": "Neog", "given_name": "H." }, { "family_name": "Nguyen", "given_name": "H.", "orcid": "0009-0003-0674-7869" }, { "family_name": "Orrell", "given_name": "J.L." }, { "family_name": "Osborne", "given_name": "M.D." }, { "family_name": "Oser", "given_name": "S.M." }, { "family_name": "Pakarha", "given_name": "P." }, { "family_name": "Pandey", "given_name": "L." }, { "family_name": "Pandey", "given_name": "S.", "orcid": "0000-0003-0440-6019" }, { "family_name": "Partridge", "given_name": "R.", "orcid": "0000-0002-0806-2308" }, { "family_name": "Patel", "given_name": "P.K." }, { "family_name": "Pedreros", "given_name": "D.S.", "orcid": "0009-0001-8607-1226" }, { "family_name": "Peng", "given_name": "W." }, { "family_name": "Penner", "given_name": "M.A." }, { "family_name": "Perry", "given_name": "W.L.", "orcid": "0009-0003-4587-2048" }, { "family_name": "Podviianiuk", "given_name": "R." }, { "family_name": "Potts", "given_name": "M.", "orcid": "0000-0002-1255-4735" }, { "family_name": "Poudel", "given_name": "S.S." }, { "family_name": "Pradeep", "given_name": "A.", "orcid": "0000-0001-8014-9953" }, { "family_name": "Pyle", "given_name": "M." }, { "family_name": "Rau", "given_name": "W.", "orcid": "0000-0001-9968-5190" }, { "family_name": "Rehberg", "given_name": "A." }, { "family_name": "Reynolds", "given_name": "T." }, { "family_name": "Rios", "given_name": "M." }, { "family_name": "Roberts", "given_name": "A.", "orcid": "0000-0001-8538-9155" }, { "family_name": "Robinson", "given_name": "A.E." }, { "family_name": "Rio", "given_name": "L. Rosado Del", "orcid": "0000-0002-0157-137X" }, { "family_name": "Ryan", "given_name": "J.L.", "orcid": "0000-0001-6662-5925" }, { "family_name": "Saab", "given_name": "T.", "orcid": "0000-0003-4463-6011" }, { "family_name": "Sadek", "given_name": "D.", "orcid": "0009-0008-5323-7067" }, { "family_name": "Sadoulet", "given_name": "B.", "orcid": "0000-0002-3946-0886" }, { "family_name": "Salehi", "given_name": "S.", "orcid": "0009-0008-8276-1765" }, { "family_name": "Sander", "given_name": "J.", "orcid": "0000-0002-2847-6460" }, { "family_name": "Sattari", "given_name": "A." }, { "family_name": "Schnee", "given_name": "R.W." }, { "family_name": "Scorza", "given_name": "S." }, { "family_name": "Serfass", "given_name": "B." }, { "family_name": "Shenoy", "given_name": "R.S.", "orcid": "0000-0001-8738-0218", "clpid": "Shenoy-Rohan-S" }, { "family_name": "Simchony", "given_name": "A." }, { "family_name": "Sinervo", "given_name": "P.", "orcid": "0000-0002-5128-2373" }, { "family_name": "Smith", "given_name": "Z.J." }, { "family_name": "Soni", "given_name": "R." }, { "family_name": "Stifter", "given_name": "K." }, { "family_name": "Stukel", "given_name": "M.", "orcid": "0000-0002-9052-7513" }, { "family_name": "Sun", "given_name": "H." }, { "family_name": "Tanner", "given_name": "E." }, { "family_name": "Tenpas", "given_name": "N." }, { "family_name": "Toback", "given_name": "D.", "orcid": "0000-0003-3457-4144" }, { "family_name": "Underwood", "given_name": "R." }, { "family_name": "Villano", "given_name": "A.N.", "orcid": "0000-0002-3893-7259" }, { "family_name": "Viol", "given_name": "J." }, { "family_name": "Wen", "given_name": "O.", "clpid": "Wen-O" }, { "family_name": "Williams", "given_name": "Z.", "orcid": "0000-0002-8803-9094" }, { "family_name": "Wilson", "given_name": "M.J.", "orcid": "0000-0002-6723-3795" }, { "family_name": "Winchell", "given_name": "J." }, { "family_name": "Xiong", "given_name": "J.", "orcid": "0000-0002-4853-7558", "clpid": "Xiong-Junwen" }, { "family_name": "Yellin", "given_name": "S." }, { "family_name": "Young", "given_name": "B.A." }, { "family_name": "Zatschler", "given_name": "B.", "orcid": "0000-0001-9890-497X" }, { "family_name": "Zatschler", "given_name": "S.", "orcid": "0000-0001-8872-5628" }, { "family_name": "Zaytsev", "given_name": "A." }, { "family_name": "Zhang", "given_name": "E." }, { "family_name": "Zheng", "given_name": "J.", "orcid": "0009-0001-2157-3866" }, { "family_name": "Zheng", "given_name": "L.", "orcid": "0009-0007-9869-3106" }, { "family_name": "Zuniga", "given_name": "A." }, { "family_name": "Zurowski", "given_name": "M.J." } ], "abstract": "

As SuperCDMS SNOLAB is getting ready to search for low mass dark matter particles, using cryogenic Ge and Si detectors, a set of six of the new SuperCDMS High Voltage (HV) detectors (four Ge and two Si) were tested in the Cryogenic Underground TEst facility (CUTE) at SNOLAB. This provided the first opportunity to gain experience with this new detector type and assess their performance thoroughly under low background conditions. Here we describe the SuperCDMS HV detector concept and discuss some of the newly developed analysis methods and approaches. Focusing on the Ge detectors, we investigate the detector performance under voltage bias (up to 90 V), exercise the low energy (keV to sub-keV range) calibration based on the electron capture peaks generated by the decay of 71Ge, assess the detector resolution, and demonstrate the unexpected (and encouraging) ability of these detectors to also measure high energy interactions in the hundreds of keV range with good resolution (better than 3% at 356 keV).

", "doi": "10.1016/j.astropartphys.2026.103293", "issn": "0927-6505", "publisher": "Elsevier", "publication": "Astroparticle Physics", "publication_date": "2027-01", "volume": "184", "pages": "103293" }, { "id": "authors:20ysf-k8a29", "collection": "authors", "collection_id": "20ysf-k8a29", "cite_using_url": "https://authors.library.caltech.edu/records/20ysf-k8a29", "type": "article", "title": "Development Status of the KIPM Detector Consortium", "author": [ { "family_name": "Temples", "given_name": "Dylan J", "orcid": "0000-0001-6017-254X" }, { "family_name": "Smith", "given_name": "Zo\u00eb J." }, { "family_name": "Dang", "given_name": "Selby Q" }, { "family_name": "Aralis", "given_name": "Taylor" }, { "family_name": "Cap", "given_name": "Chi", "clpid": "Cap-Chi" }, { "family_name": "Chang", "given_name": "Clarence" }, { "family_name": "Chang", "given_name": "Yen-Yung" }, { "family_name": "Garcia-Sciveres", "given_name": "Maurice", "orcid": "0000-0002-5800-4210" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Ho", "given_name": "William" }, { "family_name": "Kurinsky", "given_name": "Noah" }, { "family_name": "Li", "given_name": "Kungang" }, { "family_name": "Li", "given_name": "Xinran" }, { "family_name": "Lisovenko", "given_name": "Marharyta" }, { "family_name": "Panner", "given_name": "Elizabeth" }, { "family_name": "Ramanathan", "given_name": "Karthik", "orcid": "0000-0003-4215-7834" }, { "family_name": "Ray", "given_name": "Shilin", "clpid": "Ray-Shilin" }, { "family_name": "Sandoval", "given_name": "Brandon", "clpid": "Sandoval-Brandon" }, { "family_name": "Suzuki", "given_name": "Aritoki" }, { "family_name": "Wang", "given_name": "Gensheng" }, { "family_name": "Wen", "given_name": "Osmond", "orcid": "0000-0002-6334-6813" }, { "family_name": "Williams", "given_name": "Michael" }, { "family_name": "Xiong", "given_name": "Junwen Robin", "clpid": "Xiong-Junwen-Robin" }, { "family_name": "Yefremenko", "given_name": "Volodymyr" } ], "abstract": "

A Kinetic Inductance Phonon-Mediated Detector is a calorimeter that uses kinetic inductance detectors (KIDs) to read out phonon signals from the device substrate. We have established a consortium comprising university and national lab groups dedicated to advancing the state of the art in these detectors, with the ultimate goal of designing a detector with sub-eV threshold on energy deposited in the substrate, enabling searches for both light dark matter and low-energy neutrino interactions. This consortium brings together experts in kinetic inductance detector design, phonon and quasiparticle dynamics, and noise modeling, along with specialized fabrication facilities, test platforms, and unique calibration capabilities. Recently, our consortium has demonstrated a resolution on energy absorbed by the sensor of 2.1 eV, the current record for phonon-sensitive KIDs, though due to ∼ 1% phonon collection efficiency, the overall detector resolution was limited to 320eV. The current focus of the consortium is modeling and improving the phonon collection efficiency and implementing low-Tc superconductors, both of which serve to improve the overall energy resolution and threshold of the detectors. FNAL Report Number: FERMILAB-PUB-25-0652-ETD

", "doi": "10.1109/tasc.2026.3680780", "issn": "1051-8223", "publisher": "IEEE", "publication": "IEEE Transactions on Applied Superconductivity", "publication_date": "2026-09", "series_number": "6", "volume": "36", "issue": "6", "pages": "1-9" }, { "id": "authors:0anxs-8tr78", "collection": "authors", "collection_id": "0anxs-8tr78", "cite_using_url": "https://authors.library.caltech.edu/records/0anxs-8tr78", "type": "article", "title": "Multi-channel, multi-template event reconstruction for SuperCDMS data using machine learning", "author": [ { "family_name": "Albakry", "given_name": "M.F.", "orcid": "0009-0006-9678-4090" }, { "family_name": "Alkhatib", "given_name": "I." }, { "family_name": "Alonso-Gonz\u00e1lez", "given_name": "D.", "orcid": "0000-0002-7572-9184" }, { "family_name": "Anczarski", "given_name": "J." }, { "family_name": "Aralis", "given_name": "T." }, { "family_name": "Aramaki", "given_name": "T.", "orcid": "0000-0002-5104-4682" }, { "family_name": "Langroudy", "given_name": "I. Ataee" }, { "family_name": "Bathurst", "given_name": "C." }, { "family_name": "Bhattacharyya", "given_name": "R." }, { "family_name": "Biffl", "given_name": "A.J." }, { "family_name": "Brink", "given_name": "P.L." }, { "family_name": "Buchanan", "given_name": "M.", "orcid": "0009-0007-1423-5985" }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calkins", "given_name": "R." }, { "family_name": "Cameron", "given_name": "R.A." }, { "family_name": "Cartaro", "given_name": "C.", "orcid": "0000-0003-1351-2630" }, { "family_name": "Cerde\u00f1o", "given_name": "D.G." }, { "family_name": "Chang", "given_name": "Y.-Y." }, { "family_name": "Chaudhuri", "given_name": "M." }, { "family_name": "Chen", "given_name": "J.-H.", "orcid": "0009-0006-5865-4973" }, { "family_name": "Chen", "given_name": "R." }, { "family_name": "Chott", "given_name": "N." }, { "family_name": "Cooley", "given_name": "J.", "orcid": "0000-0001-6761-2042" }, { "family_name": "Coombes", "given_name": "H." }, { "family_name": "Cushman", "given_name": "P.", "orcid": "0000-0002-4950-9807" }, { "family_name": "Cyna", "given_name": "R.", "orcid": "0000-0002-6632-3043" }, { "family_name": "Das", "given_name": "S.", "orcid": "0000-0003-0181-2863" }, { "family_name": "Dharani", "given_name": "S." }, { "family_name": "di Vacri", "given_name": "M.L." }, { "family_name": "Diamond", "given_name": "M.D.", "orcid": "0009-0001-7614-1497" }, { "family_name": "Elwan", "given_name": "M.", "orcid": "0009-0002-0034-0147" }, { "family_name": "Fallows", "given_name": "S.", "orcid": "0000-0002-7200-3628" }, { "family_name": "Fascione", "given_name": "E." }, { "family_name": "Figueroa-Feliciano", "given_name": "E.", "orcid": "0000-0001-9285-5556" }, { "family_name": "Franzen", "given_name": "S.L." }, { "family_name": "Gevorgian", "given_name": "A." }, { "family_name": "Ghaith", "given_name": "M.", "orcid": "0000-0003-3304-4803" }, { "family_name": "Godden", "given_name": "G.", "orcid": "0009-0004-7100-0072" }, { "family_name": "Golatkar", "given_name": "J." }, { "family_name": "Golwala", "given_name": "S.R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Gualtieri", "given_name": "R." }, { "family_name": "Hall", "given_name": "J." }, { "family_name": "Harms", "given_name": "S.A.S.", "orcid": "0009-0001-1530-7270" }, { "family_name": "Hays", "given_name": "C." }, { "family_name": "Hines", "given_name": "B.A.", "orcid": "0000-0003-2949-5177" }, { "family_name": "Hong", "given_name": "Z.", "orcid": "0000-0001-8762-4921" }, { "family_name": "Hsu", "given_name": "L.", "orcid": "0000-0002-5591-6433" }, { "family_name": "Huber", "given_name": "M.E.", "orcid": "0000-0002-7638-902X" }, { "family_name": "Iyer", "given_name": "V.", "orcid": "0000-0002-7583-7329" }, { "family_name": "Kashyap", "given_name": "V.K.S." }, { "family_name": "Keller", "given_name": "S.T.D." }, { "family_name": "Kelsey", "given_name": "M.H." }, { "family_name": "Kennard", "given_name": "K.T.", "orcid": "0009-0003-2394-2666" }, { "family_name": "Kromer", "given_name": "Z." }, { "family_name": "Kubik", "given_name": "A.", "orcid": "0000-0001-9007-422X" }, { "family_name": "Kurinsky", "given_name": "N.A.", "orcid": "0000-0002-5872-519X" }, { "family_name": "Lee", "given_name": "M." }, { "family_name": "Leyva", "given_name": "J." }, { "family_name": "Lichtenberg", "given_name": "B." }, { "family_name": "Liu", "given_name": "J." }, { "family_name": "Liu", "given_name": "Y." }, { "family_name": "Asamar", "given_name": "E. Lopez" }, { "family_name": "Lukens", "given_name": "P." }, { "family_name": "No\u00e9", "given_name": "R. L\u00f3pez" }, { "family_name": "MacFarlane", "given_name": "D.B.", "orcid": "0000-0003-0193-4414" }, { "family_name": "Mahapatra", "given_name": "R.", "orcid": "0000-0003-0286-1114" }, { "family_name": "Mammo", "given_name": "J.S." }, { "family_name": "Mayer", "given_name": "A.J." }, { "family_name": "McNamara", "given_name": "P.C.", "orcid": "0000-0002-0676-324X" }, { "family_name": "Michaud", "given_name": "\u00c9." }, { "family_name": "Michielin", "given_name": "E.", "orcid": "0000-0001-5751-8116" }, { "family_name": "Mickelson", "given_name": "K.", "orcid": "0000-0001-5406-8367" }, { "family_name": "Mirabolfathi", "given_name": "N.", "orcid": "0000-0002-7231-8910" }, { "family_name": "Mirzakhani", "given_name": "M." }, { "family_name": "Mohanty", "given_name": "B.", "orcid": "0000-0001-9610-2914" }, { "family_name": "Mondal", "given_name": "D." }, { "family_name": "Monteiro", "given_name": "D.", "orcid": "0009-0004-8643-851X" }, { "family_name": "Nelson", "given_name": "J." }, { "family_name": "Neog", "given_name": "H." }, { "family_name": "Orrell", "given_name": "J.L." }, { "family_name": "Osborne", "given_name": "M.D." }, { "family_name": "Oser", "given_name": "S.M.", "orcid": "0000-0002-9431-1859" }, { "family_name": "Pandey", "given_name": "L." }, { "family_name": "Pandey", "given_name": "S.", "orcid": "0000-0003-0440-6019" }, { "family_name": "Partridge", "given_name": "R." }, { "family_name": "Patel", "given_name": "P.K." }, { "family_name": "Pedreros", "given_name": "D.S.", "orcid": "0009-0001-8607-1226" }, { "family_name": "Peng", "given_name": "W." }, { "family_name": "Perry", "given_name": "W.L." }, { "family_name": "Podviianiuk", "given_name": "R.", "orcid": "0000-0001-9753-7952" }, { "family_name": "Potts", "given_name": "M.", "orcid": "0000-0002-1255-4735" }, { "family_name": "Poudel", "given_name": "S.S." }, { "family_name": "Pradeep", "given_name": "A.", "orcid": "0000-0001-8014-9953" }, { "family_name": "Pyle", "given_name": "M." }, { "family_name": "Rau", "given_name": "W.", "orcid": "0000-0001-9968-5190" }, { "family_name": "Reynolds", "given_name": "T.", "orcid": "0009-0004-0338-7789" }, { "family_name": "Rios", "given_name": "M." }, { "family_name": "Roberts", "given_name": "A.", "orcid": "0000-0001-8538-9155" }, { "family_name": "Robinson", "given_name": "A.E." }, { "family_name": "Rosado", "given_name": "L." }, { "family_name": "Ryan", "given_name": "J.L.", "orcid": "0000-0001-6662-5925" }, { "family_name": "Saab", "given_name": "T.", "orcid": "0000-0003-4463-6011" }, { "family_name": "Sadek", "given_name": "D.", "orcid": "0009-0008-5323-7067" }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Sahoo", "given_name": "S.P.", "orcid": "0009-0000-0982-4565" }, { "family_name": "Saikia", "given_name": "I." }, { "family_name": "Salehi", "given_name": "S.", "orcid": "0009-0008-8276-1765" }, { "family_name": "Sander", "given_name": "J.", "orcid": "0000-0002-2847-6460" }, { "family_name": "Sandoval", "given_name": "B.", "clpid": "Sandoval-B" }, { "family_name": "Sattari", "given_name": "A.", "orcid": "0009-0006-8974-5827" }, { "family_name": "Schnee", "given_name": "R.W." }, { "family_name": "Serfass", "given_name": "B.", "orcid": "0000-0003-4681-4109" }, { "family_name": "Sharbaugh", "given_name": "A.E." }, { "family_name": "Shenoy", "given_name": "R.S.", "orcid": "0000-0001-8738-0218", "clpid": "Shenoy-Rohan-S" }, { "family_name": "Simchony", "given_name": "A." }, { "family_name": "Sinervo", "given_name": "P.", "orcid": "0000-0002-5128-2373" }, { "family_name": "Smith", "given_name": "Z.J." }, { "family_name": "Soni", "given_name": "R.", "orcid": "0009-0009-2621-6671" }, { "family_name": "Stifter", "given_name": "K.", "orcid": "0000-0002-0263-175X" }, { "family_name": "Street", "given_name": "J." }, { "family_name": "Stukel", "given_name": "M.", "orcid": "0000-0002-9052-7513" }, { "family_name": "Sun", "given_name": "H." }, { "family_name": "Tanner", "given_name": "E." }, { "family_name": "Tenpas", "given_name": "N.", "orcid": "0009-0005-1185-4313" }, { "family_name": "Toback", "given_name": "D." }, { "family_name": "Villano", "given_name": "A.N.", "orcid": "0000-0002-3893-7259" }, { "family_name": "Viol", "given_name": "J.", "orcid": "0009-0006-9572-4184" }, { "family_name": "von Krosigk", "given_name": "B." }, { "family_name": "Wen", "given_name": "O.", "clpid": "Wen-O" }, { "family_name": "Williams", "given_name": "Z.", "orcid": "0000-0002-8803-9094" }, { "family_name": "Wilson", "given_name": "M.J.", "orcid": "0000-0002-6723-3795" }, { "family_name": "Winchell", "given_name": "J.", "orcid": "0000-0001-5122-3034" }, { "family_name": "Yellin", "given_name": "S.", "orcid": "0000-0003-4001-6800" }, { "family_name": "Young", "given_name": "B.A.", "orcid": "0000-0003-4106-9488" }, { "family_name": "Zatschler", "given_name": "B.", "orcid": "0000-0001-9890-497X" }, { "family_name": "Zatschler", "given_name": "S.", "orcid": "0000-0001-8872-5628" }, { "family_name": "Zaytsev", "given_name": "A." }, { "family_name": "Zhang", "given_name": "E." }, { "family_name": "Zheng", "given_name": "L.", "orcid": "0009-0007-9869-3106" }, { "family_name": "Zuniga", "given_name": "A." }, { "family_name": "Zurowski", "given_name": "M.J.", "orcid": "0000-0003-2839-2838" } ], "abstract": "

SuperCDMS SNOLAB uses kilogram-scale germanium and silicon detectors to search for dark matter. Each detector has Transition Edge Sensors (TESs) patterned on the top and bottom faces of a large crystal substrate, with the TESs electrically grouped into six phonon readout channels per face. Noise correlations are expected among a detector's readout channels, in part because the channels and their readout electronics are located in close proximity to one another. Moreover, owing to the large size of the detectors, energy deposits can produce vastly different phonon propagation patterns depending on their location in the substrate, resulting in a strong position dependence in the readout-channel pulse shapes. Both of these effects can degrade the energy resolution and consequently diminish the dark matter search sensitivity of the experiment if not accounted for properly. We present a new algorithm for pulse reconstruction, mathematically formulated to take into account correlated noise and pulse shape variations. This new algorithm fits N readout channels with a superposition of M pulse templates simultaneously — hence termed the N × M filter. We describe a method to derive the pulse templates using principal component analysis (PCA) and to extract energy and position information using a gradient boosted decision tree (GBDT). We show that these new N × M and GBDT analysis tools can reduce the impact from correlated noise sources while improving the reconstructed energy resolution. This improvement amounts to more than a factor of three for simulated mono-energetic events. For the \u2077¹Ge K-shell electron-capture peak recoils measured in a previous version of SuperCDMS called CDMSlite, the energy resolution is reduced to less than 50 eV, compared with the previously published value of ∼ 100 eV . These results lay the groundwork for position reconstruction in SuperCDMS with the N × M outputs.

", "doi": "10.1016/j.nima.2026.171437", "issn": "0168-9002", "publisher": "Elsevier", "publication": "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment", "publication_date": "2026-07", "volume": "1087", "pages": "171437" }, { "id": "authors:h94rp-ahr37", "collection": "authors", "collection_id": "h94rp-ahr37", "cite_using_url": "https://authors.library.caltech.edu/records/h94rp-ahr37", "type": "article", "title": "Quantum parity detectors: A qubit-based particle-detection scheme with meV thresholds for rare-event searches", "author": [ { "family_name": "Ramanathan", "given_name": "K.", "orcid": "0000-0003-4215-7834" }, { "family_name": "Sandoval", "given_name": "B. J.", "orcid": "0009-0008-7671-9472", "clpid": "Sandoval-Brandon-J" }, { "family_name": "Parker", "given_name": "J. E.", "orcid": "0009-0002-2570-8841", "clpid": "Parker-John-E" }, { "family_name": "Joshi", "given_name": "L. M." }, { "family_name": "Beyer", "given_name": "A. D.", "orcid": "0000-0002-1045-1652", "clpid": "Beyer-Andrew-D" }, { "family_name": "Echternach", "given_name": "P. M.", "clpid": "Echternach-P-M" }, { "family_name": "Rosenblum", "given_name": "S.", "orcid": "0000-0002-1984-3206" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "

The next generation of rare-event searches, such as those aimed at determining the nature of particle dark matter or measuring fundamental neutrino properties, will benefit from particle detectors with thresholds at the meV scale, 100 – 1000 × lower than currently available. Quantum parity detectors (QPDs) are a class of proposed quantum devices, extending recent work on superconducting qubit sensors, that exploit the fingerprints of single quasiparticle tunneling across a coherent weak link as their detection concept. As envisioned, phonons generated by particle interactions within a crystalline substrate cause an eventual quasiparticle cascade within a surface-patterned superconducting qubit element. This process alters the fundamental charge parity of the device in a binary manner, which can be used to deduce the initial properties of the energy deposition. This work lays out multiple resonator-coupled readout schemes depending on qubit architecture, provides an analytic formulation for reconstructing sensor energies, and details strategies for multiplexing large arrays of sensors. We further compute the sensitivity of QPDs and detail an R&D pathway to demonstrating sub-eV energy deposit thresholds.

", "doi": "10.1103/kqd2-spb1", "issn": "3070-2240", "publisher": "American Physical Society", "publication": "APS Open Science", "publication_date": "2026-05-01", "volume": "1", "pages": "000013" }, { "id": "authors:dtv8c-ydb44", "collection": "authors", "collection_id": "dtv8c-ydb44", "cite_using_url": "https://authors.library.caltech.edu/records/dtv8c-ydb44", "type": "article", "title": "Flat Silicon Gradient Index Lens With Deep Reactive-Ion-Etched Three-Layer Antireflection Structure for Millimeter and Submillimeter Wavelengths", "author": [ { "family_name": "Defrance", "given_name": "Fabien", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-Fabien" }, { "family_name": "Jung-Kubiak", "given_name": "Cecile", "orcid": "0000-0003-2745-6342", "clpid": "Jung-Kubiak-Cecile" }, { "family_name": "Gill", "given_name": "John", "clpid": "Gill-John" }, { "family_name": "Rahiminejad", "given_name": "Sofia", "orcid": "0000-0001-8094-7189", "clpid": "Rahiminejad-Sofia" }, { "family_name": "Macioce", "given_name": "Theodore", "orcid": "0000-0002-3156-6627", "clpid": "Macioce-Theodore" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-J" }, { "family_name": "Chattopadhyay", "given_name": "Goutam", "orcid": "0000-0001-7942-5025", "clpid": "Chattopadhyay-Goutam" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "

In this article, we present the design, fabrication, and characterization of a 100 mm diameter, flat, gradient-index (GRIN) lens fabricated with high-resistivity silicon, combined with a three-layer antireflection (AR) structure optimized for 160–355 GHz. Multidepth, deep reactive-ion etching enables patterning of silicon wafers with subwavelength structures (posts or holes) to locally change the effective refractive index and, thus, create AR layers and a radial index gradient. The structures are nonresonant and, for sufficiently long wavelengths, achromatic. Hexagonal holes varying in size with distance from the optical axis create a parabolic index profile decreasing from 3.15 at the center of the lens to 1.87 at the edge. The AR structure consists of square holes and cross-shaped posts. We have fabricated a lens consisting of a stack of five 525 μm thick GRIN wafers and one AR wafer on each face. We have characterized the lens over the frequency range 220–330 GHz, obtaining behavior consistent with Gaussian optics down to −14 dB and transmittance of 99±3%.

", "doi": "10.1109/TTHZ.2025.3555418", "issn": "2156-342X", "publisher": "IEEE", "publication": "IEEE Transactions on Terahertz Science and Technology", "publication_date": "2025-07", "series_number": "4", "volume": "15", "issue": "4", "pages": "679-693" }, { "id": "authors:gszcn-0xv76", "collection": "authors", "collection_id": "gszcn-0xv76", "cite_using_url": "https://authors.library.caltech.edu/records/gszcn-0xv76", "type": "article", "title": "Performance of a phonon-mediated kinetic inductance detector at the NEXUS cryogenic facility", "author": [ { "family_name": "Temples", "given_name": "Dylan J.", "orcid": "0000-0001-6017-254X" }, { "family_name": "Wen", "given_name": "Osmond", "orcid": "0000-0002-6334-6813", "clpid": "Wen-Osmond" }, { "family_name": "Ramanathan", "given_name": "Karthik", "orcid": "0000-0003-4215-7834", "clpid": "Ramanathan-Karthik" }, { "family_name": "Aralis", "given_name": "Taylor", "clpid": "Aralis-Taylor" }, { "family_name": "Chang", "given_name": "Yen-Yung", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hsu", "given_name": "Lauren", "orcid": "0000-0002-5591-6433", "clpid": "Hsu-Lauren" }, { "family_name": "Bathurst", "given_name": "Corey" }, { "family_name": "Baxter", "given_name": "Daniel", "orcid": "0000-0003-0662-3535" }, { "family_name": "Bowring", "given_name": "Daniel" }, { "family_name": "Chen", "given_name": "Ran", "orcid": "0000-0001-9669-426X" }, { "family_name": "Figueroa-Feliciano", "given_name": "Enectali" }, { "family_name": "Hollister", "given_name": "Matthew" }, { "family_name": "James", "given_name": "Christopher" }, { "family_name": "Kennard", "given_name": "Kyle", "orcid": "0009-0003-2394-2666" }, { "family_name": "Kurinsky", "given_name": "Noah" }, { "family_name": "Lewis", "given_name": "Samantha", "orcid": "0000-0002-4425-3312" }, { "family_name": "Lukens", "given_name": "Patrick" }, { "family_name": "Novati", "given_name": "Valentina" }, { "family_name": "Ren", "given_name": "Runze" }, { "family_name": "Schmidt", "given_name": "Benjamin" } ], "abstract": "

Microcalorimeters that leverage microwave kinetic inductance detectors to read out phonon signals in the particle-absorbing target, referred to as kinetic inductance phonon-mediated (KIPM) detectors, offer an attractive detector architecture to probe dark matter (DM) down to the fermionic thermal relic mass limit. A prototype KIPM detector featuring a single aluminum resonator patterned onto a 1-gram silicon substrate was operated in the Northwestern EXerimental Underground Site (NEXUS) low-background facility at Fermilab for characterization and evaluation of this detector architecture’s efficacy for a DM search. An energy calibration was performed by exposing the bare substrate to a pulsed source of 470-nm photons, resulting in a baseline resolution on the energy absorbed by the phonon sensor of 2.1±0.2 eV, a factor of two better than the current state of the art, enabled by quasiparticle lifetimes extending up to 6.5 ms. However, due to the subpercent phonon collection efficiency, the resolution on energy deposited in the substrate is limited to \ud835\udf0e\ud835\udc38=318±29 eV. We further model both the signal pulse shape as a function of device temperature to extract quasiparticle lifetimes, and the observed noise spectra.

", "doi": "10.1103/physrevapplied.22.044045", "issn": "2331-7019", "publisher": "American Physical Society", "publication": "Physical Review Applied", "publication_date": "2024-10-18", "series_number": "4", "volume": "22", "issue": "4", "pages": "044045" }, { "id": "authors:38sgn-h0k15", "collection": "authors", "collection_id": "38sgn-h0k15", "cite_using_url": "https://authors.library.caltech.edu/records/38sgn-h0k15", "type": "book_section", "title": "NEW-MUSIC: The Next-generation Extended-Wavelength MUltiband Sub/millimeter Inductance Camera", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII", "author": [ { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Beyer", "given_name": "Andrew", "orcid": "0000-0002-1045-1652", "clpid": "Beyer-Andrew" }, { "family_name": "Cunnane", "given_name": "Daniel", "orcid": "0000-0001-8039-7914", "clpid": "Cunnane-Daniel" }, { "family_name": "Day", "given_name": "Peter K.", "orcid": "0000-0002-3670-9017", "clpid": "Day-Peter-K" }, { "family_name": "Defrance", "given_name": "Fabien", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-Fabien" }, { "family_name": "Frez", "given_name": "Clifford F.", "clpid": "Frez-Clifford-F" }, { "family_name": "Huang", "given_name": "Xiaolan" }, { "family_name": "Kim", "given_name": "Junhan", "orcid": "0000-0002-4274-9373", "clpid": "Kim-Junhan" }, { "family_name": "Martin", "given_name": "Jean-Marc", "orcid": "0000-0002-9418-3420", "clpid": "Martin-Jean-Marc" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-J" }, { "family_name": "Shu", "given_name": "Shibo", "orcid": "0000-0002-6370-2101" }, { "family_name": "Yu", "given_name": "Shiling", "clpid": "Yu-Shiling" } ], "editor": [ { "family_name": "Zmuidzinas", "given_name": "Jonas" }, { "family_name": "Gao", "given_name": "Jian-Rong" } ], "abstract": "

The Next-generation Extended Wavelength-MUltiband Sub/millimeter Inductance Camera (NEW-MUSIC) on the Leighton Chajnantor Telescope (LCT) will be a first-of-its-kind, six-band, transmillimeter-wave (\"trans-mm\") polarimeter covering 2.4 octaves of spectral bandwidth to open a new window on the trans-mm time-domain frontier, in particular new frontiers in energy, density, time, and magnetic field. NEW-MUSIC's broad spectral coverage will also enable the use of the Sunyaev-Zeldovich effects to study accretion, feedback, and dust content in the hot gaseous haloes of galaxies and galaxy clusters. Six-band spectral energy distributions, with polarization information, will yield new insights into stellar and planetary nurseries. NEW-MUSIC will employ hierarchical, phased arrays of polarization-sensitive superconducting slot-dipole antennas, coupled to photolithographic bandpass filters, to nearly optimally populate LCT's 14′ field-of-view with six spectral bands over 80–420 GHz (1:5.25 spectral dynamic range; 2.4 octaves). Light will be routed to Al or AlMn microstripline-coupled, parallel-plate capacitor, lumped-element kinetic inductance detectors (MS-PPC-LEKIDs), an entirely new KID architecture that substantially enhances design flexibility while providing background-limited performance. Innovative, wide-bandwidth, etched silicon structures will be used to antireflection-treat the back-illuminated focal plane. NEW-MUSIC will cost-effectively reuse much of the MUSIC instrument, initially deploying a quarter-scale focal plane capable of the bulk of NEW-MUSIC science followed later by a full-FoV focal plane needed for NEW-MUSIC wide-area survey science.

", "doi": "10.1117/12.3021175", "isbn": "9781510675278", "publisher": "SPIE", "place_of_publication": "Bellingham, WA", "publication": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII", "publication_date": "2024-08-16", "volume": "13102", "pages": "1310202" }, { "id": "authors:5mw29-et345", "collection": "authors", "collection_id": "5mw29-et345", "cite_using_url": "https://authors.library.caltech.edu/records/5mw29-et345", "type": "article", "title": "Hierarchical Phased-Array Antennas Coupled to Al KIDs: A Scalable Architecture for Multi-band Millimeter/Submillimeter Focal Planes", "author": [ { "family_name": "Martin", "given_name": "Jean-Marc", "clpid": "Martin-Jean-Marc" }, { "family_name": "Kim", "given_name": "Junhan", "orcid": "0000-0002-4274-9373", "clpid": "Kim-Junhan" }, { "family_name": "Defrance", "given_name": "Fabien", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-Fabien" }, { "family_name": "Shu", "given_name": "Shibo", "orcid": "0000-0002-6370-2101", "clpid": "Shu-Shibo" }, { "family_name": "Beyer", "given_name": "Andrew D.", "orcid": "0000-0002-1045-1652", "clpid": "Beyer-Andrew-D" }, { "family_name": "Day", "given_name": "Peter K.", "orcid": "0000-0002-3670-9017", "clpid": "Day-Peter-K" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "

We present the optical characterization of two-scale hierarchical phased-array antenna kinetic inductance detectors (KIDs) for millimeter/submillimeter wavelengths. Our KIDs have a lumped-element architecture with parallel plate capacitors and aluminum inductors. The incoming light is received with a hierarchical phased array of slot dipole antennas, split into 4 frequency bands (between 125 GHz and 365 GHz) with on-chip lumped-element band-pass filters, and routed to different KIDs using microstriplines. Individual pixels detect light for the 3 higher-frequency bands (190–365 GHz), and the signals from four individual pixels are coherently summed to create a larger pixel detecting light for the lowest frequency band (125–175 GHz). The spectral response of the band-pass filters was measured using Fourier transform spectroscopy (FTS), the far-field beam pattern of the phased-array antennas was obtained using an infrared source mounted on a 2-axis translating stage, and the optical efficiency of the KIDs was characterized by observing loads at 294 K and 77 K. We report on the results of these three measurements.

", "doi": "10.1007/s10909-024-03110-4", "pmcid": "PMC11282143", "issn": "0022-2291", "publisher": "Springer Science and Business Media LLC", "publication": "Journal of Low Temperature Physics", "publication_date": "2024-07", "series_number": "1-2", "volume": "216", "issue": "1-2", "pages": "104-111" }, { "id": "authors:7zhx0-mvp60", "collection": "authors", "collection_id": "7zhx0-mvp60", "cite_using_url": "https://authors.library.caltech.edu/records/7zhx0-mvp60", "type": "article", "title": "ICM-SHOX. I. Methodology Overview and Discovery of a Gas\u2013Dark Matter Velocity Decoupling in the MACS J0018.5+1626 Merger", "author": [ { "family_name": "Silich", "given_name": "Emily M.", "orcid": "0000-0002-1616-5649", "clpid": "Silich-Emily-M" }, { "family_name": "Bellomi", "given_name": "Elena", "orcid": "0000-0001-6411-3686", "clpid": "Bellomi-Elena" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-J" }, { "family_name": "ZuHone", "given_name": "John", "orcid": "0000-0003-3175-2347", "clpid": "ZuHone-John" }, { "family_name": "Chadayammuri", "given_name": "Urmila", "orcid": "0000-0003-2521-506X", "clpid": "Chadayammuri-Urmila" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hughes", "given_name": "David", "clpid": "Hughes-David" }, { "family_name": "Monta\u00f1a", "given_name": "Alfredo", "orcid": "0000-0003-4229-381X", "clpid": "Monta\u00f1a-Alfredo" }, { "family_name": "Mroczkowski", "given_name": "Tony", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-Tony" }, { "family_name": "Nagai", "given_name": "Daisuke", "orcid": "0000-0002-6766-5942", "clpid": "Nagai-Daisuke" }, { "family_name": "S\u00e1nchez-Arg\u00fcelles", "given_name": "David", "orcid": "0000-0002-7344-9920", "clpid": "S\u00e1nchez-Arg\u00fcelles-David" }, { "family_name": "Stanford", "given_name": "S. A.", "orcid": "0000-0003-0122-0841", "clpid": "Stanford-Spencer-A" }, { "family_name": "Wilson", "given_name": "Grant", "orcid": "0000-0003-2705-9152", "clpid": "Wilson-Grant" }, { "family_name": "Zemcov", "given_name": "Michael", "orcid": "0000-0001-8253-1451", "clpid": "Zemcov-Michael" }, { "family_name": "Zitrin", "given_name": "Adi", "orcid": "0000-0002-0350-4488", "clpid": "Zitrin-Adi" } ], "abstract": "
\n

Galaxy cluster mergers are rich sources of information to test cluster astrophysics and cosmology. However, cluster mergers produce complex projected signals that are difficult to interpret physically from individual observational probes. Multi-probe constraints on the gas and dark matter (DM) cluster components are necessary to infer merger parameters that are otherwise degenerate. We present Improved Constraints on Mergers with SZ, Hydrodynamical simulations, Optical, and X-ray (ICM-SHOX), a systematic framework to jointly infer multiple merger parameters quantitatively via a pipeline that directly compares a novel combination of multi-probe observables to mock observables derived from hydrodynamical simulations. We report a first application of the ICM-SHOX pipeline to MACS J0018.5+1626, wherein we systematically examine simulated snapshots characterized by a wide range of initial parameters to constrain the MACS J0018.5+1626 merger geometry. We constrain the epoch of MACS J0018.5+1626 to the range 0–60 Myr post-pericenter passage, and the viewing angle is inclined ≈27°–40° from the merger axis. We obtain constraints for the impact parameter (\u2272250 kpc), mass ratio (≈1.5–3.0), and initial relative velocity when the clusters are separated by 3 Mpc (≈1700–3000 km s−1). The primary and secondary clusters initially (at 3 Mpc) have gas distributions that are moderately and strongly disturbed, respectively. We discover a velocity space decoupling of the DM and gas distributions in MACS J0018.5+1626, traced by cluster-member galaxy velocities and the kinematic Sunyaev–Zel'dovich effect, respectively. Our simulations indicate this decoupling is dependent on the different collisional properties of the two distributions for particular merger epochs, geometries, and viewing angles.

\n
", "doi": "10.3847/1538-4357/ad3fb5", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2024-06-20", "series_number": "2", "volume": "968", "issue": "2", "pages": "74" }, { "id": "authors:hkz48-qrd45", "collection": "authors", "collection_id": "hkz48-qrd45", "cite_using_url": "https://authors.library.caltech.edu/records/hkz48-qrd45", "type": "article", "title": "Characterization of the low electric field and zero-temperature two-level-system loss in hydrogenated amorphous silicon", "author": [ { "family_name": "Defrance", "given_name": "Fabien", "orcid": "0000-0002-3746-5296" }, { "family_name": "Beyer", "given_name": "Andrew D.", "orcid": "0000-0002-1045-1652" }, { "family_name": "Shu", "given_name": "Shibo" }, { "family_name": "Sayers", "given_name": "Jack" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "

Two-level systems (TLS) are an important, if not dominant, source of loss and noise for superconducting resonators such as those used in kinetic inductance detectors and some quantum information science platforms. They are similarly important for loss in photolithographically fabricated superconducting mm-wave/THz transmission lines. For both lumped-element and transmission-line structures, native amorphous surface oxide films are typically the sites of such TLS in nonmicrostripline geometries, while loss in the (usually amorphous) dielectric film itself usually dominates in microstriplines. We report here on the demonstration of low TLS loss at GHz frequencies in hydrogenated amorphous silicon (a-Si:H) films deposited by plasma-enhanced chemical vapor deposition in superconducting lumped-element resonators using parallel-plate capacitors (PPCs). The values we obtain from two recipes in different deposition machines, 7 × 10\u207b\u2076 and 12 × 10\u207b\u2076, improve on the best achieved in the literature by a factor of 2–4 for a-Si:H and are comparable to recent measurements of amorphous germanium. Moreover, we have taken care to extract the true zero-temperature, low-field loss tangent of these films, accounting for temperature and field saturation effects that can yield misleading results. Such robustly fabricated and characterized films render the use of PPCs with deposited amorphous films a viable architecture for superconducting resonators and they also promise extremely low loss and high quality factor for photolithographically fabricated superconducting mm-wave/THz transmission lines used in planar antennas and resonant filters.

", "doi": "10.1103/physrevmaterials.8.035602", "issn": "2475-9953", "publisher": "American Physical Society", "publication": "Physical Review Materials", "publication_date": "2024-03", "series_number": "3", "volume": "8", "issue": "3", "pages": "035602" }, { "id": "authors:mreqv-d2s47", "collection": "authors", "collection_id": "mreqv-d2s47", "cite_using_url": "https://authors.library.caltech.edu/records/mreqv-d2s47", "type": "article", "title": "First Measurement of the Nuclear-Recoil Ionization Yield in Silicon at 100\u00a0eV", "author": [ { "family_name": "Albakry", "given_name": "M.\u2009F." }, { "family_name": "Alkhatib", "given_name": "I." }, { "family_name": "Alonso", "given_name": "D." }, { "family_name": "Amaral", "given_name": "D.\u2009W.\u2009P." }, { "family_name": "Aralis", "given_name": "T.", "orcid": "0000-0002-3501-6948" }, { "family_name": "Aramaki", "given_name": "T." }, { "family_name": "Arnquist", "given_name": "I.\u2009J." }, { "family_name": "Ataee Langroudy", "given_name": "I." }, { "family_name": "Azadbakht", "given_name": "E." }, { "family_name": "Banik", "given_name": "S." }, { "family_name": "Bathurst", "given_name": "C." }, { "family_name": "Bhattacharyya", "given_name": "R." }, { "family_name": "Brink", "given_name": "P.\u2009L." }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calkins", "given_name": "R." }, { "family_name": "Cameron", "given_name": "R.\u2009A." }, { "family_name": "Cartaro", "given_name": "C." }, { "family_name": "Cerde\u00f1o", "given_name": "D.\u2009G." }, { "family_name": "Chang", "given_name": "Y.-Y." }, { "family_name": "Chaudhuri", "given_name": "M." }, { "family_name": "Chen", "given_name": "R." }, { "family_name": "Chott", "given_name": "N." }, { "family_name": "Cooley", "given_name": "J." }, { "family_name": "Coombes", "given_name": "H." }, { "family_name": "Corbett", "given_name": "J." }, { "family_name": "Cushman", "given_name": "P." }, { "family_name": "Das", "given_name": "S." }, { "family_name": "De Brienne", "given_name": "F." }, { "family_name": "Rios", "given_name": "M." }, { "family_name": "Dharani", "given_name": "S." }, { "family_name": "di Vacri", "given_name": "M.\u2009L." }, { "family_name": "Diamond", "given_name": "M.\u2009D." }, { "family_name": "Elwan", "given_name": "M." }, { "family_name": "Fascione", "given_name": "E." }, { "family_name": "Figueroa-Feliciano", "given_name": "E." }, { "family_name": "Fink", "given_name": "C.\u2009W." }, { "family_name": "Fouts", "given_name": "K." }, { "family_name": "Fritts", "given_name": "M." }, { "family_name": "Gerbier", "given_name": "G." }, { "family_name": "Germond", "given_name": "R." }, { "family_name": "Ghaith", "given_name": "M." }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hall", "given_name": "J." }, { "family_name": "Harms", "given_name": "S.\u2009A.\u2009S." }, { "family_name": "Hassan", "given_name": "N." }, { "family_name": "Hines", "given_name": "B.\u2009A." }, { "family_name": "Hong", "given_name": "Z." }, { "family_name": "Hoppe", "given_name": "E.\u2009W." }, { "family_name": "Hsu", "given_name": "L." }, { "family_name": "Huber", "given_name": "M.\u2009E." }, { "family_name": "Iyer", "given_name": "V." }, { "family_name": "Kashyap", "given_name": "V.\u2009K.\u2009S." }, { "family_name": "Kelsey", "given_name": "M.\u2009H." }, { "family_name": "Kubik", "given_name": "A." }, { "family_name": "Kurinsky", "given_name": "N.\u2009A." }, { "family_name": "Lee", "given_name": "M." }, { "family_name": "Litke", "given_name": "M." }, { "family_name": "Liu", "given_name": "J." }, { "family_name": "Liu", "given_name": "Y." }, { "family_name": "Loer", "given_name": "B." }, { "family_name": "Lopez Asamar", "given_name": "E." }, { "family_name": "Lukens", "given_name": "P." }, { "family_name": "MacFarlane", "given_name": "D.\u2009B." }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Mast", "given_name": "N." }, { "family_name": "Mayer", "given_name": "A.\u2009J." }, { "family_name": "Meyer zu Theenhausen", "given_name": "H." }, { "family_name": "Michaud", "given_name": "\u00c9." }, { "family_name": "Michielin", "given_name": "E." }, { "family_name": "Mirabolfathi", "given_name": "N." }, { "family_name": "Mohanty", "given_name": "B." }, { "family_name": "Nebolsky", "given_name": "B." }, { "family_name": "Nelson", "given_name": "J." }, { "family_name": "Neog", "given_name": "H." }, { "family_name": "Novati", "given_name": "V." }, { "family_name": "Orrell", "given_name": "J.\u2009L." }, { "family_name": "Osborne", "given_name": "M.\u2009D." }, { "family_name": "Oser", "given_name": "S.\u2009M." }, { "family_name": "Page", "given_name": "W.\u2009A." }, { "family_name": "Pandey", "given_name": "L." }, { "family_name": "Pandey", "given_name": "S." }, { "family_name": "Partridge", "given_name": "R." }, { "family_name": "Pedreros", "given_name": "D.\u2009S." }, { "family_name": "Perna", "given_name": "L." }, { "family_name": "Podviianiuk", "given_name": "R." }, { "family_name": "Ponce", "given_name": "F." }, { "family_name": "Poudel", "given_name": "S." }, { "family_name": "Pradeep", "given_name": "A." }, { "family_name": "Pyle", "given_name": "M." }, { "family_name": "Rau", "given_name": "W." }, { "family_name": "Reid", "given_name": "E." }, { "family_name": "Ren", "given_name": "R.", "orcid": "0000-0002-4804-4825" }, { "family_name": "Reynolds", "given_name": "T." }, { "family_name": "Tanner", "given_name": "E." }, { "family_name": "Roberts", "given_name": "A." }, { "family_name": "Robinson", "given_name": "A.\u2009E." }, { "family_name": "Saab", "given_name": "T." }, { "family_name": "Sadek", "given_name": "D." }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Sahoo", "given_name": "S.\u2009P." }, { "family_name": "Saikia", "given_name": "I." }, { "family_name": "Sander", "given_name": "J." }, { "family_name": "Sattari", "given_name": "A." }, { "family_name": "Schmidt", "given_name": "B." }, { "family_name": "Schnee", "given_name": "R.\u2009W." }, { "family_name": "Scorza", "given_name": "S." }, { "family_name": "Serfass", "given_name": "B." }, { "family_name": "Poudel", "given_name": "S.\u2009S." }, { "family_name": "Sincavage", "given_name": "D.\u2009J." }, { "family_name": "Sinervo", "given_name": "P." }, { "family_name": "Speaks", "given_name": "Z." }, { "family_name": "Street", "given_name": "J." }, { "family_name": "Sun", "given_name": "H." }, { "family_name": "Terry", "given_name": "G.\u2009D." }, { "family_name": "Thasrawala", "given_name": "F.\u2009K." }, { "family_name": "Toback", "given_name": "D." }, { "family_name": "Underwood", "given_name": "R." }, { "family_name": "Verma", "given_name": "S." }, { "family_name": "Villano", "given_name": "A.\u2009N." }, { "family_name": "von Krosigk", "given_name": "B." }, { "family_name": "Watkins", "given_name": "S.\u2009L." }, { "family_name": "Wen", "given_name": "O.", "orcid": "0000-0002-6334-6813" }, { "family_name": "Williams", "given_name": "Z." }, { "family_name": "Wilson", "given_name": "M.\u2009J." }, { "family_name": "Winchell", "given_name": "J." }, { "family_name": "Wykoff", "given_name": "K." }, { "family_name": "Yellin", "given_name": "S." }, { "family_name": "Young", "given_name": "B.\u2009A." }, { "family_name": "Yu", "given_name": "T.\u2009C." }, { "family_name": "Zatschler", "given_name": "B." }, { "family_name": "Zatschler", "given_name": "S." }, { "family_name": "Zaytsev", "given_name": "A." }, { "family_name": "Zeolla", "given_name": "A." }, { "family_name": "Zhang", "given_name": "E." }, { "family_name": "Zheng", "given_name": "L." }, { "family_name": "Zheng", "given_name": "Y." }, { "family_name": "Zuniga", "given_name": "A." }, { "family_name": "An", "given_name": "P." }, { "family_name": "Barbeau", "given_name": "P.\u2009S." }, { "family_name": "Hedges", "given_name": "S.\u2009C." }, { "family_name": "Li", "given_name": "L." }, { "family_name": "Runge", "given_name": "J." }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "

We measured the nuclear-recoil ionization yield in silicon with a cryogenic phonon-sensitive gram-scale detector. Neutrons from a monoenergetic beam scatter off of the silicon nuclei at angles corresponding to energy depositions from 4 keV down to 100 eV, the lowest energy probed so far. The results show no sign of an ionization production threshold above 100 eV. These results call for further investigation of the ionization yield theory and a comprehensive determination of the detector response function at energies below the keV scale.

", "doi": "10.1103/PhysRevLett.131.091801", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2023-09-01", "series_number": "9", "volume": "131", "issue": "9", "pages": "091801" }, { "id": "authors:z54ka-qsh06", "collection": "authors", "collection_id": "z54ka-qsh06", "cite_using_url": "https://authors.library.caltech.edu/records/z54ka-qsh06", "type": "article", "title": "Search for low-mass dark matter via bremsstrahlung radiation and the Migdal effect in SuperCDMS", "author": [ { "family_name": "Albakry", "given_name": "M.\u2009F.", "clpid": "Albakry-M-F" }, { "family_name": "Alkhatib", "given_name": "I." }, { "family_name": "Alonso-Gonz\u00e1lez", "given_name": "D." }, { "family_name": "Amaral", "given_name": "D.\u2009W.\u2009P." }, { "family_name": "Aralis", "given_name": "T.", "orcid": "0000-0002-3501-6948", "clpid": "Aralis-Taylor-B" }, { "family_name": "Aramaki", "given_name": "T." }, { "family_name": "Arnquist", "given_name": "I.\u2009J." }, { "family_name": "Ataee Langroudy", "given_name": "I." }, { "family_name": "Azadbakht", "given_name": "E." }, { "family_name": "Banik", "given_name": "S." }, { "family_name": "Bathurst", "given_name": "C." }, { "family_name": "Bhattacharyya", "given_name": "R." }, { "family_name": "Brink", "given_name": "P.\u2009L." }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calkins", "given_name": "R.", "orcid": "0000-0002-8079-5688" }, { "family_name": "Cameron", "given_name": "R.\u2009A." }, { "family_name": "Cartaro", "given_name": "C." }, { "family_name": "Cerde\u00f1o", "given_name": "D.\u2009G." }, { "family_name": "Chang", "given_name": "Y.-Y." }, { "family_name": "Chaudhuri", "given_name": "M." }, { "family_name": "Chen", "given_name": "R." }, { "family_name": "Chott", "given_name": "N." }, { "family_name": "Cooley", "given_name": "J." }, { "family_name": "Coombes", "given_name": "H." }, { "family_name": "Corbett", "given_name": "J." }, { "family_name": "Cushman", "given_name": "P." }, { "family_name": "Das", "given_name": "S." }, { "family_name": "De Brienne", "given_name": "F." }, { "family_name": "Rios", "given_name": "M." }, { "family_name": "Dharani", "given_name": "S." }, { "family_name": "di Vacri", "given_name": "M.\u2009L." }, { "family_name": "Diamond", "given_name": "M.\u2009D." }, { "family_name": "Elwan", "given_name": "M." }, { "family_name": "Fascione", "given_name": "E." }, { "family_name": "Figueroa-Feliciano", "given_name": "E." }, { "family_name": "Fink", "given_name": "C.\u2009W." }, { "family_name": "Fouts", "given_name": "K." }, { "family_name": "Fritts", "given_name": "M." }, { "family_name": "Gerbier", "given_name": "G." }, { "family_name": "Germond", "given_name": "R." }, { "family_name": "Ghaith", "given_name": "M." }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hall", "given_name": "J." }, { "family_name": "Hassan", "given_name": "N." }, { "family_name": "Hines", "given_name": "B.\u2009A." }, { "family_name": "Hong", "given_name": "Z." }, { "family_name": "Hoppe", "given_name": "E.\u2009W." }, { "family_name": "Hsu", "given_name": "L." }, { "family_name": "Huber", "given_name": "M.\u2009E." }, { "family_name": "Iyer", "given_name": "V." }, { "family_name": "Jardin", "given_name": "D." }, { "family_name": "Kashyap", "given_name": "V.\u2009K.\u2009S." }, { "family_name": "Kelsey", "given_name": "M.\u2009H." }, { "family_name": "Kubik", "given_name": "A." }, { "family_name": "Kurinsky", "given_name": "N.\u2009A." }, { "family_name": "Lee", "given_name": "M." }, { "family_name": "Li", "given_name": "A." }, { "family_name": "Litke", "given_name": "M." }, { "family_name": "Liu", "given_name": "J." }, { "family_name": "Liu", "given_name": "Y." }, { "family_name": "Loer", "given_name": "B." }, { "family_name": "Lopez Asamar", "given_name": "E." }, { "family_name": "Lukens", "given_name": "P." }, { "family_name": "MacFarlane", "given_name": "D.\u2009B." }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Mammo", "given_name": "J.\u2009S." }, { "family_name": "Mast", "given_name": "N." }, { "family_name": "Mayer", "given_name": "A.\u2009J." }, { "family_name": "Meyer zu Theenhausen", "given_name": "H." }, { "family_name": "Michaud", "given_name": "\u00c9." }, { "family_name": "Michielin", "given_name": "E." }, { "family_name": "Mirabolfathi", "given_name": "N." }, { "family_name": "Mohanty", "given_name": "B." }, { "family_name": "Nelson", "given_name": "J." }, { "family_name": "Neog", "given_name": "H." }, { "family_name": "Novati", "given_name": "V." }, { "family_name": "Orrell", "given_name": "J.\u2009L." }, { "family_name": "Osborne", "given_name": "M.\u2009D." }, { "family_name": "Oser", "given_name": "S.\u2009M." }, { "family_name": "Page", "given_name": "W.\u2009A." }, { "family_name": "Pandey", "given_name": "L." }, { "family_name": "Pandey", "given_name": "S." }, { "family_name": "Partridge", "given_name": "R." }, { "family_name": "Pedreros", "given_name": "D.\u2009S." }, { "family_name": "Perna", "given_name": "L." }, { "family_name": "Podviianiuk", "given_name": "R." }, { "family_name": "Ponce", "given_name": "F." }, { "family_name": "Poudel", "given_name": "S." }, { "family_name": "Pradeep", "given_name": "A." }, { "family_name": "Pyle", "given_name": "M." }, { "family_name": "Rau", "given_name": "W." }, { "family_name": "Reid", "given_name": "E." }, { "family_name": "Ren", "given_name": "R." }, { "family_name": "Reynolds", "given_name": "T." }, { "family_name": "Roberts", "given_name": "A." }, { "family_name": "Robinson", "given_name": "A.\u2009E." }, { "family_name": "Saab", "given_name": "T." }, { "family_name": "Sadek", "given_name": "D." }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Saikia", "given_name": "I." }, { "family_name": "Sander", "given_name": "J." }, { "family_name": "Sattari", "given_name": "A." }, { "family_name": "Schmidt", "given_name": "B." }, { "family_name": "Schnee", "given_name": "R.\u2009W." }, { "family_name": "Scorza", "given_name": "S." }, { "family_name": "Serfass", "given_name": "B." }, { "family_name": "Poudel", "given_name": "S.\u2009S." }, { "family_name": "Sincavage", "given_name": "D.\u2009J." }, { "family_name": "Sinervo", "given_name": "P." }, { "family_name": "Street", "given_name": "J." }, { "family_name": "Sun", "given_name": "H." }, { "family_name": "Terry", "given_name": "G.\u2009D." }, { "family_name": "Thasrawala", "given_name": "F.\u2009K." }, { "family_name": "Toback", "given_name": "D." }, { "family_name": "Underwood", "given_name": "R." }, { "family_name": "Verma", "given_name": "S." }, { "family_name": "Villano", "given_name": "A.\u2009N." }, { "family_name": "von Krosigk", "given_name": "B." }, { "family_name": "Watkins", "given_name": "S.\u2009L." }, { "family_name": "Wen", "given_name": "O.", "orcid": "0000-0002-6334-6813", "clpid": "Wen-Osmond" }, { "family_name": "Williams", "given_name": "Z." }, { "family_name": "Wilson", "given_name": "M.\u2009J." }, { "family_name": "Winchell", "given_name": "J." }, { "family_name": "Wu", "given_name": "C.-P." }, { "family_name": "Wykoff", "given_name": "K." }, { "family_name": "Yellin", "given_name": "S." }, { "family_name": "Young", "given_name": "B.\u2009A." }, { "family_name": "Yu", "given_name": "T.\u2009C." }, { "family_name": "Zatschler", "given_name": "B." }, { "family_name": "Zatschler", "given_name": "S." }, { "family_name": "Zaytsev", "given_name": "A." }, { "family_name": "Zhang", "given_name": "E." }, { "family_name": "Zheng", "given_name": "L." }, { "family_name": "Zuniga", "given_name": "A." }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "

We present a new analysis of previously published SuperCDMS data using a profile likelihood framework to search for sub-GeV dark matter (DM) particles through two inelastic scattering channels: bremsstrahlung radiation and the Migdal effect. By considering these possible inelastic scattering channels, experimental sensitivity can be extended to DM masses that are undetectable through the DM-nucleon elastic scattering channel, given the energy threshold of current experiments. We exclude DM masses down to 220  MeV/\ud835\udc50² at 2.7×10\u207b³\u2070 cm² via the bremsstrahlung channel. The Migdal channel search provides overall considerably more stringent limits and excludes DM masses down to 30  MeV/\ud835\udc50² at 5.0×10\u207b³\u2070  cm².

", "doi": "10.1103/physrevd.107.112013", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2023-06-01", "series_number": "11", "volume": "107", "issue": "11", "pages": "112013" }, { "id": "authors:bzfy7-dx384", "collection": "authors", "collection_id": "bzfy7-dx384", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230321-821389800.25", "type": "article", "title": "The Evolution and Mass Dependence of Galaxy Cluster Pressure Profiles at 0.05 \u2264 z \u2264 0.60 and 4 \u00d7 10\u00b9\u2074 M_\u2299 \u2264 M\u2085\u2080\u2080 \u2264 30 \u00d7 10\u00b9\u2074 M_\u2299", "author": [ { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Mantz", "given_name": "Adam B.", "orcid": "0000-0002-8031-1217", "clpid": "Mantz-Adam-B" }, { "family_name": "Rasia", "given_name": "Elena", "orcid": "0000-0003-4175-002X", "clpid": "Rasia-Elena" }, { "family_name": "Allen", "given_name": "Steven W.", "orcid": "0000-0003-0667-5941", "clpid": "Allen-Steven-W" }, { "family_name": "Cui", "given_name": "Weiguang", "orcid": "0000-0002-2113-4863", "clpid": "Cui-Weiguang" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Morris", "given_name": "R. Glenn", "orcid": "0000-0003-2985-9962", "clpid": "Morris-R-Glenn" }, { "family_name": "Wan", "given_name": "Jenny T.", "orcid": "0000-0001-8872-4991", "clpid": "Wan-Jenny-T" } ], "abstract": "We have combined X-ray observations from Chandra with Sunyaev\u2013Zel'dovich effect data from Planck and Bolocam to measure intracluster medium pressure profiles from 0.03 R\u2085\u2080\u2080 \u2264 R \u2264 5 R\u2085\u2080\u2080 for a sample of 21 low-z galaxy clusters with a median redshift of\u3008z\u3009= 0.08 and a median mass of =\u3008M\u2085\u2080\u2080\u3009= 6.1 \u00d7 10\u00b9\u2074 M_\u2299 and a sample of 19 mid-z galaxy clusters with\u3008z\u3009= 0.50 and\u3008M\u2085\u2080\u2080\u3009= 10.6 \u00d7 10\u00b9\u2074 M_\u2299. The mean scaled pressure in the low-z sample is lower at small radii and higher at large radii, a trend that is accurately reproduced in similarly selected samples from The Three Hundred simulations. This difference appears to be primarily due to dynamical state at small radii, evolution at intermediate radii, and a combination of evolution and mass dependence at large radii. Furthermore, the overall flattening of the mean scaled pressure profile in the low-z sample compared to the mid-z sample is consistent with expectations due to differences in the mass accretion rate and the fractional impact of feedback mechanisms. In agreement with previous studies, the fractional scatter about the mean scaled pressure profile reaches a minimum of \u224320% near 0.5 R\u2085\u2080\u2080. This scatter is consistent between the low-z and mid-z samples at all radii, suggesting it is not strongly impacted by sample selection, and this general behavior is reproduced in The Three Hundred simulations. Finally, analytic functions that approximately describe the mass and redshift trends in mean pressure profile shape are provided.", "doi": "10.3847/1538-4357/acb33d", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2023-02-20", "series_number": "2", "volume": "944", "issue": "2", "pages": "Art. No. 221" }, { "id": "authors:m7kek-nmq24", "collection": "authors", "collection_id": "m7kek-nmq24", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221121-712922500.34", "type": "article", "title": "A Multi-chroic Kinetic Inductance Detectors Array Using Hierarchical Phased Array Antenna", "author": [ { "family_name": "Shu", "given_name": "Shibo", "orcid": "0000-0002-6370-2101", "clpid": "Shu-Shibo" }, { "family_name": "Beyer", "given_name": "Andrew", "orcid": "0000-0002-1045-1652", "clpid": "Beyer-Andrew-D" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-Peter-K" }, { "family_name": "Defrance", "given_name": "Fabien", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-Fabien" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "We present a multi-chroic kinetic inductance detector (KID) pixel design integrated with a broadband hierarchical phased-array antenna. Each low-frequency pixel consists of four high-frequency pixels. Four passbands are designed from 125 to 365 GHz according to the atmospheric windows. The lumped element KIDs consist of 100-nm thick AlMn inductors and Nb parallel plate capacitors with hydrogenated amorphous Si dielectric. Two different coupling structures are designed to couple millimeter-wave from microstrip lines to KIDs. The KID designs are optimized for a 10-m-class telescope at a high, dry site, for example, the Leighton Chajnantor Telescope. Preliminary measurement results using Al KIDs are discussed.", "doi": "10.1007/s10909-022-02890-x", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2022-11", "series_number": "3-4", "volume": "209", "issue": "3-4", "pages": "330-336" }, { "id": "authors:nmtyc-66d10", "collection": "authors", "collection_id": "nmtyc-66d10", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221017-15547800.44", "type": "article", "title": "Novel Quantum Sensors for Light Dark Matter and Neutrino Detection", "author": [ { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Figueroa-Feliciano", "given_name": "Enectali", "orcid": "0000-0001-9285-5556", "clpid": "Figueroa-Feliciano-Enectali" } ], "abstract": "The fields of light dark matter and neutrino physics offer compelling signals at recoil energies of eV to even meV, well below the \u2273 keV thresholds of many techniques currently employed in these fields. Sensing of such small energies can benefit from the emergence of so-called quantum sensors, which employ fundamentally quantum mechanical phenomena to transduce energy depositions into electrical signals. This review focuses on quantum sensors under development that will enhance and extend the search for \"particle-like\" interactions of dark matter or enable new measurements of neutrino properties in the coming years.", "doi": "10.1146/annurev-nucl-102020-112133", "issn": "0163-8998", "publisher": "Annual Reviews", "publication": "Annual Review of Nuclear and Particle Science", "publication_date": "2022-09", "volume": "72", "pages": "419-446" }, { "id": "authors:z2vp2-fxy52", "collection": "authors", "collection_id": "z2vp2-fxy52", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220715-332486000", "type": "article", "title": "Ionization yield measurement in a germanium CDMSlite detector using photo-neutron sources", "author": [ { "family_name": "Albakry", "given_name": "M.\u2009F.", "clpid": "Albakry-M-F" }, { "family_name": "Alkhatib", "given_name": "I." }, { "family_name": "Amaral", "given_name": "D.\u2009W.\u2009P." }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-Taylor-B" }, { "family_name": "Aramaki", "given_name": "T." }, { "family_name": "Arnquist", "given_name": "I.\u2009J." }, { "family_name": "Ataee Langroudy", "given_name": "I." }, { "family_name": "Azadbakht", "given_name": "E." }, { "family_name": "Banik", "given_name": "S." }, { "family_name": "Bathurst", "given_name": "C." }, { "family_name": "Bauer", "given_name": "D.\u2009A." }, { "family_name": "Bezerra", "given_name": "L.\u2009V.\u2009S." }, { "family_name": "Bhattacharyya", "given_name": "R." }, { "family_name": "Bowles", "given_name": "M.\u2009A." }, { "family_name": "Brink", "given_name": "P.\u2009L." }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calkins", "given_name": "R." }, { "family_name": "Cameron", "given_name": "R.\u2009A." }, { "family_name": "Cartaro", "given_name": "C." }, { "family_name": "Cerde\u00f1o", "given_name": "D.\u2009G." }, { "family_name": "Chang", "given_name": "Y.-Y." }, { "family_name": "Chaudhuri", "given_name": "M." }, { "family_name": "Chen", "given_name": "R." }, { "family_name": "Chott", "given_name": "N." }, { "family_name": "Cooley", "given_name": "J." }, { "family_name": "Coombes", "given_name": "H." }, { "family_name": "Corbett", "given_name": "J." }, { "family_name": "Cushman", "given_name": "P." }, { "family_name": "De Brienne", "given_name": "F." }, { "family_name": "di Vacri", "given_name": "M.\u2009L." }, { "family_name": "Diamond", "given_name": "M.\u2009D." }, { "family_name": "Fascione", "given_name": "E." }, { "family_name": "Figueroa-Feliciano", "given_name": "E." }, { "family_name": "Fink", "given_name": "C.\u2009W." }, { "family_name": "Fouts", "given_name": "K." }, { "family_name": "Fritts", "given_name": "M." }, { "family_name": "Gerbier", "given_name": "G." }, { "family_name": "Germond", "given_name": "R." }, { "family_name": "Ghaith", "given_name": "M." }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hall", "given_name": "J." }, { "family_name": "Hines", "given_name": "B.\u2009A." }, { "family_name": "Hollister", "given_name": "M.\u2009I." }, { "family_name": "Hong", "given_name": "Z." }, { "family_name": "Hoppe", "given_name": "E.\u2009W." }, { "family_name": "Hsu", "given_name": "L." }, { "family_name": "Huber", "given_name": "M.\u2009E." }, { "family_name": "Iyer", "given_name": "V." }, { "family_name": "Jastram", "given_name": "A." }, { "family_name": "Kashyap", "given_name": "V.\u2009K.\u2009S." }, { "family_name": "Kelsey", "given_name": "M.\u2009H." }, { "family_name": "Kubik", "given_name": "A." }, { "family_name": "Kurinsky", "given_name": "N.\u2009A." }, { "family_name": "Lawrence", "given_name": "R.\u2009E." }, { "family_name": "Lee", "given_name": "M." }, { "family_name": "Li", "given_name": "A." }, { "family_name": "Liu", "given_name": "J." }, { "family_name": "Liu", "given_name": "Y." }, { "family_name": "Loer", "given_name": "B." }, { "family_name": "Lukens", "given_name": "P." }, { "family_name": "MacDonell", "given_name": "D." }, { "family_name": "MacFarlane", "given_name": "D.\u2009B." }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Mandic", "given_name": "V." }, { "family_name": "Mast", "given_name": "N." }, { "family_name": "Mayer", "given_name": "A.\u2009J." }, { "family_name": "Meyer zu Theenhausen", "given_name": "H." }, { "family_name": "Michaud", "given_name": "\u00c9." }, { "family_name": "Michielin", "given_name": "E." }, { "family_name": "Mirabolfathi", "given_name": "N." }, { "family_name": "Mohanty", "given_name": "B." }, { "family_name": "Morales Mendoza", "given_name": "J.\u2009D." }, { "family_name": "Nagorny", "given_name": "S." }, { "family_name": "Nelson", "given_name": "J." }, { "family_name": "Neog", "given_name": "H." }, { "family_name": "Novati", "given_name": "V." }, { "family_name": "Orrell", "given_name": "J.\u2009L." }, { "family_name": "Osborne", "given_name": "M.\u2009D." }, { "family_name": "Oser", "given_name": "S.\u2009M." }, { "family_name": "Page", "given_name": "W.\u2009A." }, { "family_name": "Partridge", "given_name": "R." }, { "family_name": "Pedreros", "given_name": "D.\u2009S." }, { "family_name": "Podviianiuk", "given_name": "R." }, { "family_name": "Ponce", "given_name": "F." }, { "family_name": "Poudel", "given_name": "S." }, { "family_name": "Pradeep", "given_name": "A." }, { "family_name": "Pyle", "given_name": "M." }, { "family_name": "Rau", "given_name": "W." }, { "family_name": "Reid", "given_name": "E." }, { "family_name": "Ren", "given_name": "R." }, { "family_name": "Reynolds", "given_name": "T." }, { "family_name": "Roberts", "given_name": "A." }, { "family_name": "Robinson", "given_name": "A.\u2009E." }, { "family_name": "Saab", "given_name": "T." }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Saikia", "given_name": "I." }, { "family_name": "Sander", "given_name": "J." }, { "family_name": "Sattari", "given_name": "A." }, { "family_name": "Scarff", "given_name": "A." }, { "family_name": "Schmidt", "given_name": "B." }, { "family_name": "Schnee", "given_name": "R.\u2009W." }, { "family_name": "Scorza", "given_name": "S." }, { "family_name": "Serfass", "given_name": "B." }, { "family_name": "Sincavage", "given_name": "D.\u2009J." }, { "family_name": "Stanford", "given_name": "C." }, { "family_name": "Street", "given_name": "J." }, { "family_name": "Thasrawala", "given_name": "F.\u2009K." }, { "family_name": "Toback", "given_name": "D." }, { "family_name": "Underwood", "given_name": "R." }, { "family_name": "Verma", "given_name": "S." }, { "family_name": "Villano", "given_name": "A.\u2009N." }, { "family_name": "von Krosigk", "given_name": "B." }, { "family_name": "Watkins", "given_name": "S.\u2009L." }, { "family_name": "Wen", "given_name": "O.", "clpid": "Wen-Osmond" }, { "family_name": "Williams", "given_name": "Z." }, { "family_name": "Wilson", "given_name": "M.\u2009J." }, { "family_name": "Winchell", "given_name": "J." }, { "family_name": "Wykoff", "given_name": "K." }, { "family_name": "Yellin", "given_name": "S." }, { "family_name": "Young", "given_name": "B.\u2009A." }, { "family_name": "Yu", "given_name": "T.\u2009C." }, { "family_name": "Zatschler", "given_name": "B." }, { "family_name": "Zatschler", "given_name": "S." }, { "family_name": "Zaytsev", "given_name": "A." }, { "family_name": "Zhang", "given_name": "E." }, { "family_name": "Zheng", "given_name": "L." }, { "family_name": "Zuber", "given_name": "S." }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "Two photo-neutron sources, \u2078\u2078Y\u2079Be and \u00b9\u00b2\u2074Sb\u2079Be, have been used to investigate the ionization yield of nuclear recoils in the CDMSlite germanium detectors by the SuperCDMS collaboration. This work evaluates the yield for nuclear recoil energies between 1 and 7 keV at a temperature of \u223c50 mK. We use a geant4 simulation to model the neutron spectrum assuming a charge yield model that is a generalization of the standard Lindhard model and consists of two energy dependent parameters. We perform a likelihood analysis using the simulated neutron spectrum, modeled background, and experimental data to obtain the best fit values of the yield model. The ionization yield between recoil energies of 1 and 7 keV is shown to be significantly lower than predicted by the standard Lindhard model for germanium. There is a general lack of agreement among different experiments using a variety of techniques studying the low energy range of the nuclear recoil yield, which is most critical for interpretation of direct dark matter searches. This suggests complexity in the physical process that many direct detection experiments use to model their primary signal detection mechanism and highlights the need for further studies to clarify underlying systematic effects that have not been well understood up to this point.", "doi": "10.1103/physrevd.105.122002", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2022-06-15", "series_number": "12", "volume": "105", "issue": "12", "pages": "Art. No. 122002" }, { "id": "authors:5rcge-ttc25", "collection": "authors", "collection_id": "5rcge-ttc25", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220608-849722000", "type": "article", "title": "Identifying Drivers of Energy Resolution Variation in a Multi-KID Phonon-Mediated Detector", "author": [ { "family_name": "Ramanathan", "given_name": "Karthik", "orcid": "0000-0003-4215-7834", "clpid": "Ramanathan-Karthik" }, { "family_name": "Aralis", "given_name": "Taylor", "clpid": "Aralis-Taylor" }, { "family_name": "Basu Thakur", "given_name": "Ritoban", "orcid": "0000-0002-3351-3078", "clpid": "Basu-Thakur-Ritoban" }, { "family_name": "Bumble", "given_name": "Bruce", "clpid": "Bumble-Bruce" }, { "family_name": "Chang", "given_name": "Yen-Yung", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Wen", "given_name": "O.", "clpid": "Wen-Osmond" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "Phonon-mediated Kinetic Inductance Detectors (KIDs) on silicon substrates have demonstrated both O(10) eV energy resolution and mm position resolution when used as particle detectors, making them strong candidates for instrumenting next-generation rare event experiments such as in looking for dark matter. Previous work has demonstrated the performance of an 80-KID array on a Si wafer; however, current energy resolution measurements show a \u223c25\u00d7 difference between otherwise identical KIDs\u2014between 5 and 125 eV on energy absorbed by the KID. Here, we use a first principles approach and attempt to identify the drivers behind the variation. In particular, we analyze a subset of 8 KIDs using the unique approach of pulsing neighboring KIDs to generate signals in the target. We tentatively identify differences in quality factor as the likely culprit for the observed differences.", "doi": "10.1007/s10909-022-02753-5", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2022-06-08" }, { "id": "authors:qy2g4-d5576", "collection": "authors", "collection_id": "qy2g4-d5576", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220715-332445000", "type": "article", "title": "Investigating the sources of low-energy events in a SuperCDMS-HVeV detector", "author": [ { "family_name": "Albakry", "given_name": "M.\u2009F.", "clpid": "Albakry-M-F" }, { "family_name": "Alkhatib", "given_name": "I." }, { "family_name": "Amaral", "given_name": "D.\u2009W.\u2009P." }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-Taylor-B" }, { "family_name": "Aramaki", "given_name": "T." }, { "family_name": "Arnquist", "given_name": "I.\u2009J." }, { "family_name": "Ataee Langroudy", "given_name": "I." }, { "family_name": "Azadbakht", "given_name": "E." }, { "family_name": "Banik", "given_name": "S." }, { "family_name": "Bathurst", "given_name": "C." }, { "family_name": "Bauer", "given_name": "D.\u2009A." }, { "family_name": "Bhattacharyya", "given_name": "R." }, { "family_name": "Brink", "given_name": "P.\u2009L." }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calkins", "given_name": "R." }, { "family_name": "Cameron", "given_name": "R.\u2009A." }, { "family_name": "Cartaro", "given_name": "C." }, { "family_name": "Cerde\u00f1o", "given_name": "D.\u2009G." }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Chaudhuri", "given_name": "M." }, { "family_name": "Chen", "given_name": "R." }, { "family_name": "Chott", "given_name": "N." }, { "family_name": "Cooley", "given_name": "J." }, { "family_name": "Coombes", "given_name": "H." }, { "family_name": "Corbett", "given_name": "J." }, { "family_name": "Cushman", "given_name": "P." }, { "family_name": "De Brienne", "given_name": "F." }, { "family_name": "Dharani", "given_name": "S." }, { "family_name": "di Vacri", "given_name": "M.\u2009L." }, { "family_name": "Diamond", "given_name": "M.\u2009D." }, { "family_name": "Fascione", "given_name": "E." }, { "family_name": "Figueroa-Feliciano", "given_name": "E." }, { "family_name": "Fink", "given_name": "C.\u2009W." }, { "family_name": "Fouts", "given_name": "K." }, { "family_name": "Fritts", "given_name": "M." }, { "family_name": "Gerbier", "given_name": "G." }, { "family_name": "Germond", "given_name": "R." }, { "family_name": "Ghaith", "given_name": "M." }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hall", "given_name": "J." }, { "family_name": "Hassan", "given_name": "N." }, { "family_name": "Hines", "given_name": "B.\u2009A." }, { "family_name": "Hollister", "given_name": "M.\u2009I." }, { "family_name": "Hong", "given_name": "Z." }, { "family_name": "Hoppe", "given_name": "E.\u2009W." }, { "family_name": "Hsu", "given_name": "L." }, { "family_name": "Huber", "given_name": "M.\u2009E." }, { "family_name": "Iyer", "given_name": "V." }, { "family_name": "Jastram", "given_name": "A." }, { "family_name": "Kashyap", "given_name": "V.\u2009K.\u2009S." }, { "family_name": "Kelsey", "given_name": "M.\u2009H." }, { "family_name": "Kubik", "given_name": "A." }, { "family_name": "Kurinsky", "given_name": "N.\u2009A." }, { "family_name": "Lawrence", "given_name": "R.\u2009E." }, { "family_name": "Lee", "given_name": "M." }, { "family_name": "Li", "given_name": "A." }, { "family_name": "Liu", "given_name": "J." }, { "family_name": "Liu", "given_name": "Y." }, { "family_name": "Loer", "given_name": "B." }, { "family_name": "Lopez Asamar", "given_name": "E." }, { "family_name": "Lukens", "given_name": "P." }, { "family_name": "MacFarlane", "given_name": "D.\u2009B." }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Mandic", "given_name": "V." }, { "family_name": "Mast", "given_name": "N." }, { "family_name": "Mayer", "given_name": "A.\u2009J." }, { "family_name": "Meyer zu Theenhausen", "given_name": "H." }, { "family_name": "Michaud", "given_name": "\u00c9." }, { "family_name": "Michielin", "given_name": "E." }, { "family_name": "Mirabolfathi", "given_name": "N." }, { "family_name": "Mohanty", "given_name": "B." }, { "family_name": "Nagorny", "given_name": "S." }, { "family_name": "Nelson", "given_name": "J." }, { "family_name": "Neog", "given_name": "H." }, { "family_name": "Novati", "given_name": "V." }, { "family_name": "Orrell", "given_name": "J.\u2009L." }, { "family_name": "Osborne", "given_name": "M.\u2009D." }, { "family_name": "Oser", "given_name": "S.\u2009M." }, { "family_name": "Page", "given_name": "W.\u2009A." }, { "family_name": "Partridge", "given_name": "R." }, { "family_name": "Pedreros", "given_name": "D.\u2009S." }, { "family_name": "Podviianiuk", "given_name": "R." }, { "family_name": "Ponce", "given_name": "F." }, { "family_name": "Poudel", "given_name": "S." }, { "family_name": "Pradeep", "given_name": "A." }, { "family_name": "Pyle", "given_name": "M." }, { "family_name": "Rau", "given_name": "W." }, { "family_name": "Reid", "given_name": "E." }, { "family_name": "Ren", "given_name": "R.", "orcid": "0000-0002-4804-4825" }, { "family_name": "Reynolds", "given_name": "T." }, { "family_name": "Roberts", "given_name": "A." }, { "family_name": "Robinson", "given_name": "A.\u2009E." }, { "family_name": "Saab", "given_name": "T." }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Saikia", "given_name": "I." }, { "family_name": "Sander", "given_name": "J." }, { "family_name": "Sattari", "given_name": "A." }, { "family_name": "Schmidt", "given_name": "B." }, { "family_name": "Schnee", "given_name": "R.\u2009W." }, { "family_name": "Scorza", "given_name": "S." }, { "family_name": "Serfass", "given_name": "B." }, { "family_name": "Poudel", "given_name": "S.\u2009S." }, { "family_name": "Sincavage", "given_name": "D.\u2009J." }, { "family_name": "Stanford", "given_name": "C." }, { "family_name": "Street", "given_name": "J." }, { "family_name": "Sun", "given_name": "H." }, { "family_name": "Thasrawala", "given_name": "F.\u2009K." }, { "family_name": "Toback", "given_name": "D." }, { "family_name": "Underwood", "given_name": "R." }, { "family_name": "Verma", "given_name": "S." }, { "family_name": "Villano", "given_name": "A.\u2009N." }, { "family_name": "von Krosigk", "given_name": "B." }, { "family_name": "Watkins", "given_name": "S.\u2009L." }, { "family_name": "Wen", "given_name": "O.", "clpid": "Wen-Osmond" }, { "family_name": "Williams", "given_name": "Z." }, { "family_name": "Wilson", "given_name": "M.\u2009J." }, { "family_name": "Winchell", "given_name": "J." }, { "family_name": "Wykoff", "given_name": "K." }, { "family_name": "Yellin", "given_name": "S." }, { "family_name": "Young", "given_name": "B.\u2009A." }, { "family_name": "Yu", "given_name": "T.\u2009C." }, { "family_name": "Zatschler", "given_name": "B." }, { "family_name": "Zatschler", "given_name": "S." }, { "family_name": "Zaytsev", "given_name": "A." }, { "family_name": "Zhang", "given_name": "E." }, { "family_name": "Zheng", "given_name": "L." }, { "family_name": "Zuber", "given_name": "S." } ], "abstract": "Recent experiments searching for sub\u2212GeV/c\u00b2 dark matter have observed event excesses close to their respective energy thresholds. Although specific to the individual technologies, the measured excess event rates have been consistently reported at or below event energies of a few-hundred eV, or with charges of a few electron-hole pairs. In the present work, we operated a 1-g silicon SuperCDMS-HVeV detector at three voltages across the crystal (0, 60 and 100 V). The 0 V data show an excess of events in the tens of eV region. Despite this event excess, we demonstrate the ability to set a competitive exclusion limit on the spin-independent dark matter\u2013nucleon elastic scattering cross section for dark matter masses of O(100) MeV/c\u00b2, enabled by operation of the detector at 0 V potential and achievement of a very low O(10) eV threshold for nuclear recoils. Comparing the data acquired at 0, 60 and 100 V potentials across the crystal, we investigated possible sources of the unexpected events observed at low energy. The data indicate that the dominant contribution to the excess is consistent with a hypothesized luminescence from the printed circuit boards used in the detector holder.", "doi": "10.1103/physrevd.105.112006", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2022-06-01", "series_number": "11", "volume": "105", "issue": "11", "pages": "Art. No. 112006" }, { "id": "authors:xj5hp-hxa49", "collection": "authors", "collection_id": "xj5hp-hxa49", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220816-183034033", "type": "monograph", "title": "The Evolution and Mass Dependence of Galaxy Cluster Pressure Profiles at 0.05 \u2264 z \u2264 0.60 and 4 \u00d7 10\u00b9\u2074 M_\u2299 \u2264 M\u2085\u2080\u2080 \u2264 30 \u00d7 10\u00b9\u2074 M_\u2299", "author": [ { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Mantz", "given_name": "Adam B.", "orcid": "0000-0002-8031-1217", "clpid": "Mantz-Adam-B" }, { "family_name": "Rasia", "given_name": "Elena", "orcid": "0000-0003-4175-002X", "clpid": "Rasia-Elena" }, { "family_name": "Allen", "given_name": "Steven W.", "orcid": "0000-0003-0667-5941", "clpid": "Allen-Steven-W" }, { "family_name": "Cui", "given_name": "Weiguang", "orcid": "0000-0002-2113-4863", "clpid": "Cui-Weiguang" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Morris", "given_name": "R. Glenn", "orcid": "0000-0003-2985-9962", "clpid": "Morris-R-Glenn" }, { "family_name": "Wan", "given_name": "Jenny T.", "orcid": "0000-0001-8872-4991", "clpid": "Wan-Jenny-T" } ], "abstract": "We have combined X-ray observations from Chandra with Sunyaev-Zel'dovich (SZ) effect data from Planck and Bolocam to measure intra-cluster medium pressure profiles from 0.03R\u2085\u2080\u2080 \u2264 R \u2264 5R\u2085\u2080\u2080 for a sample of 21 low-z galaxy clusters with a median redshift \u27e8z\u27e9 = 0.08 and a median mass \u27e8M\u2085\u2080\u2080\u27e9 = 6.1 \u00d7 10\u00b9\u2074 M_\u2299 and a sample of 19 mid-z galaxy clusters with \u27e8z\u27e9 = 0.50 and \u27e8M\u2085\u2080\u2080\u27e9 = 10.6 \u00d7 10\u00b9\u2074 M_\u2299. The mean scaled pressure in the low-z sample is lower at small radii and higher at large radii, a trend that is accurately reproduced in similarly selected samples from The300 simulations. This difference appears to be primarily due to dynamical state at small radii, evolution at intermediate radii, and a combination of evolution and mass dependence at large radii. Furthermore, the overall flattening of the mean scaled pressure profile in the low-z sample compared to the mid-z sample is consistent with expectations due to differences in mass accretion rate and the fractional impact of feedback mechanisms. In agreement with previous studies, the fractional scatter about the mean scaled pressure profile reaches a minimum of \u224320 per cent near 0.5R\u2085\u2080\u2080. This scatter is consistent between the low-z and mid-z samples at all radii, suggesting it is not strongly impacted by sample selection, and this general behavior is reproduced in The300 simulations. Finally, analytic functions that approximately describe the mass and redshift trends in mean pressure profile shape are provided.", "doi": "10.48550/arXiv.2206.00091", "publisher": "arXiv", "publication_date": "2022-05-31" }, { "id": "authors:jz8ab-kfq94", "collection": "authors", "collection_id": "jz8ab-kfq94", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220223-919288000", "type": "article", "title": "Probing Hot Gas Components of the Circumgalactic Medium in Cosmological Simulations with the Thermal Sunyaev\u2013Zel'dovich Effect", "author": [ { "family_name": "Kim", "given_name": "Junhan", "orcid": "0000-0002-4274-9373", "clpid": "Kim-Junhan" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Bartlett", "given_name": "James G.", "orcid": "0000-0002-0303-3583", "clpid": "Bartlett-James-G" }, { "family_name": "Amodeo", "given_name": "Stefania", "orcid": "0000-0002-4200-9965", "clpid": "Amodeo-Stefania" }, { "family_name": "Battaglia", "given_name": "Nicholas", "orcid": "0000-0001-5846-0411", "clpid": "Battaglia-Nicholas" }, { "family_name": "Benson", "given_name": "Andrew J.", "orcid": "0000-0001-5501-6008", "clpid": "Benson-Andrew-J" }, { "family_name": "Hill", "given_name": "J. Colin", "orcid": "0000-0002-9539-0835", "clpid": "Hill-J-Colin" }, { "family_name": "Hopkins", "given_name": "Philip F.", "orcid": "0000-0003-3729-1684", "clpid": "Hopkins-P-F" }, { "family_name": "Hummels", "given_name": "Cameron B.", "orcid": "0000-0002-3817-8133", "clpid": "Hummels-Cameron-B" }, { "family_name": "Moser", "given_name": "Emily", "orcid": "0000-0003-1593-1505", "clpid": "Moser-Emily" }, { "family_name": "Orr", "given_name": "Matthew E.", "orcid": "0000-0003-1053-3081", "clpid": "Orr-Matthew-E" } ], "abstract": "The thermal Sunyaev\u2013Zel'dovich (tSZ) effect is a powerful tool with the potential for constraining directly the properties of the hot gas that dominates dark matter halos because it measures pressure and thus thermal energy density. Studying this hot component of the circumgalactic medium (CGM) is important because it is strongly impacted by star formation and active galactic nucleus (AGN) activity in galaxies, participating in the feedback loop that regulates star and black hole mass growth in galaxies. We study the tSZ effect across a wide halo-mass range using three cosmological hydrodynamical simulations: Illustris-TNG, EAGLE, and FIRE-2. Specifically, we present the scaling relation between the tSZ signal and halo mass and the (mass-weighted) radial profiles of gas density, temperature, and pressure for all three simulations. The analysis includes comparisons to Planck tSZ observations and to the thermal pressure profile inferred from the Atacama Cosmology Telescope (ACT) measurements. We compare these tSZ data to simulations to interpret the measurements in terms of feedback and accretion processes in the CGM. We also identify as-yet unobserved potential signatures of these processes that may be visible in future measurements, which will have the capability of measuring tSZ signals to even lower masses. We also perform internal comparisons between runs with different physical assumptions. We conclude (1) there is strong evidence for the impact of feedback at R\u2085\u2080\u2080, but that this impact decreases by 5R\u2085\u2080\u2080, and (2) the thermodynamic profiles of the CGM are highly dependent on the implemented model, such as cosmic-ray or AGN feedback prescriptions.", "doi": "10.3847/1538-4357/ac4750", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2022-02-20", "series_number": "2", "volume": "926", "issue": "2", "pages": "Art. No. 179" }, { "id": "authors:kcxtd-24s35", "collection": "authors", "collection_id": "kcxtd-24s35", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220411-225150461", "type": "monograph", "title": "A multi-chroic kinetic inductance detectors array using hierarchical phased array antenna", "author": [ { "family_name": "Shu", "given_name": "Shibo", "orcid": "0000-0002-6370-2101", "clpid": "Shu-Shibo" }, { "family_name": "Beyer", "given_name": "Andrew", "orcid": "0000-0002-1045-1652", "clpid": "Beyer-Andrew-D" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-Peter-K" }, { "family_name": "Defrance", "given_name": "Fabien", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-Fabien" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "We present a multi-chroic kinetic inductance detector (KID) pixel design integrated with a broadband hierarchical phased-array antenna. Each low-frequency pixel consists of four high-frequency pixels. Four passbands are designed from 125 to 365 GHz according to the atmospheric windows. The lumped element KIDs are designed with 100 nm Al as the inductor and with Nb parallel plate capacitors using hydrogenated amorphous Si as the dielectric. Due to the broadband coverage, two different types of structures are needed to couple light from microstrip lines to the KIDs. The KIDs designs are optimized for a 10-m-class telescope at a high, dry site.", "doi": "10.48550/arXiv.2112.05366", "publisher": "arXiv", "publication_date": "2021-12-10" }, { "id": "authors:z5na9-xkf20", "collection": "authors", "collection_id": "z5na9-xkf20", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20211214-190049765", "type": "monograph", "title": "Performance of a phonon-mediated detector using KIDs optimized for sub-GeV dark matter", "author": [ { "family_name": "Wen", "given_name": "O.", "clpid": "Wen-Osmond" }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-Taylor-B" }, { "family_name": "Basu Thakur", "given_name": "R.", "orcid": "0000-0002-3351-3078", "clpid": "Basu-Thakur-Ritoban" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-B" }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Ramanathan", "given_name": "K.", "clpid": "Ramanathan-Karthik" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "Detection of sub-GeV dark matter candidates requires sub-keV detector thresholds on deposited energy. We provide an update on a gram-scale phonon-mediated KID-based device that was designed for a dark matter search in this mass range at the Northwestern Experimental Underground Site. Currently, the device is demonstrating 6 eV resolution on the energy absorbed by the resonator. With some important assumptions, this translates to 20 eV baseline resolution on energy deposited in the substrate. We show that TLS noise dominates this energy resolution estimate. After modifying the design to mitigate TLS noise, we project 5 eV baseline resolution on energy deposited in the substrate (1.5 eV on energy absorbed by the resonator) for an amplifier-white-noise-dominated device. Finally, we present a clear path forward to sub-eV thresholds, which includes installation of a quantum-limited superconducting parametric amplifier and adjustments to the material makeup of our resonators.", "doi": "10.48550/arXiv.2111.08064", "publisher": "arXiv", "publication_date": "2021-11-15" }, { "id": "authors:bpv2h-dkh02", "collection": "authors", "collection_id": "bpv2h-dkh02", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20211213-225003442", "type": "monograph", "title": "Identifying drivers of energy resolution variation in multi-KID phonon-mediated detectors", "author": [ { "family_name": "Ramanathan", "given_name": "K.", "clpid": "Ramanathan-Karthik" }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-Taylor" }, { "family_name": "Thakur", "given_name": "R. Basu", "clpid": "Thakur-Ritoban-Basu" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-Bruce" }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Wen", "given_name": "O.", "clpid": "Wen-Osmond" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "Phonon-mediated particle detectors employing Kinetic Inductance Detectors (KIDs) on Silicon substrates have demonstrated both O(10) eV energy resolution and mm position resolution, making them strong candidates for instrumenting next generation rare-event experiments such as in looking for dark matter or in neutrino measurements. Previous work has demonstrated the performance of an 80-KID array on a Si wafer, however current energy resolution measurements show a 25x difference between otherwise identical KIDs on the same wafer - between 5 to 125 eV on energy absorbed by the KID. Here, we use a first principles approach and attempt to identify the drivers behind the resolution variation. In particular, we analyze a subset of 8 KIDs using the unique approach of pulsing neighboring KIDs to generate signals in the target. We tentatively identify differences in quality factor terms as the likely culprit for the observed variation.", "doi": "10.48550/arXiv.2111.02587", "publisher": "arXiv", "publication_date": "2021-11-04" }, { "id": "authors:0sv2b-hnv88", "collection": "authors", "collection_id": "0sv2b-hnv88", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220228-183251991", "type": "monograph", "title": "Probing Hot Gas Components of Circumgalactic Medium in Cosmological Simulations with the Thermal Sunyaev-Zel'dovich Effect", "author": [ { "family_name": "Kim", "given_name": "Junhan", "orcid": "0000-0002-4274-9373", "clpid": "Kim-Junhan" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Bartlett", "given_name": "James G.", "orcid": "0000-0002-0303-3583", "clpid": "Bartlett-James-G" }, { "family_name": "Amodeo", "given_name": "Stefania", "orcid": "0000-0002-4200-9965", "clpid": "Amodeo-Stefania" }, { "family_name": "Battaglia", "given_name": "Nicholas", "orcid": "0000-0001-5846-0411", "clpid": "Battaglia-Nicholas" }, { "family_name": "Benson", "given_name": "Andrew J.", "orcid": "0000-0001-5501-6008", "clpid": "Benson-Andrew-J" }, { "family_name": "Hill", "given_name": "J. Colin", "orcid": "0000-0002-9539-0835", "clpid": "Hill-J-Colin" }, { "family_name": "Hopkins", "given_name": "Philip F.", "orcid": "0000-0003-3729-1684", "clpid": "Hopkins-P-F" }, { "family_name": "Hummels", "given_name": "Cameron B.", "orcid": "0000-0002-3817-8133", "clpid": "Hummels-Cameron-B" }, { "family_name": "Moser", "given_name": "Emily", "orcid": "0000-0003-1593-1505", "clpid": "Moser-Emily" }, { "family_name": "Orr", "given_name": "Matthew E.", "orcid": "0000-0003-1053-3081", "clpid": "Orr-Matthew-E" } ], "abstract": "The thermal Sunyaev-Zel'dovich (tSZ) effect is a powerful tool with the potential for constraining directly the properties of the hot gas that dominates dark matter halos because it measures pressure and thus thermal energy density. Studying this hot component of the circumgalactic medium (CGM) is important because it is strongly impacted by star-formation and active galactic nuclei (AGN) activity in galaxies, participating in the feedback loop that regulates star and black hole mass growth in galaxies.\nWe study the tSZ effect across a wide halo mass range using three cosmological hydrodynamical simulations: Illustris-TNG, EAGLE, and FIRE-2. Specifically, we present the scaling relation between tSZ signal and halo mass and radial profiles of gas density, temperature, and pressure for all three simulations. The analysis includes comparisons to Planck tSZ observations and to the thermal pressure profile inferred from the Atacama Cosmology Telescope (ACT) measurements. We compare these tSZ data to the simulations to interpret the measurements in terms of feedback and accretion processes in the CGM. We also identify as-yet unobserved potential signatures of these processes that may be visible in future measurements, which will have the capability of measuring tSZ signals to even lower masses. We also perform internal comparisons between runs with different physical assumptions. We conclude: (1) there is strong evidence for the impact of feedback at R\u2085\u2080\u2080 but that this impact decreases by 5R\u2085\u2080\u2080, and (2) the thermodynamic profiles of the CGM are highly dependent on the implemented model, such as cosmic-ray or AGN feedback prescriptions.", "doi": "10.48550/arXiv.2110.15381", "publisher": "arXiv", "publication_date": "2021-10-28" }, { "id": "authors:hx8q3-tfd41", "collection": "authors", "collection_id": "hx8q3-tfd41", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210830-203806826", "type": "article", "title": "Constraints on Lightly Ionizing Particles from CDMSlite", "author": [ { "family_name": "Alkhatib", "given_name": "I.", "clpid": "Alkhatib-I" }, { "family_name": "Amaral", "given_name": "D.\u2009W.\u2009P." }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-Taylor-B" }, { "family_name": "Aramaki", "given_name": "T." }, { "family_name": "Arnquist", "given_name": "I.\u2009J." }, { "family_name": "Ataee Langroudy", "given_name": "I." }, { "family_name": "Azadbakht", "given_name": "E." }, { "family_name": "Banik", "given_name": "S.", "orcid": "0000-0003-1925-0088" }, { "family_name": "Barker", "given_name": "D." }, { "family_name": "Bathurst", "given_name": "C." }, { "family_name": "Bauer", "given_name": "D.\u2009A." }, { "family_name": "Bezerra", "given_name": "L.\u2009V.\u2009S." }, { "family_name": "Bhattacharyya", "given_name": "R." }, { "family_name": "Bowles", "given_name": "M.\u2009A." }, { "family_name": "Brink", "given_name": "P.\u2009L." }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calkins", "given_name": "R." }, { "family_name": "Cameron", "given_name": "R.\u2009A." }, { "family_name": "Cartaro", "given_name": "C." }, { "family_name": "Cerde\u00f1o", "given_name": "D.\u2009G." }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Chaudhuri", "given_name": "M." }, { "family_name": "Chen", "given_name": "R." }, { "family_name": "Chott", "given_name": "N." }, { "family_name": "Cooley", "given_name": "J." }, { "family_name": "Coombes", "given_name": "H." }, { "family_name": "Corbett", "given_name": "J." }, { "family_name": "Cushman", "given_name": "P." }, { "family_name": "De Brienne", "given_name": "F." }, { "family_name": "di Vacri", "given_name": "M.\u2009L." }, { "family_name": "Diamond", "given_name": "M.\u2009D." }, { "family_name": "Fascione", "given_name": "E." }, { "family_name": "Figueroa-Feliciano", "given_name": "E." }, { "family_name": "Fink", "given_name": "C.\u2009W." }, { "family_name": "Fouts", "given_name": "K." }, { "family_name": "Fritts", "given_name": "M." }, { "family_name": "Gerbier", "given_name": "G." }, { "family_name": "Germond", "given_name": "R." }, { "family_name": "Ghaith", "given_name": "M." }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Harris", "given_name": "H.\u2009R." }, { "family_name": "Hines", "given_name": "B.\u2009A." }, { "family_name": "Hollister", "given_name": "M.\u2009I." }, { "family_name": "Hong", "given_name": "Z." }, { "family_name": "Hoppe", "given_name": "E.\u2009W." }, { "family_name": "Hsu", "given_name": "L." }, { "family_name": "Huber", "given_name": "M.\u2009E." }, { "family_name": "Iyer", "given_name": "V." }, { "family_name": "Jardin", "given_name": "D." }, { "family_name": "Jastram", "given_name": "A." }, { "family_name": "Kashyap", "given_name": "V.\u2009K.\u2009S." }, { "family_name": "Kelsey", "given_name": "M.\u2009H." }, { "family_name": "Kubik", "given_name": "A." }, { "family_name": "Kurinsky", "given_name": "N.\u2009A." }, { "family_name": "Lawrence", "given_name": "R.\u2009E." }, { "family_name": "Li", "given_name": "A." }, { "family_name": "Loer", "given_name": "B." }, { "family_name": "Lopez Asamar", "given_name": "E." }, { "family_name": "Lukens", "given_name": "P." }, { "family_name": "MacFarlane", "given_name": "D.\u2009B." }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Mandic", "given_name": "V." }, { "family_name": "Mast", "given_name": "N." }, { "family_name": "Mayer", "given_name": "A.\u2009J." }, { "family_name": "Meyer zu Theenhausen", "given_name": "H." }, { "family_name": "Michaud", "given_name": "\u00c9.\u2009M." }, { "family_name": "Michielin", "given_name": "E." }, { "family_name": "Mirabolfathi", "given_name": "N." }, { "family_name": "Mohanty", "given_name": "B." }, { "family_name": "Morales Mendoza", "given_name": "J.\u2009D." }, { "family_name": "Nagorny", "given_name": "S." }, { "family_name": "Nelson", "given_name": "J." }, { "family_name": "Neog", "given_name": "H." }, { "family_name": "Novati", "given_name": "V." }, { "family_name": "Orrell", "given_name": "J.\u2009L." }, { "family_name": "Oser", "given_name": "S.\u2009M." }, { "family_name": "Page", "given_name": "W.\u2009A." }, { "family_name": "Partridge", "given_name": "R." }, { "family_name": "Podviianiuk", "given_name": "R." }, { "family_name": "Ponce", "given_name": "F." }, { "family_name": "Poudel", "given_name": "S." }, { "family_name": "Pradeep", "given_name": "A." }, { "family_name": "Pyle", "given_name": "M." }, { "family_name": "Rau", "given_name": "W." }, { "family_name": "Reid", "given_name": "E." }, { "family_name": "Ren", "given_name": "R." }, { "family_name": "Reynolds", "given_name": "T." }, { "family_name": "Roberts", "given_name": "A." }, { "family_name": "Robinson", "given_name": "A.\u2009E." }, { "family_name": "Saab", "given_name": "T." }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Sander", "given_name": "J." }, { "family_name": "Sattari", "given_name": "A." }, { "family_name": "Schnee", "given_name": "R.\u2009W." }, { "family_name": "Scorza", "given_name": "S." }, { "family_name": "Serfass", "given_name": "B." }, { "family_name": "Sincavage", "given_name": "D.\u2009J." }, { "family_name": "Stanford", "given_name": "C." }, { "family_name": "Street", "given_name": "J." }, { "family_name": "Toback", "given_name": "D." }, { "family_name": "Underwood", "given_name": "R." }, { "family_name": "Verma", "given_name": "S." }, { "family_name": "Villano", "given_name": "A.\u2009N." }, { "family_name": "von Krosigk", "given_name": "B." }, { "family_name": "Watkins", "given_name": "S.\u2009L." }, { "family_name": "Wilson", "given_name": "J.\u2009S." }, { "family_name": "Wilson", "given_name": "M.\u2009J." }, { "family_name": "Winchell", "given_name": "J." }, { "family_name": "Wright", "given_name": "D.\u2009H." }, { "family_name": "Yellin", "given_name": "S." }, { "family_name": "Young", "given_name": "B.\u2009A." }, { "family_name": "Yu", "given_name": "T.\u2009C." }, { "family_name": "Zhang", "given_name": "E." }, { "family_name": "Zhang", "given_name": "H.\u2009G." }, { "family_name": "Zhao", "given_name": "X." }, { "family_name": "Zheng", "given_name": "L." }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) achieved efficient detection of very small recoil energies in its germanium target, resulting in sensitivity to lightly ionizing particles (LIPs) in a previously unexplored region of charge, mass, and velocity parameter space. We report first direct-detection limits calculated using the optimum interval method on the vertical intensity of cosmogenically produced LIPs with an electric charge smaller than e/(3 \u00d7 10\u2075), as well as the strongest limits for charge \u2264 e/160, with a minimum vertical intensity of 1.36 \u00d7 10\u207b\u2077 cm\u207b\u00b2 s\u207b\u00b9 sr\u207b\u00b9 at charge e/160. These results apply over a wide range of LIP masses (5 MeV/c\u00b2 to 100 TeV/c\u00b2) and cover a wide range of \u03b2\u03b3 values (0.1\u201310\u2076), thus excluding nonrelativistic LIPs with \u03b2\u03b3 as small as 0.1 for the first time.", "doi": "10.1103/PhysRevLett.127.081802", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2021-08-18", "series_number": "8", "volume": "127", "issue": "8", "pages": "Art. No. 081802" }, { "id": "authors:a5k2p-zsp16", "collection": "authors", "collection_id": "a5k2p-zsp16", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210823-195440613", "type": "article", "title": "Light Dark Matter Search with a High-Resolution Athermal Phonon Detector Operated above Ground", "author": [ { "family_name": "Alkhatib", "given_name": "I.", "clpid": "Alkhatib-I" }, { "family_name": "Amaral", "given_name": "D.\u2009W.\u2009P." }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-Taylor-B" }, { "family_name": "Aramaki", "given_name": "T." }, { "family_name": "Arnquist", "given_name": "I.\u2009J." }, { "family_name": "Ataee Langroudy", "given_name": "I." }, { "family_name": "Azadbakht", "given_name": "E." }, { "family_name": "Banik", "given_name": "S." }, { "family_name": "Barker", "given_name": "D." }, { "family_name": "Bathurst", "given_name": "C." }, { "family_name": "Bauer", "given_name": "D.\u2009A." }, { "family_name": "Bezerra", "given_name": "L.\u2009V.\u2009S." }, { "family_name": "Bhattacharyya", "given_name": "R." }, { "family_name": "Binder", "given_name": "T." }, { "family_name": "Bowles", "given_name": "M.\u2009A." }, { "family_name": "Brink", "given_name": "P.\u2009L." }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calkins", "given_name": "R." }, { "family_name": "Cameron", "given_name": "R.\u2009A." }, { "family_name": "Cartaro", "given_name": "C." }, { "family_name": "Cerde\u00f1o", "given_name": "D.\u2009G." }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Chaudhuri", "given_name": "M." }, { "family_name": "Chen", "given_name": "R." }, { "family_name": "Chott", "given_name": "N." }, { "family_name": "Cooley", "given_name": "J." }, { "family_name": "Coombes", "given_name": "H." }, { "family_name": "Corbett", "given_name": "J." }, { "family_name": "Cushman", "given_name": "P." }, { "family_name": "De Brienne", "given_name": "F." }, { "family_name": "di Vacri", "given_name": "M.\u2009L." }, { "family_name": "Diamond", "given_name": "M.\u2009D." }, { "family_name": "Fascione", "given_name": "E." }, { "family_name": "Figueroa-Feliciano", "given_name": "E." }, { "family_name": "Fink", "given_name": "C.\u2009W." }, { "family_name": "Fouts", "given_name": "K." }, { "family_name": "Fritts", "given_name": "M." }, { "family_name": "Gerbier", "given_name": "G." }, { "family_name": "Germond", "given_name": "R." }, { "family_name": "Ghaith", "given_name": "M." }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Harris", "given_name": "H.\u2009R." }, { "family_name": "Herbert", "given_name": "N." }, { "family_name": "Hines", "given_name": "B.\u2009A." }, { "family_name": "Hollister", "given_name": "M.\u2009I." }, { "family_name": "Hong", "given_name": "Z." }, { "family_name": "Hoppe", "given_name": "E.\u2009W." }, { "family_name": "Hsu", "given_name": "L." }, { "family_name": "Huber", "given_name": "M.\u2009E." }, { "family_name": "Iyer", "given_name": "V." }, { "family_name": "Jardin", "given_name": "D." }, { "family_name": "Jastram", "given_name": "A." }, { "family_name": "Kashyap", "given_name": "V.\u2009K.\u2009S." }, { "family_name": "Kelsey", "given_name": "M.\u2009H." }, { "family_name": "Kubik", "given_name": "A." }, { "family_name": "Kurinsky", "given_name": "N.\u2009A." }, { "family_name": "Lawrence", "given_name": "R.\u2009E." }, { "family_name": "Li", "given_name": "A." }, { "family_name": "Loer", "given_name": "B." }, { "family_name": "Lopez Asamar", "given_name": "E." }, { "family_name": "Lukens", "given_name": "P." }, { "family_name": "MacDonell", "given_name": "D." }, { "family_name": "MacFarlane", "given_name": "D.\u2009B." }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Mandic", "given_name": "V." }, { "family_name": "Mast", "given_name": "N." }, { "family_name": "Mayer", "given_name": "A.\u2009J." }, { "family_name": "Meyer zu Theenhausen", "given_name": "H." }, { "family_name": "Michaud", "given_name": "\u00c9.\u2009M." }, { "family_name": "Michielin", "given_name": "E." }, { "family_name": "Mirabolfathi", "given_name": "N." }, { "family_name": "Mohanty", "given_name": "B." }, { "family_name": "Morales Mendoza", "given_name": "J.\u2009D." }, { "family_name": "Nagorny", "given_name": "S." }, { "family_name": "Nelson", "given_name": "J." }, { "family_name": "Neog", "given_name": "H." }, { "family_name": "Novati", "given_name": "V." }, { "family_name": "Orrell", "given_name": "J.\u2009L." }, { "family_name": "Oser", "given_name": "S.\u2009M." }, { "family_name": "Page", "given_name": "W.\u2009A." }, { "family_name": "Pakarha", "given_name": "P." }, { "family_name": "Partridge", "given_name": "R." }, { "family_name": "Podviianiuk", "given_name": "R." }, { "family_name": "Ponce", "given_name": "F." }, { "family_name": "Poudel", "given_name": "S." }, { "family_name": "Pyle", "given_name": "M." }, { "family_name": "Rau", "given_name": "W." }, { "family_name": "Reid", "given_name": "E." }, { "family_name": "Ren", "given_name": "R." }, { "family_name": "Reynolds", "given_name": "T." }, { "family_name": "Roberts", "given_name": "A." }, { "family_name": "Robinson", "given_name": "A.\u2009E." }, { "family_name": "Saab", "given_name": "T." }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Sander", "given_name": "J." }, { "family_name": "Sattari", "given_name": "A." }, { "family_name": "Schnee", "given_name": "R.\u2009W." }, { "family_name": "Scorza", "given_name": "S." }, { "family_name": "Serfass", "given_name": "B." }, { "family_name": "Sincavage", "given_name": "D.\u2009J." }, { "family_name": "Stanford", "given_name": "C." }, { "family_name": "Street", "given_name": "J." }, { "family_name": "Toback", "given_name": "D." }, { "family_name": "Underwood", "given_name": "R." }, { "family_name": "Verma", "given_name": "S." }, { "family_name": "Villano", "given_name": "A.\u2009N." }, { "family_name": "von Krosigk", "given_name": "B." }, { "family_name": "Watkins", "given_name": "S.\u2009L.", "orcid": "0000-0003-0649-1923" }, { "family_name": "Wills", "given_name": "L." }, { "family_name": "Wilson", "given_name": "J.\u2009S." }, { "family_name": "Wilson", "given_name": "M.\u2009J." }, { "family_name": "Winchell", "given_name": "J." }, { "family_name": "Wright", "given_name": "D.\u2009H." }, { "family_name": "Yellin", "given_name": "S." }, { "family_name": "Young", "given_name": "B.\u2009A." }, { "family_name": "Yu", "given_name": "T.\u2009C." }, { "family_name": "Zhang", "given_name": "E." }, { "family_name": "Zhang", "given_name": "H.\u2009G." }, { "family_name": "Zhao", "given_name": "X." }, { "family_name": "Zheng", "given_name": "L." }, { "family_name": "Camilleri", "given_name": "J." }, { "family_name": "Kolomensky", "given_name": "Yu.\u2009G." }, { "family_name": "Zuber", "given_name": "S." }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "We present limits on spin-independent dark matter-nucleon interactions using a 10.6 g Si athermal phonon detector with a baseline energy resolution of \u03c3_E = 3.86\u00b10.04(stat)^(+0.19)_(\u22120.00)(syst)\u2009\u2009eV. This exclusion analysis sets the most stringent dark matter-nucleon scattering cross-section limits achieved by a cryogenic detector for dark matter particle masses from 93 to 140\u2009\u2009MeV/c\u00b2, with a raw exposure of 9.9 g\u2009d acquired at an above-ground facility. This work illustrates the scientific potential of detectors with athermal phonon sensors with eV-scale energy resolution for future dark matter searches.", "doi": "10.1103/physrevlett.127.061801", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2021-08-06", "series_number": "6", "volume": "127", "issue": "6", "pages": "Art. No. 061801" }, { "id": "authors:mdk1q-8rc83", "collection": "authors", "collection_id": "mdk1q-8rc83", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210406-074843845", "type": "article", "title": "CLUMP-3D: the lack of non-thermal motions in galaxy cluster cores", "author": [ { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Sereno", "given_name": "Mauro", "orcid": "0000-0003-0302-0325", "clpid": "Sereno-Mauro" }, { "family_name": "Ettori", "given_name": "Stefano", "orcid": "0000-0003-4117-8617", "clpid": "Ettori-Stefano" }, { "family_name": "Rasia", "given_name": "Elena", "orcid": "0000-0003-4175-002X", "clpid": "Rasia-Elena" }, { "family_name": "Cui", "given_name": "Weiguang", "orcid": "0000-0002-2113-4863", "clpid": "Cui-Weiguang" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Umetsu", "given_name": "Keiichi", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" }, { "family_name": "Yepes", "given_name": "Gustavo", "orcid": "0000-0001-5031-7936", "clpid": "Yepes-Gustavo" } ], "abstract": "We report the non-thermal pressure fraction (P_(nt)/P_(tot)) obtained from a three-dimensional triaxial analysis of 16 galaxy clusters in the CLASH sample using gravitational lensing (GL) data primarily from Subaru and HST, X-ray spectroscopic imaging from Chandra, and Sunyaev\u2013Zel'dovich effect (SZE) data from Planck and Bolocam. Our results span the approximate radial range 0.015\u20130.4\u2009R_(200m) (\u223c35\u20131000\u2009kpc). At cluster-centric radii smaller than 0.1\u2009R_(200m) the ensemble average P_(nt)/P_(tot) is consistent with zero with an upper limit of 9\u2009per cent, indicating that heating from active galactic nuclei and other relevant processes does not produce significant deviations from hydrostatic equilibrium (HSE). The ensemble average P_(nt)/P_(tot) increases outside of this radius to approximately 20\u2009per cent at 0.4\u2009R_(200m), as expected from simulations, due to newly accreted material thermalizing via a series of shocks. Also in agreement with simulations, we find significant cluster-to-cluster variation in P_(nt)/P_(tot) and little difference in the ensemble average P_(nt)/P_(tot) based on dynamical state. We conclude that on average, even for diverse samples, HSE-derived masses in the very central regions of galaxy clusters require only modest corrections due to non-thermal motions.", "doi": "10.1093/mnras/stab1542", "issn": "0035-8711", "publisher": "Royal Astronomical Society", "publication": "Monthly Notices of the Royal Astronomical Society", "publication_date": "2021-08", "series_number": "3", "volume": "505", "issue": "3", "pages": "4338-4344" }, { "id": "authors:95n9j-9kb43", "collection": "authors", "collection_id": "95n9j-9kb43", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210331-083800968", "type": "article", "title": "Measuring H\u2080 using X-ray and SZ effect observations of dynamically relaxed galaxy clusters", "author": [ { "family_name": "Wan", "given_name": "Jenny T.", "orcid": "0000-0001-8872-4991", "clpid": "Wan-Jenny-T" }, { "family_name": "Mantz", "given_name": "Adam B.", "orcid": "0000-0002-8031-1217", "clpid": "Mantz-Adam-B" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Allen", "given_name": "Steven W.", "clpid": "Allen-Steven-W" }, { "family_name": "Morris", "given_name": "R. Glenn", "clpid": "Morris-R-Glenn" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "We use a sample of 14 massive, dynamically relaxed galaxy clusters to constrain the Hubble constant, H\u2080, by combining X-ray and Sunyaev\u2013Zel'dovich (SZ) effect signals measured with Chandra, Planck, and Bolocam. This is the first such analysis to marginalize over an empirical, data-driven prior on the overall accuracy of X-ray temperature measurements, while our restriction to the most relaxed, massive clusters also minimizes astrophysical systematics. For a cosmological-constant model with \u03a9_m = 0.3 and \u03a9_\u039b = 0.7, we find H\u2080 = 67.3^(+21.3)_(\u221213.3) kms\u207b\u00b9 Mpc\u207b\u00b9\u2060, limited by the temperature calibration uncertainty (compared to the statistically limited constraint of H\u2080 = 72.3^(+7.6)_(\u22127.6) kms\u207b\u00b9 Mpc\u207b\u00b9\u2060). The intrinsic scatter in the X-ray/SZ pressure ratio is found to be 13 \u00b1 4 per cent (10 \u00b1 3 per cent when two clusters with significant galactic dust emission are removed from the sample), consistent with being primarily due to triaxiality and projection. We discuss the prospects for reducing the dominant systematic limitation to this analysis, with improved X-ray calibration and/or precise measurements of the relativistic SZ effect providing a plausible route to per cent level constraints on H\u2080.", "doi": "10.1093/mnras/stab948", "issn": "0035-8711", "publisher": "Royal Astronomical Society", "publication": "Monthly Notices of the Royal Astronomical Society", "publication_date": "2021-06", "series_number": "1", "volume": "504", "issue": "1", "pages": "1062-1076" }, { "id": "authors:k966d-gmx36", "collection": "authors", "collection_id": "k966d-gmx36", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20210113-145346475", "type": "book_section", "title": "The Leighton Chajnantor Telescope: Project update and mechanical structural analysis in preparations for new deployment in Chajnantor, Chile", "book_title": "Ground-based and Airborne Telescopes VIII", "author": [ { "family_name": "Vial", "given_name": "Jos\u00e9", "clpid": "Vial-Jos\u00e9-T" }, { "family_name": "Arroyo", "given_name": "David", "clpid": "Arroyo-David" }, { "family_name": "Canales", "given_name": "Cristian", "clpid": "Canales-Cristian" }, { "family_name": "Navarro", "given_name": "Julio", "clpid": "Navarro-Julio" }, { "family_name": "Reeves", "given_name": "Rodrigo A.", "orcid": "0000-0001-5704-271X", "clpid": "Reeves-Rodrigo-A" }, { "family_name": "Dufeu", "given_name": "Emilio", "clpid": "Dufeu-Emilio" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Parks", "given_name": "Gary S.", "clpid": "Parks-Gary-S" }, { "family_name": "Woody", "given_name": "David", "clpid": "Woody-David-P" }, { "family_name": "Jinpeng", "given_name": "Li", "clpid": "Jinpeng-Li" }, { "family_name": "Jinbiao", "given_name": "Zhao", "clpid": "Jinbiao-Zhao" }, { "family_name": "Yong", "given_name": "Ma", "clpid": "Yong-Ma" } ], "contributor": [ { "family_name": "Marshall", "given_name": "Heather K.", "clpid": "Marshall-Heather-K" }, { "family_name": "Spyromilio", "given_name": "Jason", "clpid": "Spyromilio-Jason" }, { "family_name": "Usuda", "given_name": "Tomonori", "clpid": "Usuda-Tomonori" } ], "abstract": "The LCT project aims to refurbish the CSO telescope, move it from Maunakea to Chajnantor, in Chile, and operate it scientifically for 10 years. The relocation of the telescope involves a variety of changes in the working conditions, which demands in-depth mechanical analysis. To conduct the required studies, an FEM model of the entire telescope has been developed, together with CFD tools. This paper introduces the LCT project, presents the full-FEM model, its validation, and the first steps towards these analyses. Preliminary results of the simulations of the telescope, considering the working conditions at the Plateau, are also shown.", "doi": "10.1117/12.2562278", "isbn": "9781510636774", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2020-12-13", "pages": "Art. No. 114453C" }, { "id": "authors:ydgdm-nk076", "collection": "authors", "collection_id": "ydgdm-nk076", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201116-104159908", "type": "article", "title": "Constraints on low-mass, relic dark matter candidates from a surface-operated SuperCDMS single-charge sensitive detector", "author": [ { "family_name": "Amaral", "given_name": "D.\u2009W.", "clpid": "Amaral-D-W" }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-T" }, { "family_name": "Aramaki", "given_name": "T." }, { "family_name": "Arnquist", "given_name": "I.\u2009J." }, { "family_name": "Azadbakht", "given_name": "E." }, { "family_name": "Banik", "given_name": "S." }, { "family_name": "Barker", "given_name": "D." }, { "family_name": "Bathurst", "given_name": "C." }, { "family_name": "Bauer", "given_name": "D.\u2009A." }, { "family_name": "Bezerra", "given_name": "L.\u2009V.\u2009S." }, { "family_name": "Bhattacharyya", "given_name": "R." }, { "family_name": "Binder", "given_name": "T." }, { "family_name": "Bowles", "given_name": "M.\u2009A." }, { "family_name": "Brink", "given_name": "P.\u2009L." }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calkins", "given_name": "R." }, { "family_name": "Cameron", "given_name": "R.\u2009A." }, { "family_name": "Cartaro", "given_name": "C." }, { "family_name": "Cerde\u00f1o", "given_name": "D.\u2009G." }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Chen", "given_name": "R." }, { "family_name": "Chott", "given_name": "N." }, { "family_name": "Cooley", "given_name": "J." }, { "family_name": "Coombes", "given_name": "H." }, { "family_name": "Corbett", "given_name": "J." }, { "family_name": "Cushman", "given_name": "P." }, { "family_name": "De Brienne", "given_name": "F." }, { "family_name": "di Vacri", "given_name": "M.\u2009L." }, { "family_name": "Diamond", "given_name": "M.\u2009D." }, { "family_name": "Fascione", "given_name": "E." }, { "family_name": "Figueroa-Feliciano", "given_name": "E." }, { "family_name": "Fink", "given_name": "C.\u2009W." }, { "family_name": "Fouts", "given_name": "K." }, { "family_name": "Fritts", "given_name": "M." }, { "family_name": "Gerbier", "given_name": "G." }, { "family_name": "Germond", "given_name": "R." }, { "family_name": "Ghaith", "given_name": "M." }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Harris", "given_name": "H.\u2009R." }, { "family_name": "Herbert", "given_name": "N." }, { "family_name": "Hines", "given_name": "B.\u2009A." }, { "family_name": "Hollister", "given_name": "M.\u2009I." }, { "family_name": "Hong", "given_name": "Z." }, { "family_name": "Hoppe", "given_name": "E.\u2009W." }, { "family_name": "Hsu", "given_name": "L." }, { "family_name": "Huber", "given_name": "M.\u2009E." }, { "family_name": "Iyer", "given_name": "V." }, { "family_name": "Jardin", "given_name": "D." }, { "family_name": "Jastram", "given_name": "A." }, { "family_name": "Kelsey", "given_name": "M.\u2009H." }, { "family_name": "Kubik", "given_name": "A." }, { "family_name": "Kurinsky", "given_name": "N.\u2009A." }, { "family_name": "Lawrence", "given_name": "R.\u2009E." }, { "family_name": "Li", "given_name": "A." }, { "family_name": "Loer", "given_name": "B." }, { "family_name": "Lopez Asamar", "given_name": "E." }, { "family_name": "Lukens", "given_name": "P." }, { "family_name": "MacDonell", "given_name": "D." }, { "family_name": "MacFarlane", "given_name": "D.\u2009B." }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Mandic", "given_name": "V." }, { "family_name": "Mast", "given_name": "N." }, { "family_name": "Mayer", "given_name": "A.\u2009J." }, { "family_name": "Michaud", "given_name": "\u00c9.\u2009M." }, { "family_name": "Michielin", "given_name": "E." }, { "family_name": "Mirabolfathi", "given_name": "N." }, { "family_name": "Mohanty", "given_name": "B." }, { "family_name": "Morales Mendoza", "given_name": "J.\u2009D." }, { "family_name": "Nagorny", "given_name": "S." }, { "family_name": "Nelson", "given_name": "J." }, { "family_name": "Neog", "given_name": "H." }, { "family_name": "Novati", "given_name": "V." }, { "family_name": "Orrell", "given_name": "J.\u2009L." }, { "family_name": "Oser", "given_name": "S.\u2009M." }, { "family_name": "Page", "given_name": "W.\u2009A." }, { "family_name": "Pakarha", "given_name": "P." }, { "family_name": "Partridge", "given_name": "R." }, { "family_name": "Podviianiuk", "given_name": "R." }, { "family_name": "Ponce", "given_name": "F." }, { "family_name": "Poudel", "given_name": "S." }, { "family_name": "Pyle", "given_name": "M." }, { "family_name": "Rau", "given_name": "W." }, { "family_name": "Reid", "given_name": "E." }, { "family_name": "Ren", "given_name": "R." }, { "family_name": "Reynolds", "given_name": "T." }, { "family_name": "Roberts", "given_name": "A." }, { "family_name": "Robinson", "given_name": "A.\u2009E." }, { "family_name": "Rogers", "given_name": "H.\u2009E." }, { "family_name": "Saab", "given_name": "T." }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Sander", "given_name": "J." }, { "family_name": "Sattari", "given_name": "A." }, { "family_name": "Schnee", "given_name": "R.\u2009W." }, { "family_name": "Scorza", "given_name": "S." }, { "family_name": "Serfass", "given_name": "B." }, { "family_name": "Sincavage", "given_name": "D.\u2009J." }, { "family_name": "Stanford", "given_name": "C." }, { "family_name": "Stein", "given_name": "M." }, { "family_name": "Street", "given_name": "J." }, { "family_name": "Toback", "given_name": "D." }, { "family_name": "Underwood", "given_name": "R." }, { "family_name": "Verma", "given_name": "S." }, { "family_name": "Villano", "given_name": "A.\u2009N." }, { "family_name": "von Krosigk", "given_name": "B." }, { "family_name": "Watkins", "given_name": "S.\u2009L." }, { "family_name": "Wills", "given_name": "L." }, { "family_name": "Wilson", "given_name": "J.\u2009S." }, { "family_name": "Wilson", "given_name": "M.\u2009J.", "orcid": "0000-0002-6723-3795" }, { "family_name": "Winchell", "given_name": "J." }, { "family_name": "Wright", "given_name": "D.\u2009H." }, { "family_name": "Yellin", "given_name": "S." }, { "family_name": "Young", "given_name": "B.\u2009A." }, { "family_name": "Yu", "given_name": "T.\u2009C." }, { "family_name": "Zhang", "given_name": "E." }, { "family_name": "Zhang", "given_name": "H.\u2009G." }, { "family_name": "Zhao", "given_name": "X." }, { "family_name": "Zheng", "given_name": "L." } ], "abstract": "This article presents an analysis and the resulting limits on light dark matter inelastically scattering off of electrons, and on dark photon and axionlike particle absorption, using a second-generation SuperCDMS high-voltage eV-resolution detector. The 0.93 g Si detector achieved a 3 eV phonon energy resolution; for a detector bias of 100 V, this corresponds to a charge resolution of 3% of a single electron-hole pair. The energy spectrum is reported from a blind analysis with 1.2 g-days of exposure acquired in an above-ground laboratory. With charge carrier trapping and impact ionization effects incorporated into the dark matter signal models, the dark matter-electron cross section \u03c3_e is constrained for dark matter masses from 0.5 to 10\u2074\u2009\u2009MeV/c\u00b2; in the mass range from 1.2 to 50\u2009\u2009eV/c\u00b2 the dark photon kinetic mixing parameter \u03f5 and the axioelectric coupling constant gae are constrained. The minimum 90% confidence-level upper limits within the above-mentioned mass ranges are \u03c3_e = 8.7\u00d710\u207b\u00b3\u2074 cm\u00b2, \u03f5 = 3.3\u00d710\u207b\u00b9\u2074, and g_(ae) = 1.0\u00d710\u207b\u2079.", "doi": "10.1103/physrevd.102.091101", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2020-11-01", "series_number": "9", "volume": "102", "issue": "9", "pages": "Art. No. 091101" }, { "id": "authors:rdq0e-4jb28", "collection": "authors", "collection_id": "rdq0e-4jb28", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191220-102933374", "type": "article", "title": "Multilayer Etched Antireflective Structures for Silicon Vacuum Windows", "author": [ { "family_name": "Macioce", "given_name": "T.", "orcid": "0000-0002-3156-6627", "clpid": "Macioce-Theodore-K" }, { "family_name": "Defrance", "given_name": "F.", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-Fabien" }, { "family_name": "Jung-Kubiak", "given_name": "C.", "orcid": "0000-0003-2745-6342", "clpid": "Jung-Kubiak-Cecile" }, { "family_name": "Rahiminejad", "given_name": "S.", "orcid": "0000-0001-8094-7189", "clpid": "Rahiminejad-Sofia" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Connors", "given_name": "J.", "orcid": "0000-0002-6094-2943", "clpid": "Connors-Jake" }, { "family_name": "Chattopadhyay", "given_name": "G.", "orcid": "0000-0001-7942-5025", "clpid": "Chattopadhyay-Goutam" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Radford", "given_name": "S. J. E.", "orcid": "0000-0001-9113-1660", "clpid": "Radford-Simon-J-E" } ], "abstract": "Future instruments employing cryogenic detectors for millimeter and submillimeter astronomy applications can benefit greatly from silicon vacuum windows with broadband antireflection treatment. Silicon is an ideal optical material at these wavelengths due to numerous attractive properties, including low loss, high refractive index, and high strength. However, its high index (n = 3.4) necessitates antireflection (AR) treatment, which has proven a major challenge, especially for the multilayer treatments required for wide spectral bandwidths. We address this challenge by developing a wide-bandwidth integral AR structure for silicon vacuum windows using a novel fabrication technique, tuning the effective refractive index of each AR layer using deep reactive ion etching (DRIE) and using wafer bonding to assemble the structure. We present the progress we have made in designing and fabricating such vacuum windows from 100-mm-diameter silicon wafers. We have previously demonstrated a two-layer AR structure for windows over a 1.6:1 bandwidth and are currently fabricating a four-layer coating designed for a 4:1 bandwidth. We have also converged on a design for a six-layer structure optimized to give \u2212 20 dB reflection between 80 and 420 GHz (5.25:1 bandwidth), which will be useful for future multicolor Sunyaev\u2013Zel'dovich (SZ) observations.", "doi": "10.1007/s10909-019-02294-4", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2020-05", "series_number": "3-4", "volume": "199", "issue": "3-4", "pages": "935-942" }, { "id": "authors:bjwva-hzy65", "collection": "authors", "collection_id": "bjwva-hzy65", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191114-154630277", "type": "article", "title": "Flat Low-Loss Silicon Gradient Index Lens for Millimeter and Submillimeter Wavelengths", "author": [ { "family_name": "Defrance", "given_name": "F.", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-Fabien" }, { "family_name": "Jung-Kubiak", "given_name": "C.", "orcid": "0000-0003-2745-6342", "clpid": "Jung-Kubiak-Cecile" }, { "family_name": "Rahiminejad", "given_name": "S.", "orcid": "0000-0001-8094-7189", "clpid": "Rahiminejad-Sofia" }, { "family_name": "Macioce", "given_name": "T.", "orcid": "0000-0002-3156-6627", "clpid": "Macioce-Theodore-K" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Connors", "given_name": "J.", "orcid": "0000-0002-6094-2943", "clpid": "Connors-Jake" }, { "family_name": "Radford", "given_name": "S. J. E.", "orcid": "0000-0001-9113-1660", "clpid": "Radford-Simon-J-E" }, { "family_name": "Chattopadhyay", "given_name": "G.", "orcid": "0000-0001-7942-5025", "clpid": "Chattopadhyay-Goutam" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "We present the design, simulation, and planned fabrication process of a flat high resistivity silicon gradient index (GRIN) lens for millimeter and submillimeter wavelengths with very low absorption losses. The gradient index is created by sub wavelength holes whose size increases with the radius of the lens. The effective refractive index created by the subwavelength holes is constant over a very wide bandwidth, allowing the fabrication of achromatic lenses up to submillimeter wavelengths. The designed GRIN lens was successfully simulated and shows an expected efficiency better than that of a classic silicon plano-concave spherical lens with approximately the same thickness and focal length. Deep reactive ion etching (DRIE) and wafer-bonding of several patterned wafers will be used to realize our first GRIN lens prototype.", "doi": "10.1007/s10909-019-02255-x", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2020-04", "series_number": "1-2", "volume": "199", "issue": "1-2", "pages": "376-383" }, { "id": "authors:n6mfp-4ns48", "collection": "authors", "collection_id": "n6mfp-4ns48", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200106-075205920", "type": "article", "title": "Constraints on dark photons and axionlike particles from the SuperCDMS Soudan experiment", "author": [ { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-Taylor-B" }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Cornell", "given_name": "B.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "We present an analysis of electron recoils in cryogenic germanium detectors operated during the SuperCDMS Soudan experiment. The data are used to set new constraints on the axioelectric coupling of axionlike particles and the kinetic mixing parameter of dark photons, assuming the respective species constitutes all of the galactic dark matter. This study covers the mass range from 40\u2009\u2009eV/c\u00b2 to 500\u2009\u2009keV/c\u00b2 for both candidates, excluding previously untested parameter space for masses below \u223c1\u2009\u2009keV/c\u00b2. For the kinetic mixing of dark photons, values below 10\u207b\u00b9\u2075 are reached for particle masses around 100\u2009\u2009eV/c\u00b2; for the axioelectric coupling of axionlike particles, values below 10\u207b\u00b9\u00b2 are reached for particles with masses in the range of a few-hundred eV/c\u00b2.", "doi": "10.1103/physrevd.101.052008", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2020-03-01", "series_number": "5", "volume": "101", "issue": "5", "pages": "Art. No. 052008" }, { "id": "authors:z8n0k-gx373", "collection": "authors", "collection_id": "z8n0k-gx373", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190724-092522268", "type": "article", "title": "Imaging the Thermal and Kinematic Sunyaev\u2013Zel'dovich Effect Signals in a Sample of 10 Massive Galaxy Clusters: Constraints on Internal Velocity Structures and Bulk Velocities", "author": [ { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Monta\u00f1a", "given_name": "Alfredo", "orcid": "0000-0003-4229-381X", "clpid": "Monta\u00f1a-A" }, { "family_name": "Mroczkowski", "given_name": "Tony", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "Wilson", "given_name": "Grant W.", "orcid": "0000-0003-2705-9152", "clpid": "Wilson-G-W" }, { "family_name": "Zemcov", "given_name": "Michael", "orcid": "0000-0001-8253-1451", "clpid": "Zemcov-M" }, { "family_name": "Zitrin", "given_name": "Adi", "orcid": "0000-0002-0350-4488", "clpid": "Zitrin-Adi" }, { "family_name": "Cibirka", "given_name": "Nath\u00e1lia", "orcid": "0000-0002-2356-4680", "clpid": "Cibirka-N" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hughes", "given_name": "David", "clpid": "Hughes-D" }, { "family_name": "Nagai", "given_name": "Daisuke", "orcid": "0000-0002-6766-5942", "clpid": "Nagai-Daisuke" }, { "family_name": "Reese", "given_name": "Erik D.", "orcid": "0000-0002-8700-7082", "clpid": "Reese-E-D" }, { "family_name": "S\u00e1nchez", "given_name": "David", "orcid": "0000-0002-7344-9920", "clpid": "S\u00e1nchez-D" }, { "family_name": "Zuhone", "given_name": "John", "orcid": "0000-0003-3175-2347", "clpid": "Zuhone-J" } ], "abstract": "

We have imaged the Sunyaev–Zel'dovich (SZ) effect signals at 140 and 270 GHz toward 10 galaxy clusters with Bolocam and AzTEC/ASTE. We also used Planck data to constrain the signal at large angular scales, Herschel–SPIRE images to subtract the brightest galaxies that comprise the cosmic infrared background (CIB), Chandra imaging to map the electron temperature T\u2091 of the intra-cluster medium, and Hubble Space Telescope imaging to derive models of each galaxy cluster's mass density. The galaxy clusters gravitationally lens the background CIB, which produced an on-average reduction in brightness toward the galaxy clusters' centers after the brightest galaxies were subtracted. We corrected for this deficit, which was between 5% and 25% of the 270 GHz SZ effect signal within R2500. Using the SZ effect measurements, along with the X-ray constraint on T\u2091, we measured each galaxy cluster's average line of sight (LOS) velocity vz within R2500, with a median per-cluster uncertainty of ±700 km s−1. We found an ensemble-mean \u27e8vz\u27e9 of 430 ± 210 km s−1, and an intrinsic cluster-to-cluster scatter σ\u1d62\u2099\u209c of 470 ± 340 km s−1. We also obtained maps of vz over each galaxy cluster's face with an angular resolution of 70''. All four galaxy clusters previously identified as having a merger oriented along the LOS showed an excess variance in these maps at a significance of \u22432–4σ, indicating an internal vz rms of \u22731000 km s−1. None of the six galaxy clusters previously identified as relaxed or plane-of-sky mergers showed any such excess variance.

", "doi": "10.3847/1538-4357/ab29ef", "issn": "1538-4357", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2019-07-20", "series_number": "1", "volume": "880", "issue": "1", "pages": "45" }, { "id": "authors:qy5fs-9v379", "collection": "authors", "collection_id": "qy5fs-9v379", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190315-081353179", "type": "article", "title": "Search for low-mass dark matter with CDMSlite using a profile likelihood fit", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-T" }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Cornell", "given_name": "B.", "clpid": "Cornell-B" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) searches for interactions between dark matter particles and germanium nuclei in cryogenic detectors. The experiment has achieved a low energy threshold with improved sensitivity to low-mass (<10\u2009\u2009GeV/c^2) dark matter particles. We present an analysis of the final CDMSlite dataset, taken with a different detector than was used for the two previous CDMSlite datasets. This analysis includes a data \"salting\" method to protect against bias, improved noise discrimination, background modeling, and the use of profile likelihood methods to search for a dark matter signal in the presence of backgrounds. We achieve an energy threshold of 70 eV and significantly improve the sensitivity for dark matter particles with masses between 2.5 and 10\u2009\u2009GeV/c^2 compared to previous analyses. We set an upper limit on the dark matter-nucleon scattering cross section in germanium of 5.4\u00d710^(-42)\u2009\u2009cm^2 at 5\u2009\u2009GeV/c^2, a factor of \u223c2.5 improvement over the previous CDMSlite result.", "doi": "10.1103/PhysRevD.99.062001", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2019-03-15", "series_number": "6", "volume": "99", "issue": "6", "pages": "Art. No. 062001" }, { "id": "authors:csgnv-k4m38", "collection": "authors", "collection_id": "csgnv-k4m38", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180814-110030986", "type": "article", "title": "Production Rate Measurement of Tritium and Other Cosmogenic Isotopes in Germanium with CDMSlite", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-T" }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Cornell", "given_name": "B.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "Future direct searches for low-mass dark matter particles with germanium detectors, such as SuperCDMS SNOLAB, are expected to be limited by backgrounds from radioactive isotopes activated by cosmogenic radiation inside the germanium. There are limited experimental data available to constrain production rates and a large spread of theoretical predictions. We examine the calculation of expected production rates, and analyze data from the second run of the CDMS low ionization threshold experiment (CDMSlite) to estimate the rates for several isotopes. We model the measured CDMSlite spectrum and fit for contributions from tritium and other isotopes. Using the knowledge of the detector history, these results are converted to cosmogenic production rates at sea level. The production rates in atoms/(kg\u202f\u00b7\u202fday) are 74 \u202f\u00b1\u202f 9 for ^3H, 1.5 \u202f\u00b1\u202f 0.7 for ^(55)Fe, 17 \u202f\u00b1\u202f 5 for ^(65)Zn, and 30 \u202f\u00b1\u202f 18 for ^(68)Ge.", "doi": "10.1016/j.astropartphys.2018.08.006", "issn": "0927-6505", "publisher": "Elsevier", "publication": "Astroparticle Physics", "publication_date": "2019-01", "volume": "104", "pages": "1-12" }, { "id": "authors:paec2-2sv12", "collection": "authors", "collection_id": "paec2-2sv12", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180410-082632508", "type": "article", "title": "Development of a Massive, Highly Multiplexible, Phonon-Mediated Particle Detector Using Kinetic Inductance Detectors", "author": [ { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-T" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-Bruce" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "We present a status update on the development of a phonon-mediated particle detector using kinetic inductance detector (KID). The design is intended for O(1) kg substrate, using O(10^2)KIDs on a single readout line, to image the athermal phonon distribution at < 1 mm position resolution and O(10) eV energy resolution. The design specification is set by the need to improve position reconstruction fidelity while maintaining low energy threshold for future rare-event searches such as for low-mass dark matter. We report on the design, which shows negligible crosstalk and > 95% inductor current uniformity, using the coplanar waveguide feedline, ground shield, and a new class of KIDs with symmetric coplanar stripline (sCPS) inductor. The multiplexing is designed upon the frequency-geometry relation we develop for the sCPS KIDs. We introduce the fabrications of the Nb RF assessment prototypes and the high phonon collection efficiency Al\u2013Nb devices. We achieve \u2272 0.07% frequency displacement on a 80-KID RF assessment prototype, and the result indicates that we may place more than 180 resonances in our 0.4 GHz readout band with minimal frequency misordering. The coupling quality factors are \u223c 10^5 as designed. Finally, we update our work in progress in fabricating the O(10^2) KID, bi-material, O(1) kg detectors, and the expected position and energy resolutions.", "doi": "10.1007/s10909-018-1900-9", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2018-12", "series_number": "5-6", "volume": "193", "issue": "5-6", "pages": "1199-1205" }, { "id": "authors:st3gm-x1k31", "collection": "authors", "collection_id": "st3gm-x1k31", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181129-112744239", "type": "article", "title": "Thermodynamic profiles of galaxy clusters from a joint X-ray/SZ analysis", "author": [ { "family_name": "Shitanishi", "given_name": "Jennifer A.", "clpid": "Shitanishi-Jennifer-A" }, { "family_name": "Pierpaoli", "given_name": "Elena", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Ameglio", "given_name": "Silvia", "clpid": "Ameglio-Silvia" }, { "family_name": "Mantz", "given_name": "Adam B.", "orcid": "0000-0002-8031-1217", "clpid": "Mantz-A-B" }, { "family_name": "Mroczkowski", "given_name": "Tony K.", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "Rasia", "given_name": "Elena", "orcid": "0000-0003-4175-002X", "clpid": "Rasia-Elena" }, { "family_name": "Siegel", "given_name": "Seth", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" } ], "abstract": "

We jointly analyse the Bolocam Sunyaev–Zel’dovich (SZ) effect and Chandra X-ray data for a set of 45 clusters to derive gas density and temperature profiles without using spectroscopic information. The sample spans the mass and redshift range 3×1014 M\u2609 ≤ M\u2085\u2080\u2080 ≤ 25 × 1014 M\u2609 and 0.15 ≤ z ≤ 0.89. We define cool-core and non-cool core subsamples based on the central X-ray luminosity, and 17 out of 45 clusters are classified as cool core. In general, the profiles derived from our analysis are found to be in good agreement with previous analyses, and profile constraints beyond r500 are obtained for 34 out of 45 clusters. In approximately 30 per cent of the cool-core clusters, our analysis shows a central temperature drop with a statistical significance of >3σ; this modest detection fraction is due mainly to a combination of coarse angular resolution and modest signal-to-noise ratio in the SZ data. Most clusters are consistent with an isothermal profile at the largest radii near r500, although 10 out of 45 show a significant temperature decrease with increasing radius. The sample mean density profile is in good agreement with previous studies, and shows a minimum intrinsic scatter of approximately 10 per cent near 0.5r500. The sample mean temperature profile is consistent with isothermal, and has an intrinsic scatter of approximately 50 per cent  independent of radius. This scatter is significantly higher compared to earlier X-ray-only studies, which find intrinsic scatters near 10 per cent , likely due to a combination of unaccounted-for non-idealities in the SZ noise, projection effects, and sample selection.

", "doi": "10.1093/mnras/sty2195", "issn": "0035-8711", "publisher": "Royal Astronomical Society", "publication": "Monthly Notices of the Royal Astronomical Society", "publication_date": "2018-11-21", "series_number": "1", "volume": "481", "issue": "1", "pages": "749-792" }, { "id": "authors:rz726-g3024", "collection": "authors", "collection_id": "rz726-g3024", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180723-100931564", "type": "article", "title": "Nuclear-recoil energy scale in CDMS II silicon dark-matter detectors", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Cornell", "given_name": "B.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" } ], "abstract": "The Cryogenic Dark Matter Search (CDMS II) experiment aims to detect dark matter particles that elastically scatter from nuclei in semiconductor detectors. The resulting nuclear-recoil energy depositions are detected by ionization and phonon sensors. Neutrons produce a similar spectrum of low-energy nuclear recoils in such detectors, while most other backgrounds produce electron recoils. The absolute energy scale for nuclear recoils is necessary to interpret results correctly. The energy scale can be determined in CDMS II silicon detectors using neutrons incident from a broad-spectrum ^(252)Cf source, taking advantage of a prominent resonance in the neutron elastic scattering cross section of silicon at a recoil (neutron) energy near 20 (182) keV. Results indicate that the phonon collection efficiency for nuclear recoils is 4.8_(\u22120.9)^(+0.7)% lower than for electron recoils of the same energy. Comparisons of the ionization signals for nuclear recoils to those measured previously by other groups at higher electric fields indicate that the ionization collection efficiency for CDMS II silicon detectors operated at \u223c4 V/cm is consistent with 100% for nuclear recoils below 20 keV and gradually decreases for larger energies to \u223c75% at 100 keV. The impact of these measurements on previously published CDMS II silicon results is small.", "doi": "10.1016/j.nima.2018.07.028", "issn": "0168-9002", "publisher": "Elsevier", "publication": "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment", "publication_date": "2018-10-11", "volume": "905", "pages": "71-81" }, { "id": "authors:j7k0a-qfb13", "collection": "authors", "collection_id": "j7k0a-qfb13", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180827-094621698", "type": "article", "title": "Energy loss due to defect formation from ^(206)Pb recoils in SuperCDMS germanium detectors", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-T" }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Cornell", "given_name": "B.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "The Super Cryogenic Dark Matter Search experiment at the Soudan Underground Laboratory studied energy loss associated with defect formation in germanium crystals at mK temperatures using in situ ^(210)Pb sources. We examine the spectrum of ^(206)Pb nuclear recoils near its expected 10^3\u2009keV endpoint energy and determine an energy loss of (6:08\u2009\u00b1\u20090:18)%, which we attribute to defect formation. From this result and using TRIM simulations, we extract the first experimentally determined average displacement threshold energy of 19.7^(+0.6)_(\u22120.5) eV for germanium. This has implications for the analysis thresholds of future germanium-based dark matter searches.", "doi": "10.1063/1.5041457", "issn": "0003-6951", "publisher": "American Institute of Physics", "publication": "Applied Physics Letters", "publication_date": "2018-08-27", "series_number": "9", "volume": "113", "issue": "9", "pages": "Art. No. 092101" }, { "id": "authors:rmshc-y1751", "collection": "authors", "collection_id": "rmshc-y1751", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180618-094624240", "type": "article", "title": "First Dark Matter Constraints from SuperCDMS Single-Charge Sensitive Detectors", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Aralis", "given_name": "T.", "clpid": "Aralis-T" }, { "family_name": "Chang", "given_name": "Y.-Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Cornell", "given_name": "B.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "We present the first limits on inelastic electron-scattering dark matter and dark photon absorption using a prototype SuperCDMS detector having a charge resolution of 0.1 electron-hole pairs (CDMS HVeV, a 0.93 g CDMS high-voltage device). These electron-recoil limits significantly improve experimental constraints on dark matter particles with masses as low as 1\u2009\u2009MeV/c^2. We demonstrate a sensitivity to dark photons competitive with other leading approaches but using substantially less exposure (0.49 g d). These results demonstrate the scientific potential of phonon-mediated semiconductor detectors that are sensitive to single electronic excitations.", "doi": "10.1103/PhysRevLett.121.051301", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2018-08-03", "series_number": "5", "volume": "121", "issue": "5", "pages": "Art. No. 051301" }, { "id": "authors:ace0v-nwp58", "collection": "authors", "collection_id": "ace0v-nwp58", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190823-134014637", "type": "book_section", "title": "Multilayer antireflection coating for silicon optics at millimeter and submillimeter wavelengths (Conference Presentation)", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX", "author": [ { "family_name": "Defrance", "given_name": "Fabien", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-F" }, { "family_name": "Chattopadhyay", "given_name": "Goutam", "orcid": "0000-0001-7942-5025", "clpid": "Chattopadhyay-G" }, { "family_name": "Connors", "given_name": "Jake", "clpid": "Connors-Jake" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "Matthew", "clpid": "Hollister-M-I" }, { "family_name": "Jung-Kubiak", "given_name": "Cecile", "clpid": "Jung-Kubiak-C" }, { "family_name": "Padilla", "given_name": "Estefania", "clpid": "Padilla-E" }, { "family_name": "Radford", "given_name": "Simon", "clpid": "Radford-S-J-E" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Tong", "given_name": "Edward C.", "clpid": "Tong-Edward-C" }, { "family_name": "Yoshida", "given_name": "Hiroshige", "clpid": "Yoshida-Hiroshige" } ], "contributor": [ { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" }, { "family_name": "Gao", "given_name": "Jian-Rong", "clpid": "Gao-Jian-Rong" } ], "abstract": "Many applications in astronomy from tens of GHz to THz frequencies, on the ground and in space, would benefit from silicon optics because silicon's high refractive index and low loss make it an ideal optical material at these frequencies. Silicon can also be used for ambient temperature vacuum windows, however, it's large refractive index necessitates an antireflection coating. Moreover, multilayer antireflection treatments are necessary for wide spectral bandwidths, with wider bandwidths requiring more layers. To this end, we are developing multilayer coatings for silicon by bonding together wafers individually patterned with deep reactive ion etching (DRIE). While a standard approach to antireflection coating is to deposit or laminate dielectric layers of appropriate refractive index, it is difficult (but not impossible) to find low loss dielectrics with the correct refractive index and other properties to match silicon well, especially if more than one layer is required, operation up to THz frequencies is desired, and/or the optic will be used cryogenically. Textured surfaces are an attractive alternative to dielectric antireflection coatings. For millimeter wavelengths, multi-layer antireflection textures with up to 4:1 bandwidths have been cut successfully into silicon lens surfaces with a dicing saw, but this technique becomes unusable at frequencies of 300 GHz and higher given the saw dimensions. Laser machining is being explored but demonstrations are not yet available. DRIE works well on flat surfaces (and has been demonstrated for narrowband windows to THz frequencies), but there are limits to the depth and aspect ratio of the features it can create. Furthermore, etching has not been adapted to large, curved optics. We are pursuing a hybrid approach to this problem: construct a silicon optic by stacking flat patterned wafers. The starting point is a multilayer optical design incorporating both an axial gradient in the refractive index for antireflection and a radial index gradient for focusing. For each optical layer, a hole or post pattern is used to achieve the required effective index of refraction. Using a novel multilayer etching procedure, several layers of the optical structure are fabricated on a flat wafer. Several individually patterned wafers are stacked and bonded together to produce the completed optic. This approach can thus address the aspect ratio limitations of DRIE, and it obviates etching on curved surfaces. We present our results to date, which include simulations, fabrication and measurements of 2- and 4-layer coatings with wafer-bonding, on high resistivity silicon wafers, at 75-330 GHz. The good agreement between the simulations and the test results validates the fabrication and test setup, and allows us to continue the development of larger bandwidth and more efficient coatings. Our near-term goal is to produce a 10-cm lens with a 7-layer coating providing 5.5:1 bandwidth from 75 to 420 GHz, with less than 1% reflection, eventually scaling up to 15-cm, 30-cm, and larger elements.", "doi": "10.1117/12.2315785", "isbn": "9781510619692", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2018-07-10", "pages": "Art. No. 107081F" }, { "id": "authors:dv37e-0qt96", "collection": "authors", "collection_id": "dv37e-0qt96", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170601-094159097", "type": "article", "title": "Constraints on the Mass, Concentration, and Nonthermal Pressure Support of Six CLASH Clusters from a Joint Analysis of X-ray, SZ, and Lensing Data", "author": [ { "family_name": "Siegel", "given_name": "Seth R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Mahdavi", "given_name": "Andisheh", "orcid": "0000-0002-8111-3343", "clpid": "Mahdavi-Andisheh" }, { "family_name": "Donahue", "given_name": "Megan", "orcid": "0000-0002-2808-0853", "clpid": "Donahue-Megan" }, { "family_name": "Merten", "given_name": "Julian", "clpid": "Merten-Julian-C" }, { "family_name": "Zitrin", "given_name": "Adi", "orcid": "0000-0002-0350-4488", "clpid": "Zitrin-Adi" }, { "family_name": "Meneghetti", "given_name": "Massimo", "orcid": "0000-0003-1225-7084", "clpid": "Meneghetti-Massimo" }, { "family_name": "Umetsu", "given_name": "Keiichi", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" }, { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Postman", "given_name": "Marc", "orcid": "0000-0002-9365-7989", "clpid": "Postman-Marc" }, { "family_name": "Koch", "given_name": "Patrick M.", "orcid": "0000-0003-2777-5861", "clpid": "Koch-P-M" }, { "family_name": "Koekemoer", "given_name": "Anton M.", "orcid": "0000-0002-6610-2048", "clpid": "Koekemoer-A-M" }, { "family_name": "Lin", "given_name": "Kai-Yang", "orcid": "0000-0002-8698-7277", "clpid": "Lin-Kai-Yang" }, { "family_name": "Melchior", "given_name": "Peter", "orcid": "0000-0002-8873-5065", "clpid": "Melchior-Peter" }, { "family_name": "Molnar", "given_name": "Sandor M.", "orcid": "0000-0002-4227-956X", "clpid": "Molnar-S-M" }, { "family_name": "Moustakas", "given_name": "Leonidas", "orcid": "0000-0003-3030-2360", "clpid": "Moustakas-L-A" }, { "family_name": "Mroczkowski", "given_name": "Tony K.", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "Pierpaoli", "given_name": "Elena", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Shitanishi", "given_name": "Jennifer A.", "clpid": "Shitanishi-Jennifer-A" } ], "abstract": "We present a joint analysis of Chandra X-ray observations, Bolocam thermal Sunyaev\u2013Zel'dovich (SZ) effect observations, Hubble Space Telescope (HST) strong-lensing data, and HST and Subaru Suprime-Cam weak-lensing data. The multiwavelength data set is used to constrain parametric models for the distribution of dark and baryonic matter in a sample of six massive galaxy clusters selected from the Cluster Lensing And Supernova survey with Hubble (CLASH). For five of the six clusters, the multiwavelength data set is well described by a relatively simple model that assumes spherical symmetry, hydrostatic equilibrium, and entirely thermal pressure support. The joint analysis yields considerably better constraints on the total mass and concentration of the clusters compared to analysis of any one data set individually. The resulting constraints are consistent with simulation-based predictions for the concentration\u2013mass relation. The subsample of five galaxy clusters is used to place an upper limit on the fraction of pressure support in the intracluster medium (ICM) due to nonthermal processes, such as turbulence and bulk flow of the gas. We constrain the nonthermal pressure fraction at r_(500c) to be <0.11 at 95% confidence. This is in tension with state-of-the-art hydrodynamical simulations, which predict a nonthermal pressure fraction of \u22480.25 at r_(500c) for clusters of similar mass and redshift. This tension may be explained by the sample selection and/or our assumption of spherical symmetry.", "doi": "10.3847/1538-4357/aac5f8", "issn": "1538-4357", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2018-07-01", "series_number": "1", "volume": "861", "issue": "1", "pages": "Art. No. 71" }, { "id": "authors:tza2e-3qw60", "collection": "authors", "collection_id": "tza2e-3qw60", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180705-143644278", "type": "article", "title": "1.6:1 bandwidth two-layer antireflection structure for silicon matched to the 190\u2013310\u2009\u2009GHz atmospheric window", "author": [ { "family_name": "Defrance", "given_name": "Fabien", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-F" }, { "family_name": "Jung-Kubiak", "given_name": "Cecile", "clpid": "Jung-Kubiak-C" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Connors", "given_name": "Jake", "clpid": "Connors-Jake" }, { "family_name": "deYoung", "given_name": "Clare", "clpid": "deYoung-C" }, { "family_name": "Hollister", "given_name": "Matthew I.", "clpid": "Hollister-M-I" }, { "family_name": "Yoshida", "given_name": "Hiroshige", "clpid": "Yoshida-Hiroshige" }, { "family_name": "Chattopadhyay", "given_name": "Goutam", "orcid": "0000-0001-7942-5025", "clpid": "Chattopadhyay-G" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Radford", "given_name": "Simon J. E.", "clpid": "Radford-S-J-E" } ], "abstract": "

Although high-resistivity, low-loss silicon is an excellent material for terahertz transmission optics, its high refractive index necessitates an antireflection treatment. We fabricated a wide-bandwidth, two-layer antireflection treatment by cutting subwavelength structures into the silicon surface using multi-depth deep reactive-ion etching (DRIE). A wafer with this treatment on both sides has <−20 dB<−20 dB (<1%<1%) reflectance over 187–317 GHz at a 15° angle of incidence in TE polarization. We also demonstrated that bonding wafers introduce no reflection features above the −20 dB−20 dB level (also in TE at 15°), reproducing previous work. Together these developments immediately enable construction of wide-bandwidth silicon vacuum windows and represent two important steps toward gradient-index silicon optics with integral broadband antireflection treatment.

", "doi": "10.1364/AO.57.005196", "issn": "0003-6935", "publisher": "Optical Society of America", "publication": "Applied Optics", "publication_date": "2018-06-20", "series_number": "18", "volume": "57", "issue": "18", "pages": "5196-5209" }, { "id": "authors:0b103-2d030", "collection": "authors", "collection_id": "0b103-2d030", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190107-095816933", "type": "monograph", "title": "Stacked Wafer Gradient Index Silicon Optics with Integral Anti-reflection Layers", "author": [ { "family_name": "Defrance", "given_name": "F.", "orcid": "0000-0002-3746-5296", "clpid": "Defrance-F" }, { "family_name": "Chattopadhyay", "given_name": "G.", "orcid": "0000-0001-7942-5025", "clpid": "Chattopadhyay-G" }, { "family_name": "Connors", "given_name": "J.", "clpid": "Connors-J" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "M. I.", "clpid": "Hollister-M-I" }, { "family_name": "Jung-Kubiak", "given_name": "C.", "clpid": "Jung-Kubiak-C" }, { "family_name": "Padilla", "given_name": "E.", "clpid": "Padilla-E" }, { "family_name": "Radford", "given_name": "S.", "clpid": "Radford-S-J-E" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Tong", "given_name": "E. C.", "clpid": "Tong-E-C" }, { "family_name": "Yoshida", "given_name": "H.", "clpid": "Yoshida-Hiroshige" } ], "abstract": "Silicon optics with wide bandwidth anti-reflection (AR) coatings, made of multi-layer textured silicon surfaces, are developed for millimeter and submillimeter wavelengths. Single and double layer AR coatings were designed for an optimal transmission centered on 250 GHz, and fabricated using the DRIE (Deep Reaction Ion Etching) technique. Tests of high resistivity silicon wafers with single-layer coatings between 75 GHz and 330 GHz are presented and compared with the simulations.", "doi": "10.48550/arXiv.1802.04854", "publisher": "arXiv", "publication_date": "2018-02-13" }, { "id": "authors:kycdn-exk20", "collection": "authors", "collection_id": "kycdn-exk20", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180209-102230885", "type": "article", "title": "Results from the Super Cryogenic Dark Matter Search Experiment at Soudan", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Chang", "given_name": "Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "We report the result of a blinded search for weakly interacting massive particles (WIMPs) using the majority of the SuperCDMS Soudan data set. With an exposure of 1690 kg\u2009d, a single candidate event is observed, consistent with expected backgrounds. This analysis (combined with previous Ge results) sets an upper limit on the spin-independent WIMP\u2013nucleon cross section of 1.4 \u00d7 10^(\u221244) (1.0 \u00d7 10^(\u221244) cm^2 at 46 GeV/c^2. These results set the strongest limits for WIMP\u2013germanium-nucleus interactions for masses > 12 GeV/c^2.", "doi": "10.1103/PhysRevLett.120.061802", "issn": "0031-899X", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2018-02-09", "series_number": "6", "volume": "120", "issue": "6", "pages": "Art. No. 061802" }, { "id": "authors:pqzhg-82616", "collection": "authors", "collection_id": "pqzhg-82616", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180117-142750988", "type": "article", "title": "Low-mass dark matter search with CDMSlite", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Aramaki", "given_name": "T.", "clpid": "Aramaki-T" }, { "family_name": "Chang", "given_name": "Y.", "orcid": "0000-0002-6441-980X", "clpid": "Chang-Yen-Yung" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "The SuperCDMS experiment is designed to directly detect weakly interacting massive particles (WIMPs) that may constitute the dark matter in our Galaxy. During its operation at the Soudan Underground Laboratory, germanium detectors were run in the CDMSlite mode to gather data sets with sensitivity specifically for WIMPs with masses \n< 10 GeV/c^2. In this mode, a higher detector-bias voltage is applied to amplify the phonon signals produced by drifting charges. This paper presents studies of the experimental noise and its effect on the achievable energy threshold, which is demonstrated to be as low as \n56 eV_ee (electron equivalent energy). The detector-biasing configuration is described in detail, with analysis corrections for voltage variations to the level of a few percent. Detailed studies of the electric-field geometry, and the resulting successful development of a fiducial parameter, eliminate poorly measured events, yielding an energy resolution ranging from \u223c9 e V_(ee) at 0 keV to \n101 e V_(ee) at \u223c 10 ke V_(ee). New results are derived for astrophysical uncertainties relevant to the WIMP-search limits, specifically examining how they are affected by variations in the most probable WIMP velocity and the Galactic escape velocity. These variations become more mportant for WIMP masses below 10 Ge V /c^2. Finally, new limits on spin-dependent low-mass WIMP-nucleon interactions are derived, with new parameter space excluded for WIMP masses \u2272 3 Ge V /c^2.", "doi": "10.1103/PhysRevD.97.022002", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2018-01-15", "series_number": "2", "volume": "97", "issue": "2", "pages": "Art. No. 022002" }, { "id": "authors:e221y-5vh75", "collection": "authors", "collection_id": "e221y-5vh75", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170410-092618496", "type": "article", "title": "Projected sensitivity of the SuperCDMS SNOLAB experiment", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "SuperCDMS SNOLAB will be a next-generation experiment aimed at directly detecting low-mass particles (with masses \u2264 10 GeV/c^2) that may constitute dark matter by using cryogenic detectors of two types (HV and iZIP) and two target materials (germanium and silicon). The experiment is being designed with an initial sensitivity to nuclear recoil cross sections \u223c 1\u00d710^(\u221243) cm^2 for a dark matter particle mass of 1 GeV/c^2, and with capacity to continue exploration to both smaller masses and better sensitivities. The phonon sensitivity of the HV detectors will be sufficient to detect nuclear recoils from sub-GeV dark matter. A detailed calibration of the detector response to low-energy recoils will be needed to optimize running conditions of the HV detectors and to interpret their data for dark matter searches. Low-activity shielding, and the depth of SNOLAB, will reduce most backgrounds, but cosmogenically produced ^3H and naturally occurring ^(32)Si will be present in the detectors at some level. Even if these backgrounds are 10 times higher than expected, the science reach of the HV detectors would be over 3 orders of magnitude beyond current results for a dark matter mass of 1 GeV/c^2. The iZIP detectors are relatively insensitive to variations in detector response and backgrounds, and will provide better sensitivity for dark matter particles with masses \u2273 5 GeV/c^2. The mix of detector types (HV and iZIP), and targets (germanium and silicon), planned for the experiment, as well as flexibility in how the detectors are operated, will allow us to maximize the low-mass reach, and understand the backgrounds that the experiment will encounter. Upgrades to the experiment, perhaps with a variety of ultra-low-background cryogenic detectors, will extend dark matter sensitivity down to the \"neutrino floor,\" where coherent scatters of solar neutrinos become a limiting background.", "doi": "10.1103/PhysRevD.95.082002", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2017-04-15", "series_number": "8", "volume": "95", "issue": "8", "pages": "Art. No. 082002" }, { "id": "authors:rtr8h-cbp48", "collection": "authors", "collection_id": "rtr8h-cbp48", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170329-124336693", "type": "article", "title": "Galaxy Cluster Pressure Profiles as Determined by Sunyaev Zel'dovich Effect Observations with MUSTANG and Bolocam. II. Joint Analysis of 14 Clusters", "author": [ { "family_name": "Romero", "given_name": "Charles E.", "clpid": "Romero-Charles-E" }, { "family_name": "Mason", "given_name": "Brian S.", "clpid": "Mason-Brian-S" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Mroczkowski", "given_name": "Tony", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-Anthony-K" }, { "family_name": "Sarazin", "given_name": "Craig", "clpid": "Sarazin-Craig" }, { "family_name": "Donahue", "given_name": "Megan", "orcid": "0000-0002-2808-0853", "clpid": "Donahue-Megan" }, { "family_name": "Baldi", "given_name": "Alessandro", "clpid": "Baldi-Alessandro" }, { "family_name": "Clarke", "given_name": "Tracy E.", "clpid": "Clarke-Tracy-E" }, { "family_name": "Young", "given_name": "Alexander H.", "orcid": "0000-0003-2291-6952", "clpid": "Young-Alexander-H" }, { "family_name": "Sievers", "given_name": "Jonathan", "orcid": "0000-0001-6903-5074", "clpid": "Sievers-Jonathan" }, { "family_name": "Dicker", "given_name": "Simon R.", "clpid": "Dicker-Simon-R" }, { "family_name": "Reese", "given_name": "Erik D.", "orcid": "0000-0002-8700-7082", "clpid": "Reese-Erik-D" }, { "family_name": "Czakon", "given_name": "Nicole", "clpid": "Czakon-Nicole-G" }, { "family_name": "Devlin", "given_name": "Mark", "orcid": "0000-0002-3169-9761", "clpid": "Devlin-Mark-J" }, { "family_name": "Korngut", "given_name": "Phillip M.", "clpid": "Korngut-Phillip-M" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "We present pressure profiles of galaxy clusters determined from high-resolution Sunyaev\u2013Zel'dovich (SZ) effect observations of 14 clusters, which span the redshift range of 0.25 < z < 0.89. The procedure simultaneously fits spherical cluster models to MUSTANG and Bolocam data. In this analysis, we adopt the generalized NFW parameterization of pressure profiles to produce our models. Our constraints on ensemble-average pressure profile parameters, in this study \u03b3, C_(500), and P_0, are consistent with those in previous studies, but for individual clusters we find discrepancies with the X-ray derived pressure profiles from the ACCEPT2 database. We investigate potential sources of these discrepancies, especially cluster geometry, electron temperature of the intracluster medium, and substructure. We find that the ensemble mean profile for all clusters in our sample is described by the parameters [\u03b3, C_(500), P_0] = [0.3^(+0.1)_(-0.1), 1.3^(+0.1)_(-0.1), 8.6^(+2.4)_(-2.4)], cool core clusters are described by [\u03b3, C_(500), P_0] = [0.6^(+0.1)_(-0.1), 0.9^(+0.1)_(-0.1), 3.6^+(1.5)_(-1.5)], and disturbed clusters are described by [\u03b3, C_(500), P_0] = [0.0^(+0.1)_(-0.0), 1.5^(+0.1)_(-0.2), 13.8^(+1.6)_(-1.6)]. Of the 14 clusters, 4 have clear substructure in our SZ observations, while an additional 2 clusters exhibit potential substructure.", "doi": "10.3847/1538-4357/aa643f", "issn": "1538-4357", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2017-04-01", "series_number": "2", "volume": "838", "issue": "2", "pages": "Art. No. 86" }, { "id": "authors:0ykd1-w6j44", "collection": "authors", "collection_id": "0ykd1-w6j44", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170524-164519696", "type": "book_section", "title": "Antireflective textured silicon optics at millimeter and submillimeter wavelengths", "book_title": "11th European Conference on Antennas and Propagation (EUCAP)", "author": [ { "family_name": "Jung-Kubiak", "given_name": "Cecile", "clpid": "Jung-Kubiak-C" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Hollister", "given_name": "Matthew I.", "clpid": "Hollister-M-I" }, { "family_name": "Bose", "given_name": "Arjun", "clpid": "Bose-Arjun" }, { "family_name": "Yoshida", "given_name": "Hiroshige", "clpid": "Yoshida-Hiroshige" }, { "family_name": "Liao", "given_name": "Luke", "clpid": "Liao-Luke" }, { "family_name": "Wong", "given_name": "Jonathan", "clpid": "Wong-Jonathan-R" }, { "family_name": "Radford", "given_name": "Simon", "clpid": "Radford-S-J-E" }, { "family_name": "Chattopadhyay", "given_name": "Goutam", "orcid": "0000-0001-7942-5025", "clpid": "Chattopadhyay-Goutam" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "Silicon optics with broadband antireflective (AR) treatments are being developed for millimeter and submillimeter-wave applications. Combined photolithography and deep reactive ion etching (DRIE) techniques are used to texture the surfaces of high resistivity, low loss silicon wafers. We report on the design, fabrication, and testing at 250 GHz of single and double layer AR treatments on silicon optics.", "doi": "10.23919/EuCAP.2017.7928608", "isbn": "978-8-8907-0187-0", "publisher": "IEEE", "place_of_publication": "Piscataway, NJ", "publication_date": "2017-03", "pages": "955-961" }, { "id": "authors:9217r-qh768", "collection": "authors", "collection_id": "9217r-qh768", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161116-143046755", "type": "article", "title": "A Comparison and Joint Analysis of Sunyaev-Zel'dovich Effect Measurements from Planck and Bolocam for a set of 47 Massive Galaxy Clusters", "author": [ { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Mantz", "given_name": "Adam B.", "orcid": "0000-0002-8031-1217", "clpid": "Mantz-A-B" }, { "family_name": "Merten", "given_name": "Julian", "clpid": "Merten-Julian-C" }, { "family_name": "Molnar", "given_name": "Sandor M.", "orcid": "0000-0002-4227-956X", "clpid": "Molnar-S-M" }, { "family_name": "Naka", "given_name": "Michael", "clpid": "Naka-Michael" }, { "family_name": "Pailet", "given_name": "Gregory", "clpid": "Pailet-Gregory" }, { "family_name": "Pierpaoli", "given_name": "Elena", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Siegel", "given_name": "Seth R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Wolman", "given_name": "Ben", "clpid": "Wolman-Ben" } ], "abstract": "

We measure the Sunyaev–Zel'dovich (SZ) signal toward a set of 47 clusters with a median mass of 9.5 × 1014 M\u2609 and a median redshift of 0.40 using data from Planck and the ground-based Bolocam receiver. When Planck XMM-like masses are used to set the scale radius θ\u209b, we find consistency between the integrated SZ signal, Y\u2085\u1d63\u2085\u2080\u2080, derived from Bolocam and Planck based on generalized Navarro, Frenk, and White model fits using A10 shape parameters, with an average ratio of 1.069 ± 0.030 (allowing for the \u22435% Bolocam flux calibration uncertainty). We also perform a joint fit to the Bolocam and Planck data using a modified A10 model with the outer logarithmic slope β allowed to vary, finding β = 6.13 ± 0.16 ± 0.76 (measurement error followed by intrinsic scatter). In addition, we find that the value of β scales with mass and redshift according to β ∝ M^(0.077 ± 0.0260) × (1 + z)^(−0.06 ± 0.09). This mass scaling is in good agreement with recent simulations. We do not observe the strong trend of β with redshift seen in simulations, though we conclude that this is most likely due to our sample selection. Finally, we use Bolocam measurements of Y500 to test the accuracy of the Planck completeness estimate. We find consistency, with the actual number of Planck detections falling approximately 1σ below the expectation from Bolocam. We translate this small difference into a constraint on the effective mass bias for the Planck cluster cosmology results, with (1 − b) = 0.93 ± 0.06.

", "doi": "10.3847/0004-637X/832/1/26", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2016-11-20", "series_number": "1", "volume": "832", "issue": "1", "pages": "Art. No. 26" }, { "id": "authors:rxj8y-c7867", "collection": "authors", "collection_id": "rxj8y-c7867", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161027-113611655", "type": "article", "title": "HerMES: a search for high-redshift dusty galaxies in the HerMES Large Mode Survey \u2013 catalogue, number counts and early results", "author": [ { "family_name": "Asboth", "given_name": "V.", "clpid": "Asboth-V" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Cooray", "given_name": "A.", "orcid": "0000-0002-3892-0190", "clpid": "Cooray-A" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Siegel", "given_name": "S. R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" } ], "abstract": "

Selecting sources with rising flux densities towards longer wavelengths from Herschel/Spectral and Photometric Imaging Receiver (SPIRE) maps is an efficient way to produce a catalogue rich in high-redshift (z > 4) dusty star-forming galaxies. The effectiveness of this approach has already been confirmed by spectroscopic follow-up observations, but the previously available catalogues made this way are limited by small survey areas. Here we apply a map-based search method to 274 deg2 of the Herschel Multi-tiered Extragalactic Survey (HerMES) Large Mode Survey and create a catalogue of 477 objects with SPIRE flux densities S500 > S350 > S250 and a 5σ cut-off S500 > 52 mJy. From this catalogue we determine that the total number of these ‘red’ sources is at least an order of magnitude higher than predicted by galaxy evolution models. These results are in agreement with previous findings in smaller HerMES fields; however, due to our significantly larger sample size we are also able to investigate the shape of the red source counts for the first time. We have obtained spectroscopic redshift measurements for two of our sources using the Atacama Large Millimeter/submillimeter Array. The redshifts z = 5.1 and 3.8 confirm that with our selection method we can indeed find high-redshift dusty star-forming galaxies.

", "doi": "10.1093/mnras/stw1769", "issn": "0035-8711", "publisher": "Royal Astronomical Society", "publication": "Monthly Notices of the Royal Astronomical Society", "publication_date": "2016-07-25", "series_number": "2", "volume": "462", "issue": "2", "pages": "1989-2000" }, { "id": "authors:25tjm-rdb68", "collection": "authors", "collection_id": "25tjm-rdb68", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151215-135515752", "type": "article", "title": "Peculiar Velocity Constraints from Five-Band SZ Effect Measurements Towards RX J1347.5-1145 with MUSIC and Bolocam from the CSO", "author": [ { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Siegel", "given_name": "Seth R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Hollister", "given_name": "Matthew I.", "clpid": "Hollister-M-I" }, { "family_name": "Lam", "given_name": "Albert", "clpid": "Lam-A" }, { "family_name": "Miller", "given_name": "David A.", "clpid": "Miller-D-A" }, { "family_name": "Radford", "given_name": "Simon J. E.", "clpid": "Radford-S-J-E" }, { "family_name": "Schlaerth", "given_name": "James A.", "clpid": "Schlaerth-J-A" }, { "family_name": "Vayonakis", "given_name": "Anastasios", "clpid": "Vayonakis-A" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "We present Sunyaev-Zel'dovich (SZ) effect measurements from wide-field images towards the galaxy cluster RX J1347.5-1145 obtained from the Caltech Submillimeter Observatory with the Multiwavelength Submillimeter Inductance Camera (MUSIC) at 147, 213, 281, and 337 GHz and with Bolocam at 140 GHz. As part of our analysis, we have used higher frequency data from Herschel-SPIRE and\npreviously published lower frequency radio data to subtract the signal from the brightest dusty star-forming galaxies behind RX J1347.5-1145 and from the AGN in RX J1347.5-1145's BCG. Using these five-band SZ effect images, combined with previously published X-ray spectroscopic measurements of the temperature of the intra-cluster medium (ICM) from Chandra, we constrain the ICM optical depth\nto be \u03c4_e = 2.73^(+0.38)_(-0.39) x 10^(-3) and the ICM line of sight peculiar velocity to be v_(pec) = -1260^(+760)_(-530) km s^(-1). The errors for both quantities are limited by measurement noise rather than calibration uncertainties or astrophysical contamination, and significant improvements are possible with deeper observations. Our best-fit velocity is in mild tension with the two previously published SZ effect measurements for RX J1347.5-1145, although some or all of the tension may be because those measurements sample the cluster differently.", "doi": "10.3847/0004-637X/820/2/101", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2016-04-01", "series_number": "2", "volume": "820", "issue": "2", "pages": "Art. No. 101" }, { "id": "authors:0x3cd-dy990", "collection": "authors", "collection_id": "0x3cd-dy990", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160418-090246198", "type": "article", "title": "The Morphologies and Alignments of Gas, Mass, and the Central Galaxies of CLASH Clusters of Galaxies", "author": [ { "family_name": "Donahue", "given_name": "Megan", "orcid": "0000-0002-2808-0853", "clpid": "Donahue-Megan" }, { "family_name": "Ettori", "given_name": "Stefano", "orcid": "0000-0003-4117-8617", "clpid": "Ettori-Stefano" }, { "family_name": "Rasia", "given_name": "Elena", "clpid": "Rasia-Elena" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Zitrin", "given_name": "Adi", "orcid": "0000-0002-0350-4488", "clpid": "Zitrin-Adi" }, { "family_name": "Meneghetti", "given_name": "Massimo", "orcid": "0000-0003-1225-7084", "clpid": "Meneghetti-M" }, { "family_name": "Voit", "given_name": "G. Mark", "clpid": "Voit-G-M" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Yepes", "given_name": "Gustavo", "clpid": "Yepes-G" }, { "family_name": "Baldi", "given_name": "Alessandro", "clpid": "Baldi-Alessandro" }, { "family_name": "Koekemoer", "given_name": "Anton M.", "orcid": "0000-0002-6610-2048", "clpid": "Koekemoer-A-M" }, { "family_name": "Postman", "given_name": "Marc", "orcid": "0000-0002-9365-7989", "clpid": "Postman-Marc" } ], "abstract": "Morphology is often used to infer the state of relaxation of galaxy clusters. The regularity, symmetry, and degree to which a cluster is centrally concentrated inform quantitative measures of cluster morphology. The Cluster Lensing and Supernova survey with Hubble Space Telescope (CLASH) used weak and strong lensing to measure the distribution of matter within a sample of 25 clusters, 20 of which were deemed to be \"relaxed\" based on their X-ray morphology and alignment of the X-ray emission with the Brightest Cluster Galaxy. Toward a quantitative characterization of this important sample of clusters, we present uniformly estimated X-ray morphological statistics for all 25 CLASH clusters. We compare X-ray morphologies of CLASH clusters with those identically measured for a large sample of simulated clusters from the MUSIC-2 simulations, selected by mass. We confirm a threshold in X-ray surface brightness concentration of C \u2273 0.4 for cool-core clusters, where C is the ratio of X-ray emission inside 100 h_(70)^(\u22121) kpc compared to inside 500 h_(70)^(-1)kpc. We report and compare morphologies of these clusters inferred from Sunyaev\u2013Zeldovich Effect (SZE) maps of the hot gas and in from projected mass maps based on strong and weak lensing. We find a strong agreement in alignments of the orientation of major axes for the lensing, X-ray, and SZE maps of nearly all of the CLASH clusters at radii of 500 kpc (approximately 1/2 R_(500) for these clusters). We also find a striking alignment of clusters shapes at the 500 kpc scale, as measured with X-ray, SZE, and lensing, with that of the near-infrared stellar light at 10 kpc scales for the 20 \"relaxed\" clusters. This strong alignment indicates a powerful coupling between the cluster- and galaxy-scale galaxy formation processes.", "doi": "10.3847/0004-637X/819/1/36", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2016-03-01", "series_number": "1", "volume": "819", "issue": "1", "pages": "Art. No. 36" }, { "id": "authors:699my-8x519", "collection": "authors", "collection_id": "699my-8x519", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160316-114020422", "type": "article", "title": "New Results from the Search for Low-Mass Weakly Interacting Massive Particles with the CDMS Low Ionization Threshold Experiment", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "The CDMS low ionization threshold experiment (CDMSlite) uses cryogenic germanium detectors operated at a relatively high bias voltage to amplify the phonon signal in the search for weakly interacting massive particles (WIMPs). Results are presented from the second CDMSlite run with an exposure of 70 kg day, which reached an energy threshold for electron recoils as low as 56 eV. A fiducialization cut reduces backgrounds below those previously reported by CDMSlite. New parameter space for the WIMP-nucleon spin-independent cross section is excluded for WIMP masses between 1.6 and 5.5\u2009\u2009GeV/c^2.", "doi": "10.1103/PhysRevLett.116.071301", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2016-02-19", "series_number": "7", "volume": "116", "issue": "7", "pages": "Art. No. 071301" }, { "id": "authors:gpttv-bz656", "collection": "authors", "collection_id": "gpttv-bz656", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151222-131922150", "type": "article", "title": "BICEP2. III. Instrumental Systematics", "author": [ { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hildebrandt", "given_name": "S. R.", "clpid": "Hildebrant-S-R" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" } ], "abstract": "In a companion paper, we have reported a >5\u03c3 detection of degree scale B-mode polarization at 150 GHz by the Bicep2 experiment. Here we provide a detailed study of potential instrumental systematic contamination to that measurement. We focus extensively on spurious polarization that can potentially arise from beam imperfections. We present a heuristic classification of beam imperfections according to their symmetries and uniformities, and discuss how resulting contamination adds or cancels in maps that combine observations made at multiple orientations of the telescope about its boresight axis. We introduce a technique, which we call \"deprojection,\" for filtering the leading order beam-induced contamination from time-ordered data, and show that it reduces power in Bicep2's actual and null-test BB spectra consistent with predictions using high signal-to-noise beam shape measurements. We detail the simulation pipeline that we use to directly simulate instrumental systematics and the calibration data used as input to that pipeline. Finally, we present the constraints on BB contamination from individual sources of potential systematics. We find that systematics contribute BB power that is a factor of ~10\u00d7 below Bicep2's three-year statistical uncertainty, and negligible compared to the observed BB signal. The contribution to the best-fit tensor/scalar ratio is at a level equivalent to r = (3\u20136) \u00d7 10^(\u22123).", "doi": "10.1088/0004-637X/814/2/110", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2015-12-01", "series_number": "2", "volume": "814", "issue": "2", "pages": "Art. No. 110" }, { "id": "authors:4cz7n-mg310", "collection": "authors", "collection_id": "4cz7n-mg310", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151221-071230729", "type": "article", "title": "Antenna-coupled TES Bolometers Used in BICEP2, Keck Array, and Spider", "author": [ { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hildebrandt", "given_name": "S. R.", "clpid": "Hildebrant-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Hui", "given_name": "H.", "clpid": "Hui-Howard" }, { "family_name": "Kefeli", "given_name": "S.", "clpid": "Kefeli-S" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Mason", "given_name": "P.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Moncelsi", "given_name": "L.", "orcid": "0000-0002-4242-3015", "clpid": "Moncelsi-Lorenzo" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" }, { "family_name": "Trangsrud", "given_name": "A.", "clpid": "Trangsrud-Amy-R" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" }, { "literal": "BICEP2 Collaboration" }, { "literal": "KECK ARRAY Collaborations" }, { "literal": "SPIDER Collaboration" } ], "abstract": "We have developed antenna-coupled transition-edge sensor bolometers for a wide range of cosmic microwave background (CMB) polarimetry experiments, including Bicep2, Keck Array, and the balloon borne Spider. These detectors have reached maturity and this paper reports on their design principles, overall performance, and key challenges associated with design and production. Our detector arrays repeatedly produce spectral bands with 20%\u201330% bandwidth at 95, 150, or 230 GHz. The integrated antenna arrays synthesize symmetric co-aligned beams with controlled side-lobe levels. Cross-polarized response on boresight is typically ~ 0.5%, consistent with cross-talk in our multiplexed readout system. End-to-end optical efficiencies in our cameras are routinely 35% or higher, with per detector sensitivities of NET ~ 300 \u00b5K_(CMB\u221as). Thanks to the scalability of this design, we have deployed 2560 detectors as 1280 matched pairs in Keck Array with a combined instantaneous sensitivity of ~9 \u00b5K_CMB\u221as), as measured directly from CMB maps in the 2013 season. Similar arrays have recently flown in the Spider instrument, and development of this technology is ongoing.", "doi": "10.1088/0004-637X/812/2/176", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2015-10-20", "series_number": "2", "volume": "812", "issue": "2", "pages": "Art. No. 176" }, { "id": "authors:kx0te-ar329", "collection": "authors", "collection_id": "kx0te-ar329", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151106-083216867", "type": "article", "title": "Improved WIMP-search reach of the CDMS II germanium data", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "CDMS II data from the five-tower runs at the Soudan Underground Laboratory were reprocessed with an improved charge-pulse fitting algorithm. Two new analysis techniques to reject surface-event backgrounds were applied to the 612 kg days germanium-detector weakly interacting massive particle (WIMP)-search exposure. An extended analysis was also completed by decreasing the 10 keV analysis threshold to \u223c5\u2009\u2009keV, to increase sensitivity near a WIMP mass of 8\u2009\u2009GeV/c^2. After unblinding, there were zero candidate events above a deposited energy of 10 keV and six events in the lower-threshold analysis. This yielded minimum WIMP-nucleon spin-independent scattering cross-section limits of 1.8\u00d710^(\u221244) and 1.18\u00d710^(\u221241) at 90% confidence for 60 and 8.6\u2009\u2009GeV/c^2 WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6)\u2009\u2009GeV/c^2 WIMPs.", "doi": "10.1103/PhysRevD.92.072003", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2015-10-01", "series_number": "7", "volume": "92", "issue": "7", "pages": "Art. No. 072003" }, { "id": "authors:e93zx-kky68", "collection": "authors", "collection_id": "e93zx-kky68", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151119-132830511", "type": "article", "title": "BICEP2/Keck Array V: Measurements of B-mode Polarization at Degree Angular Scales and 150 GHz by the Keck Array", "author": [ { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hildebrandt", "given_name": "S. R.", "clpid": "Hildebrant-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Hui", "given_name": "H.", "clpid": "Hui-Howard" }, { "family_name": "Kefeli", "given_name": "S.", "clpid": "Kefeli-S" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Mason", "given_name": "P. V.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" } ], "abstract": "The Keck Array is a system of cosmic microwave background polarimeters, each similar to the Bicep2 experiment. In this paper we report results from the 2012 to 2013 observing seasons, during which the Keck Array consisted of five receivers all operating in the same (150 GHz) frequency band and observing field as Bicep2. We again find an excess of B-mode power over the lensed-\u039bCDM expectation of >5\u03c3 in the range 30 < \u2113 < 150 and confirm that this is not due to systematics using jackknife tests and simulations based on detailed calibration measurements. In map difference and spectral difference tests these new data are shown to be consistent with Bicep2. Finally, we combine the maps from the two experiments to produce final Q and U maps which have a depth of 57 nK deg (3.4 \u03bcK arcmin) over an effective area of 400 deg^2 for an equivalent survey weight of 250,000 \u03bcK^(\u22122). The final BB band powers have noise uncertainty a factor of 2.3 times better than the previous results, and a significance of detection of excess power of >6\u03c3.", "doi": "10.1088/0004-637X/811/2/126", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2015-10-01", "series_number": "2", "volume": "811", "issue": "2", "pages": "Art. No. 126" }, { "id": "authors:zg6z8-jc908", "collection": "authors", "collection_id": "zg6z8-jc908", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150820-094605136", "type": "article", "title": "Thermal conductance measurements of bolted copper joints for SuperCDMS", "author": [ { "family_name": "Schmitt", "given_name": "R. L.", "clpid": "Schmitt-R-L" }, { "family_name": "Tatkowski", "given_name": "G.", "clpid": "Tatkowski-G" }, { "family_name": "Ruschman", "given_name": "M.", "clpid": "Ruschman-M" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Kellaris", "given_name": "N.", "clpid": "Kellaris-N" }, { "family_name": "Daal", "given_name": "M.", "orcid": "0000-0002-1134-2116", "clpid": "Daal-M" }, { "family_name": "Hall", "given_name": "J.", "clpid": "Hall-J" }, { "family_name": "Hoppe", "given_name": "E. W.", "clpid": "Hoppe-E-W" } ], "abstract": "Joint thermal conductance testing has been undertaken for bolted copper to copper connections from 60 mK to 26 K. This testing was performed to validate an initial design basis for the SuperCDMS experiment, where a dilution refrigerator will be coupled to a cryostat via multiple bolted connections. Copper used during testing was either gold plated or passivated with citric acid to prevent surface oxidation. Results obtained are well fit by a power law regression of joint thermal conductance to temperature and match well with data collected during a literature review.", "doi": "10.1016/j.cryogenics.2015.04.006", "issn": "0011-2275", "publisher": "Elsevier", "publication": "Cryogenics", "publication_date": "2015-09", "volume": "70", "pages": "41-46" }, { "id": "authors:g8nh8-kan59", "collection": "authors", "collection_id": "g8nh8-kan59", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20151020-102559988", "type": "article", "title": "Measurements of the Sunyaev-Zel'dovich Effect in MACS J0647.7+7015 and MACS J1206.2-0847 at High Angular Resolution with MUSTANG", "author": [ { "family_name": "Young", "given_name": "Alexander H.", "orcid": "0000-0003-2291-6952", "clpid": "Young-Alexander-H" }, { "family_name": "Mroczkowski", "given_name": "Tony", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-Anthony-K" }, { "family_name": "Romero", "given_name": "Charles", "clpid": "Romero-Charles-E" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Balestra", "given_name": "Italo", "clpid": "Balestra-Italo" }, { "family_name": "Clarke", "given_name": "Tracy E.", "clpid": "Clarke-T-E" }, { "family_name": "Czakon", "given_name": "Nicole", "clpid": "Czakon-Nicole-G" }, { "family_name": "Devlin", "given_name": "Mark", "orcid": "0000-0002-3169-9761", "clpid": "Devlin-Mark-J" }, { "family_name": "Dicker", "given_name": "Simon R.", "orcid": "0000-0002-1940-4289", "clpid": "Dicker-Simon-R" }, { "family_name": "Ferrari", "given_name": "Chiara", "clpid": "Ferrari-Chiara" }, { "family_name": "Girardi", "given_name": "Marisa", "clpid": "Girardi-Marisa" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Intema", "given_name": "Huib T.", "orcid": "0000-0002-5880-2730", "clpid": "Intema-Huib-T" }, { "family_name": "Korngut", "given_name": "Phillip M.", "clpid": "Korngut-Phillip-M" }, { "family_name": "Mason", "given_name": "Brian S.", "clpid": "Mason-Brian-S" }, { "family_name": "Mercurio", "given_name": "Amata", "clpid": "Mercurio-Amata" }, { "family_name": "Nonino", "given_name": "Mario", "orcid": "0000-0001-6342-9662", "clpid": "Nonino-Mario" }, { "family_name": "Reese", "given_name": "Erik D.", "orcid": "0000-0002-8700-7082", "clpid": "Reese-Erik-D" }, { "family_name": "Rosati", "given_name": "Piero", "orcid": "0000-0002-6813-0632", "clpid": "Rosati-Piero" }, { "family_name": "Sarazin", "given_name": "Craig", "clpid": "Sarazin-Craig" }, { "family_name": "Umetsu", "given_name": "Keiichi", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" } ], "abstract": "We present high resolution (9'') imaging of the Sunyaev\u2013Zel'dovich Effect (SZE) toward two massive galaxy clusters, MACS J0647.7+7015 (z = 0.591) and MACS J1206.2\u20130847 (z = 0.439). We compare these 90 GHz measurements, taken with the Multiplexed Squid/TES Array at Ninety Gigahertz (MUSTANG ) receiver on the Green Bank Telescope, with generalized Navarro\u2013Frenk\u2013White (gNFW) models derived from Bolocam 140 GHz SZE data as well as maps of the thermal gas derived from Chandra X-ray observations. We adopt a serial-fitting approach, in which gNFW models are first fit to the Bolocam data and then compared to the MUSTANG data to determine an overall best-fit model. For MACS J0647.7+7015, we find a gNFW profile with core slope parameter \u03b3 = 0.9 fits the MUSTANG image with \u03c7^2_(red) = 1.005 and probability to exceed (PTE) = 0.34. For MACS J1206.2\u20130847, we find \u03b3 = 0.7, \u03c7^2_(red) = 0.993, and PTE = 0.70. In addition, we find a significant (>3\u03c3) residual SZE feature in MACS J1206.2\u20130847 coincident with a group of galaxies identified in Very Large Telescope data and filamentary structure found in a weak-lensing mass reconstruction. We suggest the detected sub-structure may be the SZE decrement from a low mass foreground group or an infalling group. Giant Metrewave Radio Telescope measurements at 610 MHz reveal diffuse extended radio emission to the west, which we posit is either an active galactic nucleus-driven radio lobe, a bubble expanding away from disturbed gas associated with the SZE signal, or a bubble detached and perhaps re-accelerated by sloshing within the cluster. Using the spectroscopic redshifts available, we find evidence for a foreground (z = 0.423) or infalling group, coincident with the residual SZE feature.", "doi": "10.1088/0004-637X/809/2/185", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2015-08-20", "series_number": "2", "volume": "809", "issue": "2", "pages": "Art. No. 185" }, { "id": "authors:2z8m5-shh50", "collection": "authors", "collection_id": "2z8m5-shh50", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150831-091354624", "type": "article", "title": "Galaxy Cluster Pressure Profiles, as Determined by Sunyaev Zeldovich Effect Observations with MUSTANG and Bolocam I: Joint Analysis Technique", "author": [ { "family_name": "Romero", "given_name": "Charles E.", "clpid": "Romero-Charles-E" }, { "family_name": "Mason", "given_name": "Brian S.", "clpid": "Mason-Brian-S" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Young", "given_name": "Alexander H.", "orcid": "0000-0003-2291-6952", "clpid": "Young-Alexander-H" }, { "family_name": "Mroczkowski", "given_name": "Tony", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-Anthony-K" }, { "family_name": "Clarke", "given_name": "Tracy E.", "orcid": "0000-0001-6812-7938", "clpid": "Clarke-Tracy-E" }, { "family_name": "Sarazin", "given_name": "Craig", "clpid": "Sarazin-Craig" }, { "family_name": "Sievers", "given_name": "Jonathon", "orcid": "0000-0001-6903-5074", "clpid": "Sievers-Jonathan" }, { "family_name": "Dicker", "given_name": "Simon R.", "orcid": "0000-0002-1940-4289", "clpid": "Dicker-Simon-R" }, { "family_name": "Reese", "given_name": "Erik D.", "orcid": "0000-0002-8700-7082", "clpid": "Reese-Erik-D" }, { "family_name": "Czakon", "given_name": "Nicole", "clpid": "Czakon-Nicole-G" }, { "family_name": "Devlin", "given_name": "Mark", "orcid": "0000-0002-3169-9761", "clpid": "Devlin-Mark-J" }, { "family_name": "Korngut", "given_name": "Phillip M.", "clpid": "Korngut-Phillip-M" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "We present a technique to constrain galaxy cluster pressure profiles by jointly fitting Sunyaev-Zeldovich effect (SZE) data obtained with MUSTANG and Bolocam for the clusters Abell 1835 and MACS0647. Bolocam and MUSTANG probe different angular scales and are thus highly complementary. We find that the addition of the high-resolution MUSTANG data can improve constraints on pressure profile parameters relative to those derived solely from Bolocam. In Abell 1835 and MACS0647, we find gNFW inner slopes of \u03b3=0.36^(+0.33)_(-0.21) and \u03b3=0.38^(+0.20)_(0.25), respectively, when \u03b1 and \u03b2 are constrained to 0.86 and 4.67, respectively. The fitted SZE pressure profiles are in good agreement with X-ray derived pressure profiles.", "doi": "10.1088/0004-637X/807/2/121", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2015-07-10", "series_number": "2", "volume": "807", "issue": "2", "pages": "Art. No. 121" }, { "id": "authors:9qejz-3wk07", "collection": "authors", "collection_id": "9qejz-3wk07", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150804-084849060", "type": "article", "title": "BICEP2/Keck Array. IV. Optical Characterization and Performance of the BICEP2 and Keck Array Experiments", "author": [ { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hildebrandt", "given_name": "S. R.", "clpid": "Hildebrant-S-R" }, { "family_name": "Hui", "given_name": "H.", "clpid": "Hui-Howard" }, { "family_name": "Kefeli", "given_name": "S.", "clpid": "Kefeli-S" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" }, { "literal": "BICEP2 Collaboration" }, { "literal": "KECK ARRAY Collaborations" } ], "abstract": "bicep2 and the Keck Array are polarization-sensitive microwave telescopes that observe the cosmic microwave background (CMB) from the South Pole at degree angular scales in search of a signature of inflation imprinted as B-mode polarization in the CMB. bicep2 was deployed in late 2009, observed for three years until the end of 2012 at 150 GHz with 512 antenna-coupled transition edge sensor bolometers, and has reported a detection of B-mode polarization on degree angular scales. The Keck Array was first deployed in late 2010 and will observe through 2016 with five receivers at several frequencies (95, 150, and 220 GHz). bicep2 and the Keck Array share a common optical design and employ the field-proven bicep1 strategy of using small-aperture, cold, on-axis refractive optics, providing excellent control of systematics while maintaining a large field of view. This design allows for full characterization of far-field optical performance using microwave sources on the ground. Here we describe the optical design of both instruments and report a full characterization of the optical performance and beams of bicep2 and the Keck Array at 150 GHz.", "doi": "10.1088/0004-637X/806/2/206", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2015-06-20", "series_number": "2", "volume": "806", "issue": "2", "pages": "Art. No. 206" }, { "id": "authors:far5e-s9c22", "collection": "authors", "collection_id": "far5e-s9c22", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150728-091100604", "type": "article", "title": "Galaxy Cluster Scaling Relations between Bolocam Sunyaev-Zel'dovich Effect and Chandra X-Ray Measurements", "author": [ { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Mantz", "given_name": "A.", "orcid": "0000-0002-8031-1217", "clpid": "Mantz-A-B" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Downes", "given_name": "T. P.", "clpid": "Downes-T-P" }, { "family_name": "Koch", "given_name": "P. M.", "orcid": "0000-0003-2777-5861", "clpid": "Koch-P-M" }, { "family_name": "Lin", "given_name": "K.-Y.", "orcid": "0000-0002-8698-7277", "clpid": "Lin-Kai-Yang" }, { "family_name": "Molnar", "given_name": "S. M.", "orcid": "0000-0002-4227-956X", "clpid": "Molnar-S-M" }, { "family_name": "Moustakas", "given_name": "L. A.", "orcid": "0000-0003-3030-2360", "clpid": "Moustakas-L-A" }, { "family_name": "Mroczkowski", "given_name": "T.", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "Pierpaoli", "given_name": "E.", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Shitanishi", "given_name": "J. A.", "clpid": "Shitanishi-Jennifer-A" }, { "family_name": "Siegel", "given_name": "S. R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Umetsu", "given_name": "K.", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" } ], "abstract": "We present scaling relations between the integrated Sunyaev\u2013Zel'dovich effect (SZE) signal, Y_(SZ), its X-ray\nanalogue, Y_X \u2261 M_(gas)T_X, and total mass, M_(tot), for the 45 galaxy clusters in the Bolocam X-ray SZ (BOXSZ) sample.\nAll parameters are integrated within r_(2500). Y_(2500) values are measured using SZE data collected with Bolocam,\noperating at 140 GHz at the Caltech Submillimeter Observatory. The temperature, T_X, and mass, M_(gas,2500), of the intracluster medium are determined using X-ray data collected with Chandra, and M_(tot) is derived from M_(gas) assuming a constant gas mass fraction. Our analysis accounts for several potential sources of bias, including\nselection effects, contamination from radio point sources, and the loss of SZE signal due to noise filtering and\nbeam-smoothing effects. We measure the Y_(2500)\u2013Y_X scaling to have a power-law index of 0.84 \u00b1 0.07, and a fractional intrinsic scatter in Y_(2500) of (21 \u00b1 7)% at fixed YX, both of which are consistent with previous analyses. We also measure the scaling between Y_2500 and M_2500, finding a power-law index of 1.06 \u00b1 0.12 and a fractional intrinsic scatter in Y_(2500) at fixed mass of (25 \u00b1 9)%. While recent SZE scaling relations using X-ray mass proxies have found power-law indices consistent with the self-similar prediction of 5/3, our measurement stands apart by\ndiffering from the self-similar prediction by approximately 5\u03c3. Given the good agreement between the measured\nY_(2500)\u2013Y_X scalings, much of this discrepancy appears to be caused by differences in the calibration of the X-ray mass\nproxies adopted for each particular analysis.", "doi": "10.1088/0004-637X/806/1/18", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2015-06-10", "series_number": "1", "volume": "806", "issue": "1", "pages": "Art. No. 18" }, { "id": "authors:a20h7-1nx74", "collection": "authors", "collection_id": "a20h7-1nx74", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150611-102527126", "type": "article", "title": "Dark matter effective field theory scattering in direct detection experiments", "author": [ { "family_name": "Schneck", "given_name": "K.", "clpid": "Schneck-K" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "We examine the consequences of the effective field theory (EFT) of dark matter\u2013nucleon scattering for current and proposed direct detection experiments. Exclusion limits on EFT coupling constants computed using the optimum interval method are presented for SuperCDMS Soudan, CDMS II, and LUX, and the necessity of combining results from multiple experiments in order to determine dark matter parameters is discussed. We demonstrate that spectral differences between the standard dark matter model and a general EFT interaction can produce a bias when calculating exclusion limits and when developing signal models for likelihood and machine learning techniques. We also discuss the implications of the EFT for the next-generation (G2) direct detection experiments and point out regions of complementarity in the EFT parameter space.", "doi": "10.1103/PhysRevD.91.092004", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2015-05-18", "series_number": "9", "volume": "91", "issue": "9", "pages": "Art. No. 092004" }, { "id": "authors:r6q28-cnr96", "collection": "authors", "collection_id": "r6q28-cnr96", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150430-135425461", "type": "article", "title": "First Direct Limits on Lightly Ionizing Particles with Electric Charge Less than e=6", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "literal": "CDMS Collaboration" } ], "abstract": "While the standard model of particle physics does not include free particles with fractional charge, experimental searches have not ruled out their existence. We report results from the Cryogenic Dark Matter Search (CDMS II) experiment that give the first direct-detection limits for cosmogenically produced relativistic particles with electric charge lower than e/6. A search for tracks in the six stacked detectors of each of two of the CDMS II towers finds no candidates, thereby excluding new parameter space for particles with electric charges between e/6 and e/200.", "doi": "10.1103/PhysRevLett.114.111302", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2015-03-20", "series_number": "11", "volume": "114", "issue": "11", "pages": "Art. No. 111302" }, { "id": "authors:bv7yz-e4e53", "collection": "authors", "collection_id": "bv7yz-e4e53", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150205-194356590", "type": "article", "title": "A Joint Analysis of BICEP2/Keck Array and Planck Data", "author": [ { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-Peter-A-R" }, { "family_name": "Aghanim", "given_name": "N.", "orcid": "0000-0002-6688-8992", "clpid": "Aghanim-Nabila" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Alexander", "given_name": "K. D.", "orcid": "0000-0002-8297-2473", "clpid": "Alexander-Kate-D" }, { "family_name": "Arnaud", "given_name": "M.", "clpid": "Arnaud-M" }, { "family_name": "Aumont", "given_name": "J.", "clpid": "Aumont-J" }, { "family_name": "Baccigalupi", "given_name": "C.", "clpid": "Baccigalupi-C" }, { "family_name": "Banday", "given_name": "A. J.", "clpid": "Banday-A-J" }, { "family_name": "Barkats", "given_name": "D.", "clpid": "Barkats-D" }, { "family_name": "Barreiro", "given_name": "R. B.", "orcid": "0000-0002-6139-4272", "clpid": "Barreiro-Rita-Belen" }, { "family_name": "Bartlett", "given_name": "J. G.", "clpid": "Bartlett-J-G" }, { "family_name": "Bartolo", "given_name": "N.", "clpid": "Bartolo-N" }, { "family_name": "Battaner", "given_name": "E.", "clpid": "Battaner-E" }, { "family_name": "Benabed", "given_name": "K.", "clpid": "Benabed-K" }, { "family_name": "Benoit-L\u00e9vy", "given_name": "A.", "clpid": "Benoit-Levy-A" }, { "family_name": "Benton", "given_name": "S. J.", "clpid": "Benton-S-J" }, { "family_name": "Bernard", "given_name": "J. -P.", "clpid": "Bernard-J-P" }, { "family_name": "Bersanelli", "given_name": "M.", "clpid": "Bersanelli-M" }, { "family_name": "Bielewicz", "given_name": "P.", "clpid": "Bielewicz-P" }, { "family_name": "Bischoff", "given_name": "C. A.", "clpid": "Bischoff-C-A" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Bonaldi", "given_name": "A.", "clpid": "Bonaldi-A" }, { "family_name": "Bonavera", "given_name": "L.", "clpid": "Bonavera-L" }, { "family_name": "Bond", "given_name": "J. R.", "orcid": "0000-0003-2358-9949", "clpid": "Bond-J-Richard" }, { "family_name": "Borrill", "given_name": "J.", "clpid": "Borrill-J" }, { "family_name": "Bouchet", "given_name": "F. R.", "clpid": "Bouchet-F-R" }, { "family_name": "Boulanger", "given_name": "F.", "clpid": "Boulanger-F" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Bucher", "given_name": "M.", "clpid": "Bucher-M" }, { "family_name": "Buder", "given_name": "I.", "clpid": "Buder-I" }, { "family_name": "Bullock", "given_name": "E.", "clpid": "Bullock-E" }, { "family_name": "Burigana", "given_name": "C.", "clpid": "Burigana-C" }, { "family_name": "Butler", "given_name": "R. C.", "clpid": "Butler-R-C" }, { "family_name": "Buza", "given_name": "V.", "clpid": "Buza-V" }, { "family_name": "Calabrese", "given_name": "E.", "clpid": "Calabrese-E" }, { "family_name": "Cardoso", "given_name": "J. -F.", "clpid": "Cardoso-J-F" }, { "family_name": "Catalano", "given_name": "A.", "clpid": "Catalano-A" }, { "family_name": "Challinor", "given_name": "A.", "clpid": "Challinor-A" }, { "family_name": "Chary", "given_name": "R.-R.", "orcid": "0000-0001-7583-0621", "clpid": "Chary-Ranga-Ram" }, { "family_name": "Chiang", "given_name": "H. C.", "clpid": "Chiang-H-C" }, { "family_name": "Christensen", "given_name": "P. R.", "clpid": "Christensen-P-R" }, { "family_name": "Colombo", "given_name": "L. P. L.", "clpid": "Colombo-L-P-L" }, { "family_name": "Combet", "given_name": "C.", "clpid": "Combet-C" }, { "family_name": "Connors", "given_name": "J.", "clpid": "Connors-J" }, { "family_name": "Couchot", "given_name": "F.", "clpid": "Couchot-F" }, { "family_name": "Coulais", "given_name": "A.", "clpid": "Coulais-A" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-Brendan-P" }, { "family_name": "Curto", "given_name": "A.", "clpid": "Curto-A" }, { "family_name": "Cuttaia", "given_name": "F.", "clpid": "Cuttaia-F" }, { "family_name": "Danese", "given_name": "L.", "clpid": "Danese-L" }, { "family_name": "Davies", "given_name": "R. D.", "clpid": "Davies-R-D" }, { "family_name": "Davis", "given_name": "R. J.", "clpid": "Davis-R-J" }, { "family_name": "de Bernardis", "given_name": "Paolo", "orcid": "0000-0001-6547-6446", "clpid": "de-Bernardis-Paolo" }, { "family_name": "Rosa", "given_name": "A. de", "clpid": "Rosa-A-D" }, { "family_name": "Zotti", "given_name": "G. de", "clpid": "Zotti-G-D" }, { "family_name": "Delabrouille", "given_name": "J.", "clpid": "Delabrouille-J" }, { "family_name": "Delouis", "given_name": "J. -M.", "clpid": "Delouis-J-M" }, { "family_name": "D\u00e9sert", "given_name": "F. -X.", "clpid": "D\u00e9sert-F-X" }, { "family_name": "Dickinson", "given_name": "C.", "orcid": "0000-0002-0045-442X", "clpid": "Dickinson-Clive" }, { "family_name": "Diego", "given_name": "J. M.", "orcid": "0000-0001-9065-3926", "clpid": "Diego-Jose-M" }, { "family_name": "Dole", "given_name": "H.", "clpid": "Dole-H" }, { "family_name": "Donzelli", "given_name": "S.", "clpid": "Donzelli-S" }, { "family_name": "Dor\u00e9", "given_name": "O.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Douspis", "given_name": "M.", "clpid": "Douspis-M" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Duband", "given_name": "L.", "clpid": "Duband-L" }, { "family_name": "Ducout", "given_name": "A.", "clpid": "Ducout-A" }, { "family_name": "Dunkley", "given_name": "J.", "clpid": "Dunkley-J" }, { "family_name": "Dupac", "given_name": "X.", "clpid": "Dupac-X" }, { "family_name": "Dvorkin", "given_name": "C.", "clpid": "Dvorkin-C" }, { "family_name": "Efstathiou", "given_name": "G.", "clpid": "Efstanthiou-G" }, { "family_name": "Elsner", "given_name": "F.", "clpid": "Elsner-F" }, { "family_name": "En\u00dflin", "given_name": "T. A.", "clpid": "En\u00dflin-T-A" }, { "family_name": "Eriksen", "given_name": "H. K.", "clpid": "Erinksen-H-K" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-Jeffrey-P" }, { "family_name": "Finelli", "given_name": "F.", "clpid": "Finelli-F" }, { "family_name": "Fliescher", "given_name": "S.", "clpid": "Fliescher-S" }, { "family_name": "Forni", "given_name": "O.", "orcid": "0000-0001-6772-9689", "clpid": "Forni-Olivier" }, { "family_name": "Frailis", "given_name": "M.", "clpid": "Frailis-M" }, { "family_name": "Fraisse", "given_name": "A. A.", "clpid": "Fraisse-A-A" }, { "family_name": "Franceschi", "given_name": "E.", "clpid": "Franceschi-E" }, { "family_name": "Frejsel", "given_name": "A.", "clpid": "Frejsel-A" }, { "family_name": "Galeotta", "given_name": "S.", "clpid": "Galeotta-S" }, { "family_name": "Galli", "given_name": "S.", "clpid": "Galli-S" }, { "family_name": "Ganga", "given_name": "K.", "clpid": "Ganga-K" }, { "family_name": "Ghosh", "given_name": "T.", "clpid": "Ghosh-T" }, { "family_name": "Giard", "given_name": "M.", "clpid": "Gjard-M" }, { "family_name": "Gjerl\u00f8w", "given_name": "E.", "clpid": "Gjerl\u00f8w-E" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Gonz\u00e1lez-Nuevo", "given_name": "J.", "clpid": "Gonz\u00e1lez-Nuevo-J" }, { "family_name": "G\u00f3rski", "given_name": "K. M.", "clpid": "G\u00f3rski-K-M" }, { "family_name": "Gratton", "given_name": "S.", "clpid": "Gratton-S" }, { "family_name": "Gregorio", "given_name": "A.", "clpid": "Gregorio-A" }, { "family_name": "Gruppuso", "given_name": "A.", "clpid": "Gruppuso-A" }, { "family_name": "Gudmundsson", "given_name": "J. E.", "clpid": "Gudmundsson-J-E" }, { "family_name": "Halpern", "given_name": "M.", "orcid": "0000-0002-1760-0868", "clpid": "Halpern-Mark" }, { "family_name": "Hansen", "given_name": "F. K.", "clpid": "Hansen-F-K" }, { "family_name": "Hanson", "given_name": "D.", "clpid": "Hanson-D" }, { "family_name": "Harrison", "given_name": "D. L.", "clpid": "Harrison-D-L" }, { "family_name": "Hasselfield", "given_name": "M.", "clpid": "Hasselfield-M" }, { "family_name": "Helou", "given_name": "G.", "orcid": "0000-0003-3367-3415", "clpid": "Helou-G" }, { "family_name": "Henrot-Versill\u00e9", "given_name": "S.", "clpid": "Henrot-Versill\u00e9-S" }, { "family_name": "Herranz", "given_name": "D.", "clpid": "Herranz-D" }, { "family_name": "Hildebrandt", "given_name": "S. R.", "clpid": "Hildebrant-S-R" }, { "family_name": "Hilton", "given_name": "G. C.", "clpid": "Hilton-G-C" }, { "family_name": "Hivon", "given_name": "E.", "clpid": "Hivon-E" }, { "family_name": "Hobson", "given_name": "M.", "clpid": "Hobson-M" }, { "family_name": "Holmes", "given_name": "W. A.", "clpid": "Holmes-W-A" }, { "family_name": "Hovest", "given_name": "W.", "clpid": "Hovest-W" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Huffenberger", "given_name": "K. M.", "clpid": "Huffenberger-K-M" }, { "family_name": "Hui", "given_name": "H.", "clpid": "Hui-Howard" }, { "family_name": "Hurier", "given_name": "G.", "clpid": "Hurier-G" }, { "family_name": "Irwin", "given_name": "K. D.", "clpid": "Irwin-K-D" }, { "family_name": "Jaffe", "given_name": "A. H.", "clpid": "Jaffe-A-H" }, { "family_name": "Jaffe", "given_name": "T. R.", "clpid": "Jaffe-T-R" }, { "family_name": "Jewell", "given_name": "J.", "clpid": "Jewell-Jeffrey-B" }, { "family_name": "Jones", "given_name": "W. C.", "clpid": "Jones-W-C" }, { "family_name": "Juvela", "given_name": "M.", "clpid": "Juvela-M" }, { "family_name": "Karkare", "given_name": "K. S.", "orcid": "0000-0002-5215-6993", "clpid": "Karkare-Kirit-S" }, { "family_name": "Kaufman", "given_name": "J. P.", "clpid": "Kaufman-J-P" }, { "family_name": "Keating", "given_name": "B. G.", "clpid": "Keating-B-G" }, { "family_name": "Kefeli", "given_name": "S.", "clpid": "Kefeli-S" }, { "family_name": "Keihanen", "given_name": "E.", "clpid": "Keihanen-E" }, { "family_name": "Kernasovskiy", "given_name": "S. A.", "clpid": "Kernasovskiy-S-A" }, { "family_name": "Keskitalo", "given_name": "R.", "clpid": "Keskitalo-R" }, { "family_name": "Kisner", "given_name": "T. S.", "clpid": "Kisner-T-S" }, { "family_name": "Kneissl", "given_name": "R.", "clpid": "Kneissl-R" }, { "family_name": "Knoche", "given_name": "J.", "clpid": "Knoche-J" }, { "family_name": "Knox", "given_name": "L.", "clpid": "Knox-L" }, { "family_name": "Kovac", "given_name": "J. M.", "clpid": "Kovac-J-M" }, { "family_name": "Krachmalnicoff", "given_name": "N.", "clpid": "Krachmalnicoff-N" }, { "family_name": "Kunz", "given_name": "M.", "clpid": "Kunz-M" }, { "family_name": "Kuo", "given_name": "C. L.", "clpid": "Kuo-C-L" }, { "family_name": "Kurki-Suonio", "given_name": "H.", "clpid": "Kurki-Suonio-H" }, { "family_name": "Lagache", "given_name": "G.", "clpid": "Lagache-G" }, { "family_name": "L\u00e4hteenm\u00e4ki", "given_name": "A.", "clpid": "L\u00e4hteenm\u00e4ki-A" }, { "family_name": "Lamarre", "given_name": "J.-M.", "clpid": "Lamarre-J-M" }, { "family_name": "Lasenby", "given_name": "A.", "clpid": "Lasenby-A" }, { "family_name": "Lattanzi", "given_name": "M.", "clpid": "Lattanzi-M" }, { "family_name": "Lawrence", "given_name": "C. R.", "clpid": "Lawrence-C-R" }, { "family_name": "Leitch", "given_name": "E. M.", "clpid": "Leitch-E-M" }, { "family_name": "Leonardi", "given_name": "R.", "clpid": "Leonardi-R" }, { "family_name": "Levrier", "given_name": "F.", "clpid": "Levrier-F" }, { "family_name": "Lewis", "given_name": "A.", "clpid": "Lewis-A" }, { "family_name": "Liguori", "given_name": "M.", "clpid": "Liguori-M" }, { "family_name": "Lilje", "given_name": "P. B.", "clpid": "Lilje-P-B" }, { "family_name": "Linden-V\u00f8rnle", "given_name": "M.", "clpid": "Linden-V\u00f8rnle-M" }, { "family_name": "L\u00f3pez-Caniego", "given_name": "M.", "clpid": "L\u00f3pez-Caniego-M" }, { "family_name": "Lubin", "given_name": "P. M.", "clpid": "Lubin-P-M" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Mac\u00edas-P\u00e9rez", "given_name": "J. F.", "clpid": "Mac\u00edas-P\u00e9rez-J-F" }, { "family_name": "Maffei", "given_name": "B.", "clpid": "Maffei-B" }, { "family_name": "Maino", "given_name": "D.", "clpid": "Maino-D" }, { "family_name": "Mandolesi", "given_name": "N.", "clpid": "Mandolesi-N" }, { "family_name": "Mangilli", "given_name": "A.", "clpid": "Mangilli-A" }, { "family_name": "Maris", "given_name": "M.", "clpid": "Maris-M" }, { "family_name": "Martin", "given_name": "P. G.", "orcid": "0000-0002-5236-3896", "clpid": "Martin-Peter-G" }, { "family_name": "Mart\u00ednez-Gonz\u00e1lez", "given_name": "E.", "clpid": "Mart\u00ednez-Gonz\u00e1lez-E" }, { "family_name": "Masi", "given_name": "S.", "orcid": "0000-0001-5105-1439", "clpid": "Masi-Silvia" }, { "family_name": "Mason", "given_name": "P.", "clpid": "Mason-P" }, { "family_name": "Matarrese", "given_name": "S.", "clpid": "Matarrese-S" }, { "family_name": "Megerian", "given_name": "K. G.", "clpid": "Megerian-K-G" }, { "family_name": "Meinhold", "given_name": "P. R.", "clpid": "Meinhold-P-R" }, { "family_name": "Melchiorri", "given_name": "A.", "clpid": "Melchiorri-A" }, { "family_name": "Mendes", "given_name": "L.", "clpid": "Mendes-L" }, { "family_name": "Mennella", "given_name": "A.", "clpid": "Mennella-A" }, { "family_name": "Migliaccio", "given_name": "M.", "clpid": "Migliaccio-M" }, { "family_name": "Mitra", "given_name": "S.", "clpid": "Mitra-S" }, { "family_name": "Miville-Desch\u00eanes", "given_name": "M.-A.", "orcid": "0000-0002-7351-6062", "clpid": "Miville-Desch\u00eanes-Marc-Antoine" }, { "family_name": "Moneti", "given_name": "A.", "clpid": "Moneti-A" }, { "family_name": "Montier", "given_name": "L.", "clpid": "Montier-L" }, { "family_name": "Morgante", "given_name": "G.", "clpid": "Morgante-G" }, { "family_name": "Mortlock", "given_name": "D.", "clpid": "Mortlock-D" }, { "family_name": "Moss", "given_name": "A.", "clpid": "Moss-A" }, { "family_name": "Munshi", "given_name": "D.", "clpid": "Munshi-D" }, { "family_name": "Murphy", "given_name": "J. A.", "clpid": "Murphy-J-A" }, { "family_name": "Naselsky", "given_name": "P.", "clpid": "Naselsky-P" }, { "family_name": "Nati", "given_name": "F.", "clpid": "Nati-F" }, { "family_name": "Natoli", "given_name": "P.", "clpid": "Natoli-P" }, { "family_name": "Netterfield", "given_name": "C. B.", "clpid": "Netterfield-C-B" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "N\u00f8rgaard-Nielsen", "given_name": "H. U.", "clpid": "N\u00f8rgaard-Nielsen-H-U" }, { "family_name": "Noviello", "given_name": "F.", "clpid": "Noviello-F" }, { "family_name": "Novikov", "given_name": "D.", "clpid": "Novikov-D" }, { "family_name": "Novikov", "given_name": "I.", "clpid": "Novikov-I" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R" }, { "family_name": "Ogburn", "given_name": "R. W., IV", "clpid": "Ogburn-R-W-IV" }, { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Pagano", "given_name": "L.", "clpid": "Pagano-L" }, { "family_name": "Pajot", "given_name": "F.", "clpid": "Pajot-F" }, { "family_name": "Paladini", "given_name": "R.", "orcid": "0000-0002-5158-243X", "clpid": "Paladini-Roberta" }, { "family_name": "Paoletti", "given_name": "D.", "clpid": "Paoletti-D" }, { "family_name": "Partridge", "given_name": "B.", "clpid": "Partridge-B" }, { "family_name": "Pasian", "given_name": "F.", "clpid": "Pasian-F" }, { "family_name": "Patanchon", "given_name": "G.", "clpid": "Patanchon-G" }, { "family_name": "Pearson", "given_name": "T. J.", "orcid": "0000-0001-5213-6231", "clpid": "Pearson-Timothy-J" }, { "family_name": "Perdereau", "given_name": "O.", "clpid": "Perdereau-O" }, { "family_name": "Perotto", "given_name": "L.", "clpid": "Perotto-L" }, { "family_name": "Pettorino", "given_name": "V.", "clpid": "Pettorino-V" }, { "family_name": "Piacentini", "given_name": "F.", "orcid": "0000-0002-5444-9327", "clpid": "Piacentini-Francesco" }, { "family_name": "Piat", "given_name": "M.", "clpid": "Piat-M" }, { "family_name": "Pietrobon", "given_name": "D.", "clpid": "Pietrobon-D" }, { "family_name": "Plaszczynski", "given_name": "S.", "clpid": "Plaszczynski-S" }, { "family_name": "Pointecouteau", "given_name": "E.", "clpid": "Pointecouteau-E" }, { "family_name": "Polenta", "given_name": "G.", "clpid": "Polenta-G" }, { "family_name": "Ponthieu", "given_name": "N.", "clpid": "Ponthieu-N" }, { "family_name": "Pratt", "given_name": "G. W.", "clpid": "Pratt-G-W" }, { "family_name": "Prunet", "given_name": "S.", "clpid": "Prunet-S" }, { "family_name": "Pryke", "given_name": "C.", "clpid": "Pryke-C" }, { "family_name": "Puget", "given_name": "J.-L.", "clpid": "Puget-J-L" }, { "family_name": "Rachen", "given_name": "J. P.", "clpid": "Rachen-J-P" }, { "family_name": "Reach", "given_name": "W. T.", "orcid": "0000-0001-8362-4094", "clpid": "Reach-William-T" }, { "family_name": "Rebolo", "given_name": "R.", "orcid": "0000-0003-3767-7085", "clpid": "Rebolo-Rafael" }, { "family_name": "Reinecke", "given_name": "M.", "clpid": "Reinecke-M" }, { "family_name": "Remazeilles", "given_name": "M.", "clpid": "Remazeilles-M" }, { "family_name": "Renault", "given_name": "C.", "clpid": "Renault-C" }, { "family_name": "Renzi", "given_name": "A.", "clpid": "Renzi-A" }, { "family_name": "Richter", "given_name": "S.", "clpid": "Richter-S" }, { "family_name": "Ristorcelli", "given_name": "I.", "clpid": "Ristorcelli-I" }, { "family_name": "Rocha", "given_name": "G.", "orcid": "0000-0002-4150-8076", "clpid": "Rocha-Graca-M" }, { "family_name": "Rossetti", "given_name": "M.", "clpid": "Rossetti-M" }, { "family_name": "Roudier", "given_name": "G.", "clpid": "Roudier-G" }, { "family_name": "Rowan-Robinson", "given_name": "M.", "clpid": "Rowan-Robinson-M" }, { "family_name": "Rubi\u00f1o-Martin", "given_name": "J. A.", "clpid": "Rubi\u00f1o-Martin-J-A" }, { "family_name": "Rusholme", "given_name": "B.", "orcid": "0000-0001-7648-4142", "clpid": "Rusholme-Benjamin" }, { "family_name": "Sandri", "given_name": "M.", "clpid": "Sandri-M" }, { "family_name": "Santos", "given_name": "D.", "clpid": "Santos-D" }, { "family_name": "Savelainen", "given_name": "M.", "clpid": "Savelainen-M" }, { "family_name": "Savini", "given_name": "G.", "clpid": "Savini-G" }, { "family_name": "Schwarz", "given_name": "R.", "clpid": "Schwarz-R" }, { "family_name": "Scott", "given_name": "D.", "orcid": "0000-0002-6878-9840", "clpid": "Scott-Douglas" }, { "family_name": "Seiffert", "given_name": "M. D.", "clpid": "Seiffert-M-D" }, { "family_name": "Sheehy", "given_name": "C. D.", "clpid": "Sheehy-C-D" }, { "family_name": "Spencer", "given_name": "L. D.", "clpid": "Spencer-L-D" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Stolyarov", "given_name": "V.", "clpid": "Stolyarov-V" }, { "family_name": "Sudiwala", "given_name": "R.", "clpid": "Sudiwala-R" }, { "family_name": "Sunyaev", "given_name": "R. A.", "clpid": "Sunyaev-R-A" }, { "family_name": "Sutton", "given_name": "D.", "clpid": "Sutton-D" }, { "family_name": "Suur-Uski", "given_name": "A.-S.", "clpid": "Suur-Uski-A-S" }, { "family_name": "Sygnet", "given_name": "J.-F.", "clpid": "Sygnet-J-F" }, { "family_name": "Tauber", "given_name": "J. A.", "clpid": "Tauber-J-A" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" }, { "family_name": "Terenzi", "given_name": "L.", "clpid": "Terenzi-L" }, { "family_name": "Thompson", "given_name": "K. L.", "clpid": "Thompson-K-L" }, { "family_name": "Toffolatti", "given_name": "L.", "clpid": "Toffolatti-L" }, { "family_name": "Tolan", "given_name": "J. E.", "clpid": "Tolan-J-E" }, { "family_name": "Tomasi", "given_name": "M.", "clpid": "Tomasi-M" }, { "family_name": "Tristram", "given_name": "M.", "clpid": "Tristram-M" }, { "family_name": "Tucci", "given_name": "M.", "clpid": "Tucci-M" }, { "family_name": "Turner", "given_name": "A. D.", "clpid": "Turner-A-D" }, { "family_name": "Valenziano", "given_name": "L.", "clpid": "Valenziano-L" }, { "family_name": "Valiviita", "given_name": "J.", "clpid": "Valiviita-J" }, { "family_name": "Van Tent", "given_name": "B.", "clpid": "Van-Tent-B" }, { "family_name": "Vibert", "given_name": "L.", "clpid": "Vibert-L" }, { "family_name": "Vielva", "given_name": "P.", "clpid": "Vielva-P" }, { "family_name": "Vieregg", "given_name": "A. G.", "clpid": "Vieregg-A-G" }, { "family_name": "Villa", "given_name": "F.", "clpid": "Villa-F" }, { "family_name": "Wade", "given_name": "L. A.", "clpid": "Wade-L-A" }, { "family_name": "Wandelt", "given_name": "B. D.", "orcid": "0000-0002-5854-8269", "clpid": "Wandelt-Benjamin-D" }, { "family_name": "Watson", "given_name": "R.", "clpid": "Watson-R" }, { "family_name": "Weber", "given_name": "A. C.", "clpid": "Weber-A-C" }, { "family_name": "Wehus", "given_name": "I. K.", "clpid": "Wehus-I-K" }, { "family_name": "White", "given_name": "M.", "clpid": "White-M" }, { "family_name": "White", "given_name": "S. D. M.", "clpid": "White-S-D-M" }, { "family_name": "Willmert", "given_name": "J.", "clpid": "Willmert-J" }, { "family_name": "Wong", "given_name": "C. L.", "clpid": "Wong-C-L" }, { "family_name": "Yoon", "given_name": "K. W.", "clpid": "Yoon-K-W" }, { "family_name": "Yvon", "given_name": "D.", "clpid": "Yvon-D" }, { "family_name": "Zacchei", "given_name": "A.", "clpid": "Zacchei-A" }, { "family_name": "Zonca", "given_name": "A.", "clpid": "Zonca-A" }, { "literal": "Planck Collaboration" }, { "literal": "BICEP2 Collaboration" } ], "abstract": "We report the results of a joint analysis of data from BICEP2/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400\u2009\u2009deg2 patch of sky centered on RA 0 h, Dec. \u221257.5\u00b0. The combined maps reach a depth of 57 nK deg in Stokes Q and U in a band centered at 150 GHz. Planck has observed the full sky in polarization at seven frequencies from 30 to 353 GHz, but much less deeply in any given region (1.2\u2009\u2009\u03bcK deg in Q and U at 143 GHz). We detect 150\u00d7353 cross-correlation in B modes at high significance. We fit the single- and cross-frequency power spectra at frequencies \u2265150\u2009\u2009GHz to a lensed-\u039bCDM model that includes dust and a possible contribution from inflationary gravitational waves (as parametrized by the tensor-to-scalar ratio r), using a prior on the frequency spectral behavior of polarized dust emission from previous Planck analysis of other regions of the sky. We find strong evidence for dust and no statistically significant evidence for tensor modes. We probe various model variations and extensions, including adding a synchrotron component in combination with lower frequency data, and find that these make little difference to the r constraint. Finally, we present an alternative analysis which is similar to a map-based cleaning of the dust contribution, and show that this gives similar constraints. The final result is expressed as a likelihood curve for r, and yields an upper limit r0.05<0.12 at 95% confidence. Marginalizing over dust and r, lensing B modes are detected at 7.0\u03c3 significance.", "doi": "10.1103/PhysRevLett.114.101301", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2015-03-09", "series_number": "10", "volume": "114", "issue": "10", "pages": "Art. No. 101301" }, { "id": "authors:tbeze-63v69", "collection": "authors", "collection_id": "tbeze-63v69", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150501-151404970", "type": "article", "title": "Maximum likelihood analysis of low energy CDMS II germanium data", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "We report on the results of a search for a Weakly Interacting Massive Particle (WIMP) signal in low-energy data of the Cryogenic Dark Matter Search experiment using a maximum likelihood analysis. A background model is constructed using GEANT4 to simulate the surface-event background from ^(210)Pb decay-chain events, while using independent calibration data to model the gamma background. Fitting this background model to the data results in no statistically significant WIMP component. In addition, we perform fits using an analytic ad hoc background model proposed by Collar and Fields, who claimed to find a large excess of signal-like events in our data. We confirm the strong preference for a signal hypothesis in their analysis under these assumptions, but excesses are observed in both single- and multiple-scatter events, which implies the signal is not caused by WIMPs, but rather reflects the inadequacy of their background model.", "doi": "10.1103/PhysRevD.91.052021", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2015-03-01", "series_number": "5", "volume": "91", "issue": "5", "pages": "Art. No. 052021" }, { "id": "authors:xk7rp-3pf45", "collection": "authors", "collection_id": "xk7rp-3pf45", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140925-103717168", "type": "article", "title": "BICEP2. II. Experiment and three-year Data Set", "author": [ { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hildebrandt", "given_name": "S. R.", "clpid": "Hildebrant-S-R" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" }, { "literal": "BICEP2 Collaboration" } ], "abstract": "We report on the design and performance of the BICEP2 instrument and on its three-year data set. BICEP2 was designed to measure the polarization of the cosmic microwave background (CMB) on angular scales of 1\u00b0-5\u00b0(\u2113 = 40-200), near the expected peak of the B-mode polarization signature of primordial gravitational waves from cosmic inflation. Measuring B-modes requires dramatic improvements in sensitivity combined with exquisite control of systematics. The BICEP2 telescope observed from the South Pole with a 26 cm aperture and cold, on-axis, refractive optics. BICEP2 also adopted a new detector design in which beam-defining slot antenna arrays couple to transition-edge sensor (TES) bolometers, all fabricated on a common substrate. The antenna-coupled TES detectors supported scalable fabrication and multiplexed readout that allowed BICEP2 to achieve a high detector count of 500 bolometers at 150 GHz, giving unprecedented sensitivity to B-modes at degree angular scales. After optimization of detector and readout parameters, BICEP2 achieved an instrument noise-equivalent temperature of 15.8 \u00b5K\u221as. The full data set reached Stokes Q and U map depths of 87.2 nK in square-degree pixels (5.'2 \u03bcK) over an effective area of 384 deg^2 within a 1000 deg^2 field. These are the deepest CMB polarization maps at degree angular scales to date. The power spectrum analysis presented in a companion paper has resulted in a significant detection of B-mode polarization at degree scales.", "doi": "10.1088/0004-637X/792/1/62", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2014-09-01", "series_number": "1", "volume": "792", "issue": "1", "pages": "Art. No. 62" }, { "id": "authors:503k1-qr171", "collection": "authors", "collection_id": "503k1-qr171", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140904-085850464", "type": "article", "title": "A Distributed Method for Modeling Effective Cryogenic Flat Cable Heat Sinking", "author": [ { "family_name": "Zobrist", "given_name": "N. R.", "clpid": "Zobrist-N-R" }, { "family_name": "Daal", "given_name": "M.", "orcid": "0000-0002-1134-2116", "clpid": "Daal-M" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "A common challenge in low temperature instrumentation is adequately heat sinking signal wires between room temperature and devices at base temperature. Using cryostat space for adequate heat sinking typically comes at the cost of complexity or experimental space. As such, it is useful to know how much heat sinking is adequate given the materials, heat sources and cooling capacities involved. We present a differential equation for modeling the heat flowing out of a flat cable along an interval over which it is adhered to an insulating interface which is bound to a metallic heat sinking surface and numerical results for realistic heat sinks in the Kelvin range. We also present a computational method for solving this differential equation.", "doi": "10.1007/s10909-013-0995-2", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2014-09", "series_number": "5-6", "volume": "176", "issue": "5-6", "pages": "1096-1102" }, { "id": "authors:jrfd7-fsh71", "collection": "authors", "collection_id": "jrfd7-fsh71", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20141212-144209417", "type": "article", "title": "Review of Particle Physics", "author": [ { "family_name": "Olive", "given_name": "K. A.", "clpid": "Olive-K-A" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Vogel", "given_name": "P.", "orcid": "0000-0003-0587-5466", "clpid": "Vogel-P" }, { "family_name": "Zhu", "given_name": "R. Y.", "orcid": "0000-0003-3091-7461", "clpid": "Zhu-Ren-Yuan" }, { "literal": "Particle Data Group" } ], "abstract": "The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,283 new measurements from 899 Japers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as heavy neutrinos, supersymmetric and technicolor particles, axions, dark photons, etc. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as Supersymmetry, Extra Dimensions, Particle Detectors, Probability, and Statistics. Among the 112 reviews are many that are new or heavily revised including those on: Dark Energy, Higgs Boson Physics, Electroweak Model, Neutrino Cross Section Measurements, Monte Carlo Neutrino Generators, Top Quark, Dark Matter, Dynamical Electroweak Symmetry Breaking, Accelerator Physics of Colliders, High-Energy Collider Parameters, Big Bang Nucleosynthesis, Astrophysical Constants and Cosmological Parameters.", "doi": "10.1088/1674-1137/38/9/090001", "issn": "1674-1137", "publisher": "IOP Publishing", "publication": "Chinese Physics C", "publication_date": "2014-09", "series_number": "9", "volume": "38", "issue": "9", "pages": "Art. No. 090001" }, { "id": "authors:2bcg1-t7a13", "collection": "authors", "collection_id": "2bcg1-t7a13", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140129-101650521", "type": "article", "title": "Particle Detection Using MKID-Based Athermal-Phonon Mediated Detectors", "author": [ { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-B" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-P-K" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "We are developing athermal-phonon mediated particle detectors that utilize microwave kinetic inductance detectors (MKIDs) as phonon sensors. MKIDs afford natural frequency domain multiplexing, which allows for massive substrates to be patterned with hundreds of sensors while keeping readout complexity to a minimum. Previously, our 2 cm \u00d7 2 cm \u00d7 1 mm proof-of-principle device utilized 20 MKIDs and, from the magnitude and timing of their response, we were able to reconstruct the position of a particle interaction to < 1 mm. From this, we corrected for variations in detector response across the device and measured an energy resolution of \u03c3_E = 0.55 keV at 30 keV. We have designed and fabricated a new 3-inch prototype device that utilizes 256 MKID sensors, and we present results from its initial testing. Applications include rare event searches, such as the direct detection of dark matter and neutrinoless double beta decay, as well as hard X-ray/soft \u03b3-ray astrophysics.", "doi": "10.1007/s10909-013-1039-7", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2014-09", "series_number": "5-6", "volume": "176", "issue": "5-6", "pages": "891-897" }, { "id": "authors:k2enq-aqm12", "collection": "authors", "collection_id": "k2enq-aqm12", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140905-092002049", "type": "article", "title": "Material Selection for Cryogenic Support Structures", "author": [ { "family_name": "Kramer", "given_name": "Erik", "clpid": "Kramer-Erik" }, { "family_name": "Kellaris", "given_name": "Nicholas", "clpid": "Kellaris-N" }, { "family_name": "Daal", "given_name": "Miguel", "orcid": "0000-0002-1134-2116", "clpid": "Daal-M" }, { "family_name": "Sadoulet", "given_name": "Bernard", "clpid": "Sadoulet-B" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "Matthew", "clpid": "Hollister-M-I" } ], "abstract": "Design specifications for the support structures of low temperature instrumentation often call for low thermal conductivity between temperature stages, high stiffness, and specific load bearing capabilities. While overall geometric design plays an important role in both overall stiffness and heat conduction between stages, material selection can affect a structure's properties significantly. In this contribution, we suggest and compare several alternative materials to the current standard materials for building cryogenic support structures.", "doi": "10.1007/s10909-013-1052-x", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2014-09", "series_number": "5-6", "volume": "176", "issue": "5-6", "pages": "1103-1108" }, { "id": "authors:a4bb3-qnt62", "collection": "authors", "collection_id": "a4bb3-qnt62", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150615-105627198", "type": "book_section", "title": "Keck array and BICEP3: spectral characterization of 5000+ detectors", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII", "author": [ { "family_name": "Karkare", "given_name": "K. S.", "orcid": "0000-0002-5215-6993", "clpid": "Karkare-K-S" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hildebrandt", "given_name": "S. R.", "clpid": "Hildebrant-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Hui", "given_name": "H.", "clpid": "Hui-Howard" }, { "family_name": "Kefeli", "given_name": "S.", "clpid": "Kefeli-S" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Mason", "given_name": "P.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" }, { "family_name": "Weber", "given_name": "A.", "clpid": "Weber-A" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "The inflationary paradigm of the early universe predicts a stochastic background of gravitational waves which would generate a B-mode polarization pattern in the cosmic microwave background (CMB) at degree angular scales. Precise measurement of B-modes is one of the most compelling observational goals in modern cosmology. Since 2011, the Keck Array has deployed over 2500 transition edge sensor (TES) bolometer detectors at 100 and 150 GHz to the South Pole in pursuit of degree-scale B-modes, and Bicep3 will follow in 2015 with 2500 more at 100 GHz. Characterizing the spectral response of these detectors is important for controlling systematic effects that could lead to leakage from the temperature to polarization signal, and for understanding potential coupling to atmospheric and astrophysical emission lines. We present complete spectral characterization of the Keck Array detectors, made with a Martin-Puplett Fourier Transform Spectrometer at the South Pole, and preliminary spectra of Bicep3 detectors taken in lab. We show band centers and effective bandwidths for both Keck Array bands, and use models of the atmosphere at the South Pole to cross check our absolute calibration. Our procedure for obtaining interferograms in the field with automated 4-axis coupling to the focal plane represents an important step towards efficient and complete spectral characterization of next-generation instruments more than 10000 detectors.", "doi": "10.1117/12.2056779", "isbn": "978-0-8194-9621-8", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-08-19", "pages": "Art. No. 91533B" }, { "id": "authors:qs1cf-e9h67", "collection": "authors", "collection_id": "qs1cf-e9h67", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150615-094055757", "type": "book_section", "title": "BICEP2 and Keck Array: upgrades and improved beam characterization", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII", "author": [ { "family_name": "Buder", "given_name": "I.", "clpid": "Buder-I" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hildebrandt", "given_name": "S. R.", "clpid": "Hildebrant-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Hui", "given_name": "H.", "clpid": "Hui-Howard" }, { "family_name": "Kefeli", "given_name": "S.", "clpid": "Kefeli-S" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Mason", "given_name": "P.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" }, { "family_name": "Weber", "given_name": "A. C.", "clpid": "Weber-A-C" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "Searching for evidence of inflation by measuring B-modes in the cosmic microwave background (CMB) polarization at degree angular scales remains one of the most compelling experimental challenges in cosmology. BICEP2 and the Keck Array are part of a program of experiments at the South Pole whose main goal is to achieve the sensitivity and systematic control necessary for measurements of the tensor-to-scalar ratio at \u03c3(r) ~0:01. Beam imperfections that are not sufficiently accounted for are a potential source of spurious polarization that could interfere with that goal. The strategy of BICEP2 and the Keck Array is to completely characterize their telescopes' polarized beam response with a combination of in-lab, pre-deployment, and on-site calibrations. We report the status of these experiments, focusing on continued improved understanding of their beams. Far-field measurements of the BICEP2 beam with a chopped thermal source, combined with analysis improvements, show that the level of residual beam-induced systematic errors is acceptable for the goal of \u03c3(r)~ 0:01 measurements. Beam measurements of the Keck Array side lobes helped identify a way to reduce optical loading with interior cold baffles, which we installed in late 2013. These baffles reduced total optical loading, leading to a ~ 10% increase in mapping speed for the 2014 observing season. The sensitivity of the Keck Array continues to improve: for the 2013 season it was 9:5 \u03bcK _/s noise equivalent temperature (NET). In 2014 we converted two of the 150-GHz cameras to 100 GHz for foreground separation capability. We have shown that the BICEP2 and the Keck Array telescope technology is sufficient for the goal of \u03c3(r) ~ 0:01 measurements. Furthermore, the program is continuing with BICEP3, a 100-GHz telescope with 2560 detectors.", "doi": "10.1117/12.2055713", "isbn": "978-0-8194-9621-8", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-08-19", "pages": "Art. No. 915312" }, { "id": "authors:vv8dd-wt142", "collection": "authors", "collection_id": "vv8dd-wt142", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150616-085656630", "type": "book_section", "title": "The Status of MUSIC: The Multiwavelength Sub/millimeter Inductance Camera", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII", "author": [ { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Duan", "given_name": "Ran P.", "clpid": "Duan-Ran-P" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "Matt I.", "clpid": "Hollister-M-I" }, { "family_name": "Lam", "given_name": "Albert", "clpid": "Lam-Albert" }, { "family_name": "Miller", "given_name": "David A.", "clpid": "Miller-D-A" }, { "family_name": "Schlaerth", "given_name": "James A.", "clpid": "Schlaerth-J-A" }, { "family_name": "Siegel", "given_name": "Seth R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Vayonakis", "given_name": "Anastasios", "clpid": "Vayonakis-A" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "The Multiwavelength Sub/millimeter Inductance Camera (MUSIC) is a four-band photometric imaging camera operating from the Caltech Submillimeter Observatory (CSO). MUSIC is designed to utilize 2304 microwave kinetic inductance detectors (MKIDs), with 576 MKIDs for each observing band centered on 150, 230, 290, and 350 GHz. MUSIC's field of view (FOV) is 14\u2032 square, and the point-spread functions (PSFs) in the four observing bands have 45\u2032\u2032, 31\u2032\u2032, 25\u2032\u2032, and 22\u2032\u2032 full-widths at half maximum (FWHM). The camera was installed in April 2012 with 25% of its nominal detector count in each band, and has subsequently completed three short sets of engineering observations and one longer duration set of early science observations. Recent results from on-sky characterization of the instrument during these observing runs are presented, including achieved map- based sensitivities from deep integrations, along with results from lab-based measurements made during the same period. In addition, recent upgrades to MUSIC, which are expected to significantly improve the sensitivity of the camera, are described.", "doi": "10.1117/12.2055444", "isbn": "978-0-8194-9621-8", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-08-19", "pages": "Art. No. 915304" }, { "id": "authors:xag80-mh383", "collection": "authors", "collection_id": "xag80-mh383", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140731-125447878", "type": "article", "title": "A Comparison of Fundamental Noise in Kinetic Inductance Detectors and Transition Edge Sensors for Millimeter-Wave Applications", "author": [ { "family_name": "Lowitz", "given_name": "A. E.", "clpid": "Lowitz-A-E" }, { "family_name": "Barrentine", "given_name": "E. M.", "clpid": "Barrentine-E-M" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Timbie", "given_name": "P. T.", "clpid": "Timbie-P-T" } ], "abstract": "Kinetic inductance detectors (KIDs) show promise as a competitive technology for astronomical observations over a wide range of wavelengths. We are interested in comparing the fundamental limitations to the sensitivity of KIDs with that of transition edge sensors (TESs) at millimeter wavelengths, specifically over the wavelengths required for studies of the Cosmic Microwave Background (CMB). We calculate the total fundamental noise arising from optical and thermal excitations in TESs and KIDs for a variety of bath temperatures and optical loading scenarios for applications at millimeter wavelengths. Special consideration is given to the case of ground-based observations of 100 GHz radiation with a 100 mK bath temperature, conditions consistent with the planned second module of the QUBIC telescope, a CMB instrument Battistelli (Astropart Phys 34:705, 2011). Under these conditions, a titanium nitride KID with optimized critical temperature pays a few percent noise penalty compared to a typical optimized TES.", "doi": "10.1007/s10909-014-1133-5", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2014-08", "series_number": "3-4", "volume": "176", "issue": "3-4", "pages": "504-510" }, { "id": "authors:z1kkj-f4r44", "collection": "authors", "collection_id": "z1kkj-f4r44", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140731-145844209", "type": "article", "title": "Detector Fabrication Yield for SuperCDMS Soudan", "author": [ { "family_name": "Brink", "given_name": "P. L.", "clpid": "Brink-P-L" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "The SuperCDMS collaboration is presently operating a 9 kg Ge payload at the Soudan Underground Laboratory in their direct search for dark matter. The Ge detectors utilize double-sided athermal phonon sensors with an interdigitated electrode structure (iZIPs) to reject near-surface electron-recoil events. These detectors each have a mass of 0.6 kg and were fabricated with photolithographic techniques. The detector fabrication advances required and the production yield encountered are described.", "doi": "10.1007/s10909-014-1100-1", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2014-08", "series_number": "3-4", "volume": "176", "issue": "3-4", "pages": "194-200" }, { "id": "authors:7d4ay-66704", "collection": "authors", "collection_id": "7d4ay-66704", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140801-074000111", "type": "article", "title": "Sub-Kelvin Thermal Conductivity and Radioactivity of Some Useful Materials in Low Background Cryogenic Experiments", "author": [ { "family_name": "Kellaris", "given_name": "N.", "clpid": "Kellaris-N" }, { "family_name": "Daal", "given_name": "M.", "orcid": "0000-0002-1134-2116", "clpid": "Daal-M" }, { "family_name": "Epland", "given_name": "M.", "clpid": "Epland-M" }, { "family_name": "Pepin", "given_name": "M.", "clpid": "Pepin-M" }, { "family_name": "Kamaev", "given_name": "O.", "clpid": "Kamaev-O" }, { "family_name": "Cushman", "given_name": "P.", "clpid": "Cushman-P" }, { "family_name": "Kramer", "given_name": "E.", "clpid": "Kramer-Erik" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Mirabolfathi", "given_name": "N.", "clpid": "Mirabolfathi-N" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Runyan", "given_name": "M.", "clpid": "Runyan-M" } ], "abstract": "We present measurements of the thermal conductivity between 0.05 and 1 K, and radioactive contamination levels, for some thermally isolating materials. TIMET Ti 15-3-3-3, Mersen grade 2020 graphite, Vespel SP-1, Vespel SP-22, Vespel SCP-5000, Vespel SCP-5050, Graphlite CFRP, and a Kapton/epoxy composite are all investigated. Thermal conductivities were measured using a single-heater longitudinal heat flow method. Material radioactivity was determined for the materials at a low background counting facility using a high-purity gamma detector and GEANT4 Monte Carlo simulations.", "doi": "10.1007/s10909-013-1048-6", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2014-08", "series_number": "3-4", "volume": "176", "issue": "3-4", "pages": "201-208" }, { "id": "authors:251gy-e8978", "collection": "authors", "collection_id": "251gy-e8978", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150616-144926446", "type": "book_section", "title": "Anti-reflection coatings for submillimeter silicon lenses", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII", "author": [ { "family_name": "Wheeler", "given_name": "Jordan D.", "orcid": "0000-0003-1678-5570", "clpid": "Wheeler-J-D" }, { "family_name": "Koopman", "given_name": "Brian", "clpid": "Koopman-B" }, { "family_name": "Gallardo", "given_name": "Patricio", "clpid": "Gallardo-P" }, { "family_name": "Maloney", "given_name": "Philip R.", "clpid": "Maloney-P-R" }, { "family_name": "Brugger", "given_name": "Spencer", "clpid": "Brugger-S" }, { "family_name": "Cortes-Medellin", "given_name": "German", "clpid": "Cortes-Medellin-G" }, { "family_name": "Datta", "given_name": "Rahul", "clpid": "Datta-R" }, { "family_name": "Dowell", "given_name": "C. Darren", "clpid": "Dowell-C-D" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "McKenney", "given_name": "Chris", "clpid": "McKenney-C" }, { "family_name": "McMahon", "given_name": "Jeffrey J.", "clpid": "McMahon-J-J" }, { "family_name": "Niemack", "given_name": "Mike", "clpid": "Niemack-M" }, { "family_name": "Parshley", "given_name": "Steven", "clpid": "Parshley-S" }, { "family_name": "Stacey", "given_name": "Gordon", "clpid": "Stacey-G-J" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "Low-loss lenses are required for submillimeter astronomical applications, such as instrumentation for CCAT, a 25 m diameter telescope to be built at an elevation of 18,400 ft in Chile. Silicon is a leading candidate for dielectric lenses due to its low transmission loss and high index of refraction; however, the latter can lead to large reflection losses. Additionally, large diameter lenses (up to 40 cm), with substantial curvature present a challenge for fabrication of antireflection coatings. Three anti-reflection coatings are considered: a deposited dielectric coating of Parylene C, fine mesh structures cut with a dicing saw, and thin etched silicon layers (fabricated with deep reactive ion etching) for bonding to lenses. Modeling, laboratory measurements, and practicalities of fabrication for the three coatings are presented and compared. Measurements of the Parylene C anti-reflection coating were found to be consistent with previous studies and can be expected to result in a 6% transmission loss for each interface from 0.787 to 0.908 THz. The thin etched silicon layers and fine mesh structure anti-reflection coatings were designed and fabricated on test silicon wafers and found to have reflection losses less than 1% at each interface from 0.787 to 0.908 THz. The thin etched silicon layers are our preferred method because of high transmission efficiency while having an intrinsically faster fabrication time than fine structures cut with dicing saws, though much work remains to adapt the etched approach to curved surfaces and optics < 4\" in diameter unlike the diced coatings.", "doi": "10.1117/12.2057011", "isbn": "978-0-8194-9621-8", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-07-23", "pages": "Art. No. 91532Z" }, { "id": "authors:6jpmy-44h84", "collection": "authors", "collection_id": "6jpmy-44h84", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150615-091403448", "type": "book_section", "title": "Design of antenna-coupled lumped-element titanium nitride KIDs for long-wavelength multi-band continuum imaging", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII", "author": [ { "family_name": "Ji", "given_name": "C.", "clpid": "Ji-C" }, { "family_name": "Beyer", "given_name": "A.", "clpid": "Beyer-A" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "Many applications in cosmology and astrophysics at millimeter wavelengths \u2014 CMB polarization, studies of galaxy clusters using the Sunyaev-Zeldovich effect, studies of star formation at high redshift and in our local universe and our galaxy\u2014 require large-format arrays of millimeter-wave detectors. Feedhorn, lens-coupled twinslot antenna, and phased-array antenna architectures for receiving mm-wave light present numerous advantages for control of systematics and for simultaneous coverage of both polarizations and/or multiple spectral bands. Simultaneously, kinetic inductance detectors using high-resistivity materials like titanium nitride are an attractive sensor option for large-format arrays because they are highly multiplexable and because their high responsivity can render two-level-system noise subdominant to photon and recombination noise. However, coupling the two is a challenge because of the impedance mismatch between the microstrip exiting these architectures and the high resistivity of titanium nitride. Mitigating direct absorption in the KID is also a challenge. We present a detailed titanium nitride KID design that addresses these challenges. The KID inductor is capacitively coupled to the microstrip in such a way as to form a lossy termination without creating an impedance mismatch. A parallelplate capacitor design mitigates direct absorption, uses hydrogenated amorphous silicon, and yields acceptable two-level-system noise. We show that an optimized design can yield expected sensitivities very close to the fundamental limit from photon and recombination noises for two relevant examples: single spectral band designs appropriate for 90 and 150 GHz for CMB polarization and a multi-spectral-band design that covers 90 GHz to 405 GHz in six bands for SZ effect studies.", "doi": "10.1117/12.2056777", "isbn": "978-0-8194-9621-8", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-07-23", "pages": "Art. No. 915321" }, { "id": "authors:5e0zn-5zg81", "collection": "authors", "collection_id": "5e0zn-5zg81", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180620-083924426", "type": "book_section", "title": "Pre-flight integration and characterization of the SPIDER balloon-borne telescope", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII", "author": [ { "family_name": "Rahlin", "given_name": "A. S.", "clpid": "Rahlin-A-S" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dor\u00e9", "given_name": "O.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Mason", "given_name": "P. V.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Moncelsi", "given_name": "L.", "orcid": "0000-0002-4242-3015", "clpid": "Moncelsi-Lorenzo" }, { "family_name": "Morford", "given_name": "T. A.", "clpid": "Morford-T-A" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "We present the results of integration and characterization of the Spider instrument after the 2013 pre-flight campaign. Spider is a balloon-borne polarimeter designed to probe the primordial gravitational wave signal in the degree-scale B-mode polarization of the cosmic microwave background. With six independent telescopes housing over 2000 detectors in the 94 GHz and 150 GHz frequency bands, Spider will map 7.5% of the sky with a depth of 11 to 14 \u03bcK\u2022arcmin at each frequency, which is a factor of ~5 improvement over Planck. We discuss the integration of the pointing, cryogenic, electronics, and power sub-systems, as well as pre-flight characterization of the detectors and optical systems. Spider is well prepared for a December 2014 flight from Antarctica, and is expected to be limited by astrophysical foreground emission, and not instrumental sensitivity, over the survey region.", "doi": "10.1117/12.2055683", "isbn": "9780819496218", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-07-23", "pages": "Art. No. 915313" }, { "id": "authors:5vdk1-ae915", "collection": "authors", "collection_id": "5vdk1-ae915", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180702-102441486", "type": "book_section", "title": "Pointing control for the SPIDER balloon-borne telescope", "book_title": "Ground-based and Airborne Telescopes V", "author": [ { "family_name": "Shariff", "given_name": "J. A.", "clpid": "Shariff-J-A" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dor\u00e9", "given_name": "O. P.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Mason", "given_name": "P. V.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Moncelsi", "given_name": "L.", "orcid": "0000-0002-4242-3015", "clpid": "Moncelsi-Lorenzo" }, { "family_name": "Morford", "given_name": "T. A.", "clpid": "Morford-T-A" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" } ], "contributor": [ { "family_name": "Stepp", "given_name": "Larry M.", "clpid": "Stepp-L-M" }, { "family_name": "Gilmozzi", "given_name": "Roberto", "clpid": "Gilmozzi-R" } ], "abstract": "We present the technology and control methods developed for the pointing system of the Spider experiment. Spider is a balloon-borne polarimeter designed to detect the imprint of primordial gravitational waves in the polarization of the Cosmic Microwave Background radiation. We describe the two main components of the telescope's azimuth drive: the reaction wheel and the motorized pivot. A 13 kHz PI control loop runs on a digital signal processor, with feedback from fibre optic rate gyroscopes. This system can control azimuthal speed with < 0.02 deg/s RMS error. To control elevation, Spider uses stepper-motor-driven linear actuators to rotate the cryostat, which houses the optical instruments, relative to the outer frame. With the velocity in each axis controlled in this way, higher-level control loops on the onboard flight computers can implement the pointing and scanning observation modes required for the experiment. We have accomplished the non-trivial task of scanning a 5000 lb payload sinusoidally in azimuth at a peak acceleration of 0.8 deg/s^2, and a peak speed of 6 deg/s. We can do so while reliably achieving sub-arcminute pointing control accuracy.", "doi": "10.1117/12.2055166", "isbn": "9780819496133", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-07-22", "pages": "Art. No. 91450U" }, { "id": "authors:g6z6h-mqd03", "collection": "authors", "collection_id": "g6z6h-mqd03", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180620-090827558", "type": "book_section", "title": "Attitude determination for balloon-borne experiments", "book_title": "Ground-based and Airborne Telescopes V", "author": [ { "family_name": "Gandilo", "given_name": "N. N.", "clpid": "Gandilo-N-N" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dor\u00e9", "given_name": "O. P.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Mason", "given_name": "P. V.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Moncelsi", "given_name": "L.", "orcid": "0000-0002-4242-3015", "clpid": "Moncelsi-Lorenzo" }, { "family_name": "Morford", "given_name": "T. A.", "clpid": "Morford-T-A" }, { "family_name": "Mroczkowski", "given_name": "T. K.", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" } ], "contributor": [ { "family_name": "Stepp", "given_name": "Larry M.", "clpid": "Stepp-L-M" }, { "family_name": "Gilmozzi", "given_name": "Roberto", "clpid": "Gilmozzi-R" }, { "family_name": "Hall", "given_name": "Helen J.", "clpid": "Hall-H-J" } ], "abstract": "An attitude determination system for balloon-borne experiments is presented. The system provides pointing information in azimuth and elevation for instruments flying on stratospheric balloons over Antarctica. In-flight attitude is given by the real-time combination of readings from star cameras, a magnetometer, sun sensors, GPS, gyroscopes, tilt sensors and an elevation encoder. Post-flight attitude reconstruction is determined from star camera solutions, interpolated by the gyroscopes using an extended Kalman Filter. The multi-sensor system was employed by the Balloon-borne Large Aperture Submillimeter Telescope for Polarimetry (BLASTPol), an experiment that measures polarized thermal emission from interstellar dust clouds. A similar system was designed for the upcoming flight of Spider, a Cosmic Microwave Background polarization experiment. The pointing requirements for these experiments are discussed, as well as the challenges in designing attitude reconstruction systems for high altitude balloon flights. In the 2010 and 2012 BLASTPol flights from McMurdo Station, Antarctica, the system demonstrated an accuracy of < 5' rms in-flight, and < 5\" rms post-flight.", "doi": "10.1117/12.2055156", "isbn": "9780819496133", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-07-22", "pages": "Art. No. 91452U" }, { "id": "authors:f2js5-h3m34", "collection": "authors", "collection_id": "f2js5-h3m34", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180621-083912924", "type": "book_section", "title": "BLASTbus electronics: general-purpose readout and control for balloon-borne experiments", "book_title": "Ground-based and Airborne Telescopes V", "author": [ { "family_name": "Benton", "given_name": "S. J.", "clpid": "Benton-S-J" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dor\u00e9", "given_name": "O. P.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Mason", "given_name": "P. V.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Moncelsi", "given_name": "L.", "orcid": "0000-0002-4242-3015", "clpid": "Moncelsi-Lorenzo" }, { "family_name": "Morford", "given_name": "T. A.", "clpid": "Morford-T-A" }, { "family_name": "Mroczkowski", "given_name": "T. K.", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" } ], "contributor": [ { "family_name": "Stepp", "given_name": "Larry M.", "clpid": "Stepp-L-M" }, { "family_name": "Gilmozzi", "given_name": "Roberto", "clpid": "Gilmozzi-R" }, { "family_name": "Hall", "given_name": "Helen J.", "clpid": "Hall-H-J" } ], "abstract": "We present the second generation BLASTbus electronics. The primary purposes of this system are detector readout, attitude control, and cryogenic housekeeping, for balloon-borne telescopes. Readout of neutron transmutation doped germanium (NTD-Ge) bolometers requires low noise and parallel acquisition of hundreds of analog signals. Controlling a telescope's attitude requires the capability to interface to a wide variety of sensors and motors, and to use them together in a fast, closed loop. To achieve these different goals, the BLASTbus system employs a flexible motherboard-daughterboard architecture. The programmable motherboard features a digital signal processor (DSP) and field-programmable gate array (FPGA), as well as slots for three daughterboards. The daughterboards provide the interface to the outside world, with versions for analog to digital conversion, and optoisolated digital input/output. With the versatility afforded by this design, the BLASTbus also finds uses in cryogenic, thermometry, and power systems. For accurate timing control to tie everything together, the system operates in a fully synchronous manner. BLASTbus electronics have been successfully deployed to the South Pole, and own on stratospheric balloons.", "doi": "10.1117/12.2056693", "isbn": "9780819496133", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-07-22", "pages": "Art. No. 91450V" }, { "id": "authors:jsk5w-zkg37", "collection": "authors", "collection_id": "jsk5w-zkg37", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150615-125634689", "type": "book_section", "title": "Design and construction of a carbon fiber gondola for the SPIDER balloon-borne telescope", "book_title": "Ground-Based and Airborne Telescopes V", "author": [ { "family_name": "Soler", "given_name": "J. D.", "clpid": "Soler-J-D" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dor\u00e9", "given_name": "O. P.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Mason", "given_name": "P. V.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Moncelsi", "given_name": "L.", "orcid": "0000-0002-4242-3015", "clpid": "Moncelsi-Lorenzo" }, { "family_name": "Morford", "given_name": "T.", "clpid": "Morford-T-A" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" }, { "literal": "SPIDER Collaboration" } ], "contributor": [ { "family_name": "Stepp", "given_name": "Larry M.", "clpid": "Stepp-L-M" }, { "family_name": "Gilmozzi", "given_name": "Roberto", "clpid": "Gilmozzi-R" }, { "family_name": "Hall", "given_name": "Helen J.", "clpid": "Hall-H-J" } ], "abstract": "We introduce the light-weight carbon fiber and aluminum gondola designed for the Spider balloon-borne telescope. Spider is designed to measure the polarization of the Cosmic Microwave Background radiation with unprecedented sensitivity and control of systematics in search of the imprint of inflation: a period of exponential expansion in the early Universe. The requirements of this balloon-borne instrument put tight constrains on the mass budget of the payload. The Spider gondola is designed to house the experiment and guarantee its operational and structural integrity during its balloon-borne flight, while using less than 10% of the total mass of the payload. We present a construction method for the gondola based on carbon fiber reinforced polymer tubes with aluminum inserts and aluminum multi-tube joints. We describe the validation of the model through Finite Element Analysis and mechanical tests.", "doi": "10.1117/12.2055413", "isbn": "978-0-8194-9613-3", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2014-06-22", "pages": "Art. No. 91450T" }, { "id": "authors:05xha-ds549", "collection": "authors", "collection_id": "05xha-ds549", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140623-073320912", "type": "article", "title": "Detection of B-Mode Polarization at Degree Angular Scales by BICEP2", "author": [ { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hildebrandt", "given_name": "S. R.", "clpid": "Hildebrant-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Mason", "given_name": "P.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "literal": "BICEP2 Collaboration" } ], "abstract": "We report results from the BICEP2 experiment, a cosmic microwave background (CMB) polarimeter specifically designed to search for the signal of inflationary gravitational waves in the B-mode power spectrum around \u2113\u223c80. The telescope comprised a 26 cm aperture all-cold refracting optical system equipped with a focal plane of 512 antenna coupled transition edge sensor 150 GHz bolometers each with temperature sensitivity of \u2248300\u2009\u2009\u03bcK_(CMB)\u221as. BICEP2 observed from the South Pole for three seasons from 2010 to 2012. A low-foreground region of sky with an effective area of 380 square deg was observed to a depth of 87 nK deg in Stokes Q and U. In this paper we describe the observations, data reduction, maps, simulations, and results. We find an excess of B-mode power over the base lensed-\u039bCDM expectation in the range 30<\u2113<150, inconsistent with the null hypothesis at a significance of >5\u03c3. Through jackknife tests and simulations based on detailed calibration measurements we show that systematic contamination is much smaller than the observed excess. Cross correlating against WMAP 23 GHz maps we find that Galactic synchrotron makes a negligible contribution to the observed signal. We also examine a number of available models of polarized dust emission and find that at their default parameter values they predict power \u223c(5\u201310)\u00d7 smaller than the observed excess signal (with no significant cross-correlation with our maps). However, these models are not sufficiently constrained by external public data to exclude the possibility of dust emission bright enough to explain the entire excess signal. Cross correlating BICEP2 against 100 GHz maps from the BICEP1 experiment, the excess signal is confirmed with 3\u03c3 significance and its spectral index is found to be consistent with that of the CMB, disfavoring dust at 1.7\u03c3. The observed B-mode power spectrum is well fit by a lensed-\u039bCDM+tensor theoretical model with tensor-to-scalar ratio r=0.20^(+0.07)_(\u22120.05), with r=0 disfavored at 7.0\u03c3. Accounting for the contribution of foreground, dust will shift this value downward by an amount which will be better constrained with upcoming data sets.", "doi": "10.1103/PhysRevLett.112.241101", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2014-06-20", "series_number": "24", "volume": "112", "issue": "24", "pages": "Art. No. 241101" }, { "id": "authors:m5yfc-03h94", "collection": "authors", "collection_id": "m5yfc-03h94", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140804-112747999", "type": "article", "title": "Search for Low-Mass Weakly Interacting Massive Particles with SuperCDMS", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "We report a first search for weakly interacting massive particles (WIMPs) using the background rejection capabilities of SuperCDMS. An exposure of 577 kg days was analyzed for WIMPs with mass <30\u2009\u2009GeV/c^2 , with the signal region blinded. Eleven events were observed after unblinding. We set an upper limit on the spin-independent WIMP-nucleon cross section of 1.2\u00d710^( \u221242) \u2009\u2009cm^2 at 8\u2009\u2009GeV/c^2 . This result is in tension with WIMP interpretations of recent experiments and probes new parameter space for WIMP-nucleon scattering for WIMP masses <6\u2009\u2009GeV/c^2.", "doi": "10.1103/PhysRevLett.112.241302", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2014-06-20", "series_number": "24", "volume": "112", "issue": "24", "pages": "Art. No. 241302" }, { "id": "authors:s7h3e-htr77", "collection": "authors", "collection_id": "s7h3e-htr77", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140326-100808471", "type": "article", "title": "Search for Low-Mass Weakly Interacting Massive Particles Using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "SuperCDMS is an experiment designed to directly detect weakly interacting massive particles (WIMPs), a favored candidate for dark matter ubiquitous in the Universe. In this Letter, we present WIMP-search results using a calorimetric technique we call CDMSlite, which relies on voltage-assisted Luke-Neganov amplification of the ionization energy deposited by particle interactions. The data were collected with a single 0.6 kg germanium detector running for ten live days at the Soudan Underground Laboratory. A low energy threshold of 170\u2009\u2009eV_ee (electron equivalent) was obtained, which allows us to constrain new WIMP-nucleon spin-independent parameter space for WIMP masses below 6\u2009\u2009GeV/c^2.", "doi": "10.1103/PhysRevLett.112.041302", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2014-01-31", "series_number": "4", "volume": "112", "issue": "4", "pages": "Art. No. 041302" }, { "id": "authors:t2pcj-d9k74", "collection": "authors", "collection_id": "t2pcj-d9k74", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130805-073648808", "type": "article", "title": "A prototype low-background multiwire proportional chamber", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Bowles", "given_name": "M. A.", "clpid": "Bowles-M-A" }, { "family_name": "Bunker", "given_name": "R.", "clpid": "Bunker-R" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Grant", "given_name": "D. R.", "clpid": "Grant-D-R" }, { "family_name": "Kos", "given_name": "M.", "clpid": "Kos-M" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "family_name": "Rider", "given_name": "A.", "clpid": "Rider-A" }, { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Sotolongo", "given_name": "D.", "clpid": "Sotolongo-D" }, { "family_name": "Wang", "given_name": "B.", "clpid": "Wang-B" }, { "family_name": "Zahn", "given_name": "A.", "clpid": "Zahn-A" } ], "abstract": "A prototype multiwire proportional chamber (MWPC) was developed to demonstrate the feasibility of constructing a radiopure time projection chamber with MWPC track readout to assay materials for alpha- and beta-emitting surface contaminants for future rare-event-search experiments as well as other scientific fields. The design features and assembly techniques described here are motivated by the position and energy resolution required to reconstruct alpha and beta tracks while efficiently rejecting backgrounds. Results from a test setup using an ^(55)Fe x-ray source indicate excellent operational stability and a near-ideal energy resolution of 15.8% FWHM at 5.89 keV and a gas gain of ~10^4.", "doi": "10.1088/1748-0221/9/01/P01009", "issn": "1748-0221", "publisher": "International School of Advanced Studies", "publication": "Journal of Instrumentation", "publication_date": "2014-01", "series_number": "1", "volume": "9", "issue": "1", "pages": "Art. No. P01009" }, { "id": "authors:h4t2j-xws05", "collection": "authors", "collection_id": "h4t2j-xws05", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140122-093108474", "type": "article", "title": "Silicon Detector Dark Matter Results from the Final Exposure of CDMS II", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "literal": "CDMS Collaboration" } ], "abstract": "We report results of a search for weakly interacting massive particles (WIMPS) with the silicon detectors of the CDMS II experiment. This blind analysis of 140.2 kg day of data taken between July 2007 and September 2008 revealed three WIMP-candidate events with a surface-event background estimate of 0.41^(+0.20)_(\u22120.08)(stat)^(+0.28)_(\u22120.24)(syst). Other known backgrounds from neutrons and ^(206)Pb are limited to <0.13 and <0.08 events at the 90% confidence level, respectively. The exposure of this analysis is equivalent to 23.4 kg day for a recoil energy range of 7\u2013100 keV for a WIMP of mass 10\u2009\u2009GeV/c^2. The probability that the known backgrounds would produce three or more events in the signal region is 5.4%. A profile likelihood ratio test of the three events that includes the measured recoil energies gives a 0.19% probability for the known-background-only hypothesis when tested against the alternative WIMP+background hypothesis. The highest likelihood occurs for a WIMP mass of 8.6\u2009\u2009GeV/c2 and WIMP-nucleon cross section of 1.9\u00d710^(\u221241)\u2009\u2009cm^2.", "doi": "10.1103/PhysRevLett.111.251301", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2013-12-16", "series_number": "25", "volume": "111", "issue": "25", "pages": "Art. No. 251301" }, { "id": "authors:qe785-gv857", "collection": "authors", "collection_id": "qe785-gv857", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20131212-125628354", "type": "article", "title": "A Measurement of the Kinetic Sunyaev-Zel'dovich Signal Toward MACS J0717.5+3745", "author": [ { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Mroczkowski", "given_name": "T.", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "Zemcov", "given_name": "M.", "orcid": "0000-0001-8253-1451", "clpid": "Zemcov-M" }, { "family_name": "Korngut", "given_name": "P. M.", "clpid": "Korngut-P-M" }, { "family_name": "Bock", "given_name": "J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Bulbul", "given_name": "E.", "clpid": "Bulbul-Esra" }, { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Egami", "given_name": "E.", "clpid": "Egami-Eichi" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Koch", "given_name": "P. M.", "orcid": "0000-0003-2777-5861", "clpid": "Koch-P-M" }, { "family_name": "Lin", "given_name": "K.-Y.", "orcid": "0000-0002-8698-7277", "clpid": "Lin-Kai-Yang" }, { "family_name": "Mantz", "given_name": "A.", "orcid": "0000-0002-8031-1217", "clpid": "Mantz-A-B" }, { "family_name": "Molnar", "given_name": "S. M.", "orcid": "0000-0002-4227-956X", "clpid": "Molnar-S-M" }, { "family_name": "Moustakas", "given_name": "L.", "orcid": "0000-0003-3030-2360", "clpid": "Moustakas-L-A" }, { "family_name": "Pierpaoli", "given_name": "E.", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Rawle", "given_name": "T. D.", "clpid": "Rawle-T-D" }, { "family_name": "Reese", "given_name": "E. D.", "orcid": "0000-0002-8700-7082", "clpid": "Reese-E-D" }, { "family_name": "Rex", "given_name": "M.", "clpid": "Rex-M" }, { "family_name": "Shitanishi", "given_name": "J. A.", "clpid": "Shitanishi-Jennifer-A" }, { "family_name": "Siegel", "given_name": "S. R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Umetsu", "given_name": "K.", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" } ], "abstract": "We report our analysis of MACS J0717.5+3745 using 140 and 268 GHz Bolocam data collected at the Caltech Submillimeter Observatory. We detect extended Sunyaev-Zel'dovich (SZ) effect signal at high significance in both Bolocam bands, and we employ Herschel-SPIRE observations to subtract the signal from dusty background galaxies in the 268 GHz data. We constrain the two-band SZ surface brightness toward two of the sub-clusters of MACS J0717.5+3745: the main sub-cluster (named C), and a sub-cluster identified in spectroscopic optical data to have a line-of-sight velocity of +3200 km s^(\u20131) (named B). We determine the surface brightness in two separate ways: via fits of parametric models and via direct integration of the images. For both sub-clusters, we find consistent surface brightnesses from both analysis methods. We constrain spectral templates consisting of relativistically corrected thermal and kinetic SZ signals, using a jointly-derived electron temperature from Chandra and XMM-Newton under the assumption that each sub-cluster is isothermal. The data show no evidence for a kinetic SZ signal toward sub-cluster C, but they do indicate a significant kinetic SZ signal toward sub-cluster B. The model-derived surface brightnesses for sub-cluster B yield a best-fit, line-of-sight velocity of v_z = +3450 \u00b1 900 km s^(\u20131), with (1 \u2013 Prob[v_z \u2265 0]) = 1.3 \u00d7 10^(\u20135) (4.2\u03c3 away from 0 for a Gaussian distribution). The directly integrated sub-cluster B SZ surface brightnesses provide a best-fit v_z = +2550 \u00b1 1050 km s^(\u20131), with (1 \u2013 Prob[vz \u2265 0]) = 2.2 \u00d7 10^(\u20133) (2.9\u03c3).", "doi": "10.1088/0004-637X/778/1/52", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2013-11-20", "series_number": "1", "volume": "778", "issue": "1", "pages": "Art. No. 52" }, { "id": "authors:c0eyy-5mr20", "collection": "authors", "collection_id": "c0eyy-5mr20", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20131122-105614104", "type": "article", "title": "CLASH: Complete Lensing Analysis of the Largest Cosmic Lens MACS J0717.5+3745 and Surrounding Structures", "author": [ { "family_name": "Medezinski", "given_name": "Elinor", "clpid": "Medezinski-E" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Mroczkowski", "given_name": "Tony", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "Czakon", "given_name": "Nicole", "clpid": "Czakon-N-G" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "The galaxy cluster MACS J0717.5+3745 (z = 0.55) is the largest known cosmic lens, with complex internal structures seen in deep X-ray, Sunyaev-Zel'dovich effect, and dynamical observations. We perform a combined weak- and strong-lensing analysis with wide-field BVR_ci'z' Subaru/Suprime-Cam observations and 16-band Hubble Space Telescope observations taken as part of the Cluster Lensing And Supernova survey with Hubble. We find consistent weak distortion and magnification measurements of background galaxies and combine these signals to construct an optimally estimated radial mass profile of the cluster and its surrounding large-scale structure out to 5 Mpc h^(\u20131). We find consistency between strong-lensing and weak-lensing in the region where these independent data overlap, <500 kpc h^(\u20131). The two-dimensional weak-lensing map reveals a clear filamentary structure traced by distinct mass halos. We model the lensing shear field with nine halos, including the main cluster, corresponding to mass peaks detected above 2.5\u03c3_\u03ba. The total mass of the cluster as determined by the different methods is M_(vir) \u2248 (2.8 \u00b1 0.4) \u00d7 10^(15) M_\u2609. Although this is the most massive cluster known at z > 0.5, in terms of extreme value statistics, we conclude that the mass of MACS J0717.5+3745 by itself is not in serious tension with \u039bCDM, representing only a ~2\u03c3 departure above the maximum simulated halo mass at this redshift.", "doi": "10.1088/0004-637X/777/1/43", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2013-11-01", "series_number": "1", "volume": "777", "issue": "1", "pages": "Art. No. 43" }, { "id": "authors:2hpqf-e6s67", "collection": "authors", "collection_id": "2hpqf-e6s67", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200731-154624106", "type": "monograph", "title": "Snowmass CF1 Summary: WIMP Dark Matter Direct Detection", "author": [ { "family_name": "Cushman", "given_name": "P.", "clpid": "Cushman-P" }, { "family_name": "Galbiati", "given_name": "C." }, { "family_name": "McKinsey", "given_name": "D. N." }, { "family_name": "Robertson", "given_name": "H." }, { "family_name": "Tait", "given_name": "T. M. P." }, { "family_name": "Bauer", "given_name": "D." }, { "family_name": "Borgland", "given_name": "A." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Calaprice", "given_name": "F." }, { "family_name": "Cooley", "given_name": "J." }, { "family_name": "Empl", "given_name": "T." }, { "family_name": "Essig", "given_name": "R." }, { "family_name": "Figueroa-Feliciano", "given_name": "E." }, { "family_name": "Gaitskell", "given_name": "R." }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hall", "given_name": "J." }, { "family_name": "Hill", "given_name": "R." }, { "family_name": "Hime", "given_name": "A." }, { "family_name": "Hoppe", "given_name": "E." }, { "family_name": "Hsu", "given_name": "L." }, { "family_name": "Hungerford", "given_name": "E." }, { "family_name": "Jacobsen", "given_name": "R." }, { "family_name": "Kelsey", "given_name": "M." }, { "family_name": "Lang", "given_name": "R. F." }, { "family_name": "Lippincott", "given_name": "W. H." }, { "family_name": "Loer", "given_name": "B." }, { "family_name": "Luitz", "given_name": "S." }, { "family_name": "Mandic", "given_name": "V." }, { "family_name": "Mardon", "given_name": "J." }, { "family_name": "Maricic", "given_name": "J." }, { "family_name": "Maruyama", "given_name": "R." }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Nelson", "given_name": "H." }, { "family_name": "Orrell", "given_name": "J." }, { "family_name": "Palladino", "given_name": "K." }, { "family_name": "Pantic", "given_name": "E." }, { "family_name": "Partridge", "given_name": "R." }, { "family_name": "Ryd", "given_name": "A." }, { "family_name": "Saab", "given_name": "T." }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Schnee", "given_name": "R." }, { "family_name": "Shepherd", "given_name": "W." }, { "family_name": "Sonnenschein", "given_name": "A." }, { "family_name": "Sorensen", "given_name": "P." }, { "family_name": "Szydagis", "given_name": "M." }, { "family_name": "Volansky", "given_name": "T." }, { "family_name": "Witherell", "given_name": "M." }, { "family_name": "Wright", "given_name": "D." }, { "family_name": "Zurek", "given_name": "K.", "orcid": "0000-0002-2629-337X", "clpid": "Zurek-K-M" } ], "abstract": "As part of the Snowmass process, the Cosmic Frontier WIMP Direct Detection subgroup (CF1) has drawn on input from the Cosmic Frontier and the broader Particle Physics community to produce this document. The charge to CF1 was (a) to summarize the current status and projected sensitivity of WIMP direct detection experiments worldwide, (b) motivate WIMP dark matter searches over a broad parameter space by examining a spectrum of WIMP models, (c) establish a community consensus on the type of experimental program required to explore that parameter space, and (d) identify the common infrastructure required to practically meet those goals.", "doi": "10.48550/arXiv.1310.8327", "publisher": "arXiv", "publication_date": "2013-10-30" }, { "id": "authors:3jp5y-34e38", "collection": "authors", "collection_id": "3jp5y-34e38", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20131121-150215822", "type": "article", "title": "Demonstration of surface electron rejection with interleaved germanium detectors for dark matter searches", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "literal": "SuperCDMS Collaboration" } ], "abstract": "The SuperCDMS experiment in the Soudan Underground Laboratory searches for dark matter with a 9-kg array of cryogenic germanium detectors. Symmetric sensors on opposite sides measure both charge and phonons from each particle interaction, providing excellent discrimination between electron and nuclear recoils, and between surface and interior events. Surface event rejection capabilities were tested with two ^(210)Pb sources producing \u223c130 beta decays/hr. In \u223c800 live hours, no events leaked into the 8\u2013115\u2009keV signal region, giving upper limit leakage fraction 1.7\u2009\u00d7\u200910^(\u22125) at 90% C.L., corresponding to\u2009<\u20090.6 surface event background in the future 200-kg SuperCDMS SNOLAB experiment.", "doi": "10.1063/1.4826093", "issn": "0003-6951", "publisher": "American Institute of Physics", "publication": "Applied Physics Letters", "publication_date": "2013-10-14", "series_number": "16", "volume": "103", "issue": "16", "pages": "Art. No. 164105" }, { "id": "authors:ntshh-3kf19", "collection": "authors", "collection_id": "ntshh-3kf19", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20131004-124407612", "type": "article", "title": "Silicon detector results from the first five-tower run of CDMS II", "author": [ { "family_name": "Agnese", "given_name": "R.", "clpid": "Agnese-R" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "literal": "CDMS Collaboration" } ], "abstract": "We report results of a search for weakly interacting massive particles (WIMPs) with the Si detectors of the CDMS II experiment. This report describes a blind analysis of the first data taken with CDMS II's full complement of detectors in 2006\u20132007; results from this exposure using the Ge detectors have already been presented. We observed no candidate WIMP-scattering events in an exposure of 55.9 kg-days before analysis cuts, with an expected background of \u223c1.1 events. The exposure of this analysis is equivalent to 10.3 kg-days over a recoil energy range of 7\u2013100 keV for an ideal Si detector and a WIMP mass of 10\u2009\u2009GeV/c^2. These data set an upper limit of 1.7\u00d710^(-41)\u2009\u2009cm^2 on the WIMP-nucleon spin-independent cross section of a 10\u2009\u2009GeV/c^2 WIMP. These data exclude parameter space for spin-independent WIMP-nucleon elastic scattering that is relevant to recent searches for low-mass WIMPs.", "doi": "10.1103/PhysRevD.88.031104", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2013-08-27", "series_number": "3", "volume": "88", "issue": "3", "pages": "Art. No. 031104" }, { "id": "authors:swe8k-gnz42", "collection": "authors", "collection_id": "swe8k-gnz42", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160419-135528020", "type": "book_section", "title": "The BetaCage, an ultra-sensitive screener for surface contamination", "book_title": "Low Radioactivity Techniques 2013 (LRT 2013)", "author": [ { "family_name": "Bunker", "given_name": "R.", "clpid": "Bunker-R" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Bowles", "given_name": "M. A.", "clpid": "Bowles-M-A" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Grant", "given_name": "D. R.", "clpid": "Grant-D-R" }, { "family_name": "Kos", "given_name": "M.", "clpid": "Kos-M" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Rider", "given_name": "A.", "clpid": "Rider-A" }, { "family_name": "Wang", "given_name": "B.", "clpid": "Wang-B" }, { "family_name": "Zahn", "given_name": "A.", "clpid": "Zahn-A" } ], "contributor": [ { "family_name": "Miramonte", "given_name": "Lino", "clpid": "Miramonte-L" }, { "family_name": "Pandola", "given_name": "Luciano", "clpid": "Pandola-L" } ], "abstract": "Material screening for identifying low-energy electron emitters and alpha-decaying isotopes is now a prerequisite for rare-event searches (e.g., dark-matter direct detection and neutrinoless double-beta decay) for which surface radiocon-tamination has become an increasingly important background. The BetaCage, a gaseous neon time-projection chamber, is a proposed ultra-sensitive (and nondestructive) screener for alpha-and beta-emitting surface contaminants to which existing screening facilities are insufficiently sensitive. Sensitivity goals are 0.1 betas keV^(\u22121) m^(\u22122) day^(\u22121) and 0.1 alphas m^(\u22122) day^(\u22121), with the former limited by Compton scattering of photons in the screening samples and (thanks to tracking) the latter expected to be signal-limited; radioassays and simulations indicate backgrounds from detector materials and radon daughters should be subdominant. We report on details of the background simulations and detector design that provide the discrimination, shielding, and radiopurity necessary to reach our sensitivity goals for a chamber with a 95 \u00d7 95 cm^2 sample area positioned below a 40 cm drift region and monitored by crisscrossed anode and cathode planes consisting of 151 wires each.", "doi": "10.1063/1.4818093", "isbn": "978-0-7354-1188-3", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2013-08-08", "pages": "132-135" }, { "id": "authors:g3yge-ay842", "collection": "authors", "collection_id": "g3yge-ay842", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160419-135527048", "type": "book_section", "title": "SuperCDMS status from Soudan and plans for SNOLab", "book_title": "Workshop on Dark Matter", "author": [ { "family_name": "Sander", "given_name": "J.", "clpid": "Sander-J" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Nelson", "given_name": "R.", "clpid": "Nelson-R" } ], "contributor": [ { "family_name": "Szczerbinska", "given_name": "B.", "clpid": "Szczerbinska-B" }, { "family_name": "Babu", "given_name": "K.", "clpid": "Babu-K" }, { "family_name": "Balantekin", "given_name": "B.", "clpid": "Balantekin-B" }, { "family_name": "Dutta", "given_name": "B.", "clpid": "Dutta-B" }, { "family_name": "Mohapatra", "given_name": "R.", "clpid": "Mohapatra-R" } ], "abstract": "Matter, as we know it, makes up less than 5% of the Universe. Various astrophysical observations have confirmed that one quarter of the Universe and most of the matter content in the Universe is made up of Dark Matter. The nature of Dark Matter is yet to be discovered and is one of the biggest questions in Physics. Particle Physics combined with astrophysical measurements of the abundance gives rise to a Dark Matter candidate called Weakly Interacting Massive Particle (WIMP). The low density of WIMPs in the galaxies and the extremely weak nature of the interaction with ordinary matter make detection of the WIMP an extraordinarily challenging task, with abundant fakes from various radioactive and cosmogenic backgrounds with much stronger electromagnetic interaction. The extremely weak nature of the WIMP interaction dictates detectors that have extremely low naturally occurring radioactive background, a large active volume (mass) of sensitive detector material to maximize statistics, a highly efficient detector based rejection mechanism for the dominant electromagnetic background and sophisticated analysis techniques to reject any residual background. This paper describes the status of the SuperCDMS experiment.", "doi": "10.1063/1.4807350", "isbn": "978-0-7354-1158-6", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2013-05-23", "pages": "129-135" }, { "id": "authors:xa7rk-27b60", "collection": "authors", "collection_id": "xa7rk-27b60", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130605-083925292", "type": "article", "title": "Sunyaev-Zel'dovich-measured Pressure Profiles from the Bolocam X-Ray/SZ Galaxy Cluster Sample", "author": [ { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Mantz", "given_name": "A.", "orcid": "0000-0002-8031-1217", "clpid": "Mantz-A-B" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Ameglio", "given_name": "S.", "clpid": "Ameglio-Silvia" }, { "family_name": "Downes", "given_name": "T. P.", "clpid": "Downes-T-P" }, { "family_name": "Koch", "given_name": "P. M.", "orcid": "0000-0003-2777-5861", "clpid": "Koch-P-M" }, { "family_name": "Lin", "given_name": "K.-Y.", "orcid": "0000-0002-8698-7277", "clpid": "Lin-Kai-Yang" }, { "family_name": "Maughan", "given_name": "B. J.", "clpid": "Maughan-B-J" }, { "family_name": "Molnar", "given_name": "S. M.", "orcid": "0000-0002-4227-956X", "clpid": "Molnar-S-M" }, { "family_name": "Moustakas", "given_name": "L.", "orcid": "0000-0003-3030-2360", "clpid": "Moustakas-L-A" }, { "family_name": "Mroczkowski", "given_name": "T.", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "Pierpaoli", "given_name": "E.", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Shitanishi", "given_name": "J. A.", "clpid": "Shitanishi-Jennifer-A" }, { "family_name": "Siegel", "given_name": "S. R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Umetsu", "given_name": "K.", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" }, { "family_name": "Van Der Pyl", "given_name": "N.", "clpid": "Van-Der-Pyl-N" } ], "abstract": "We describe Sunyaev-Zel'dovich (SZ) effect measurements and analysis of the intracluster medium (ICM) pressure profiles of a set of 45 massive galaxy clusters imaged using Bolocam at the Caltech Submillimeter Observatory. We deproject the average pressure profile of our sample into 13 logarithmically spaced radial bins between 0.07R_(500) and 3.5R_(500), and we find that a generalized Navarro, Frenk, and White (gNFW) profile describes our data with sufficient goodness-of-fit and best-fit parameters (C_(500), \u03b1, \u03b2, \u03b3, P_0 = 1.18, 0.86, 3.67, 0.67, 4.29). We use X-ray data to define cool-core and disturbed subsamples of clusters, and we constrain the average pressure profiles of each of these subsamples. We find that, given the precision of our data, the average pressure profiles of disturbed and cool-core clusters are consistent with one another at R\u2273 0.15R_(500), with cool-core systems showing indications of higher pressure at R\u227e 0.15R_(500). In addition, for the first time, we place simultaneous constraints on the mass scaling of cluster pressure profiles, their ensemble mean profile, and their radius-dependent intrinsic scatter between 0.1R_(500) and 2.0R_(500). The scatter among profiles is minimized at radii between \u2243 0.2R_(500) and \u2243 0.5R_(500), with a value of \u2243 20%. These results for the intrinsic scatter are largely consistent with previous analyses, most of which have relied heavily on X-ray derived pressures of clusters at significantly lower masses and redshifts compared to our sample. Therefore, our data provide further evidence that cluster pressure profiles are largely universal with scatter of \u2243 20%-40% about the universal profile over a wide range of masses and redshifts.", "doi": "10.1088/0004-637X/768/2/177", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2013-05-10", "series_number": "2", "volume": "768", "issue": "2", "pages": "Art. No. 177" }, { "id": "authors:7d97q-d7s75", "collection": "authors", "collection_id": "7d97q-d7s75", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130401-104913474", "type": "article", "title": "The Contribution of Radio Galaxy Contamination to Measurements of the Sunyaev-Zel'dovich Decrement in Massive Galaxy Clusters at 140 GHz with Bolocam", "author": [ { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Mroczkowski", "given_name": "T.", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Mantz", "given_name": "A.", "orcid": "0000-0002-8031-1217", "clpid": "Mantz-A-B" }, { "family_name": "Ameglio", "given_name": "S.", "clpid": "Ameglio-Silvia" }, { "family_name": "Downes", "given_name": "T. P.", "clpid": "Downes-T-P" }, { "family_name": "Koch", "given_name": "P. M.", "orcid": "0000-0003-2777-5861", "clpid": "Koch-P-M" }, { "family_name": "Lin", "given_name": "K.-Y.", "orcid": "0000-0002-8698-7277", "clpid": "Lin-Kai-Yang" }, { "family_name": "Molnar", "given_name": "S. M.", "orcid": "0000-0002-4227-956X", "clpid": "Molnar-S-M" }, { "family_name": "Moustakas", "given_name": "L.", "orcid": "0000-0003-3030-2360", "clpid": "Moustakas-L-A" }, { "family_name": "Muchovej", "given_name": "S. J. C.", "clpid": "Muchovej-Stephen-J-C" }, { "family_name": "Pierpaoli", "given_name": "E.", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Shitanishi", "given_name": "J. A.", "clpid": "Shitanishi-Jennifer-A" }, { "family_name": "Siegel", "given_name": "S. R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Umetsu", "given_name": "K.", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" } ], "abstract": "

We describe in detail our characterization of the compact radio source population in 140 GHz Bolocam observations of a set of 45 massive galaxy clusters. We use a combination of 1.4 and 30 GHz data to select a total of 28 probable cluster-member radio galaxies and also to predict their 140 GHz flux densities. All of these galaxies are steep-spectrum radio sources and they are found preferentially in the cool-core clusters within our sample. In particular, 11 of the 12 brightest cluster-member radio sources are associated with cool-core systems. Although none of the individual galaxies are robustly detected in the Bolocam data, the ensemble-average flux density at 140 GHz is consistent with, but slightly lower than, the extrapolation from lower frequencies assuming a constant spectral index. In addition, our data indicate an intrinsic scatter of \u2243 30% around the power-law extrapolated flux densities at 140 GHz, although our data do not tightly constrain this scatter. For our cluster sample, which is composed of high-mass and moderate-redshift systems, we find that the maximum fractional change in the Sunyaev–Zel'dovich signal integrated over any single cluster due to the presence of these radio sources is \u2243 20%, and only \u2243 1/4 of the clusters show a fractional change of more than 1%. The amount of contamination is strongly dependent on cluster morphology, and nearly all of the clusters with \u2a7e1% contamination are cool-core systems. This result indicates that radio contamination is not significant compared with current noise levels in 140 GHz images of massive clusters and is in good agreement with the level of radio contamination found in previous results based on lower frequency data or simulations.

", "doi": "10.1088/0004-637X/764/2/152", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2013-02-20", "series_number": "2", "volume": "764", "issue": "2", "pages": "Art. No. 152" }, { "id": "authors:eesqf-24v95", "collection": "authors", "collection_id": "eesqf-24v95", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130109-075048169", "type": "article", "title": "A Multi-wavelength Study of the Sunyaev-Zel'dovich Effect in the Triple-merger Cluster MACS J0717.5+3745 with MUSTANG and Bolocam", "author": [ { "family_name": "Mroczkowski", "given_name": "Tony", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-Anthony-K" }, { "family_name": "Dicker", "given_name": "Simon", "orcid": "0000-0002-1940-4289", "clpid": "Dicker-Simon-R" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Reese", "given_name": "Erik D.", "orcid": "0000-0002-8700-7082", "clpid": "Reese-Erik-D" }, { "family_name": "Mason", "given_name": "Brian", "clpid": "Mason-Brian-S" }, { "family_name": "Czakon", "given_name": "Nicole", "clpid": "Czakon-Nicole-G" }, { "family_name": "Romero", "given_name": "Charles", "clpid": "Romero-Charles-E" }, { "family_name": "Young", "given_name": "Alexander", "orcid": "0000-0003-2291-6952", "clpid": "Young-A-H" }, { "family_name": "Devlin", "given_name": "Mark", "orcid": "0000-0002-3169-9761", "clpid": "Devlin-Mark-J" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Korngut", "given_name": "Phillip", "clpid": "Korngut-Phillip-M" }, { "family_name": "Sarazin", "given_name": "Craig", "clpid": "Sarazin-Craig" }, { "family_name": "Bock", "given_name": "James", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Koch", "given_name": "Patrick M.", "orcid": "0000-0003-2777-5861", "clpid": "Koch-Patrick-M" }, { "family_name": "Lin", "given_name": "Kai-Yang", "orcid": "0000-0002-8698-7277", "clpid": "Lin-Kai-Yang" }, { "family_name": "Molnar", "given_name": "Sandor M.", "orcid": "0000-0002-4227-956X", "clpid": "Molnar-Sandor-M" }, { "family_name": "Pierpaoli", "given_name": "Elena", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Umetsu", "given_name": "Keiichi", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" }, { "family_name": "Zemcov", "given_name": "Michael", "orcid": "0000-0001-8253-1451", "clpid": "Zemcov-Michael" } ], "abstract": "We present 90, 140, and 268 GHz subarcminute resolution imaging of the Sunyaev-Zel'dovich effect (SZE) in the disturbed, intermediate-redshift (z = 0.5458) galaxy cluster MACS J0717.5+3745, a triple-merger system comprising four distinct, optically detected subclusters. Our 90 GHz SZE data result in a sensitive, 34 \u03bcJy beam^(\u20131) map of the SZE at 13\" effective resolution using the MUSTANG bolometer array on the Green Bank Telescope (GBT). Our 140 and 268 GHz SZE imaging, with resolutions of 58\" and 31\" and sensitivities of 1.8 and 3.3 mJy beam^(\u20131), respectively, was obtained through observations from the Caltech Submillimeter Observatory using Bolocam. We compare these maps to a two-dimensional pressure map derived from Chandra X-ray observations. Our MUSTANG SZE data confirm previous indications from Chandra of a pressure enhancement due to shock-heated, \u2273 20 keV gas immediately adjacent to extended radio emission seen in low-frequency radio maps of this cluster. MUSTANG also detects pressure substructure that is not well constrained by the Chandra X-ray data in the remnant core of a merging subcluster. We find that the small-scale pressure enhancements in the MUSTANG data amount to ~2% of the total pressure measured in the 140 GHz Bolocam observations. The X-ray inferred pseudo-pressure template also fails on larger scales to accurately describe the Bolocam data, particularly at the location of the subcluster with a remnant core known to have a high line-of-sight optical velocity of ~3200 km s^(\u20131). Our Bolocam data are adequately described when we add an additional component\u2014not described by a thermal SZE spectrum\u2014to the X-ray template coincident with this subcluster. Using flux densities extracted from our model fits, and marginalizing over the X-ray spectroscopic temperature constraints for the region, we fit a thermal + kinetic SZE spectrum to our Bolocam data and find that the subcluster has a best-fit line-of-sight proper velocity vz = 3600^(+3440)_(\u20132160) km s^(\u20131), in agreement with the optical velocity estimates for the subcluster. The probability v_z \u2264 0 given our measurements is 2.1%. Repeating this analysis using flux densities measured directly from our maps results in a 3.4% probability v_z \u2264 0. We note that this tantalizing result for the kinetic SZE is on resolved, subcluster scales.", "doi": "10.1088/0004-637X/761/1/47", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2012-12-10", "series_number": "1", "volume": "761", "issue": "1", "pages": "Art. No. 47" }, { "id": "authors:7cntt-srt76", "collection": "authors", "collection_id": "7cntt-srt76", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130215-113036942", "type": "book_section", "title": "Status of MUSIC, the MUltiwavelength Sub/millimeter Inductance Camera", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI", "author": [ { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Bockstiegel", "given_name": "Clint", "clpid": "Bockstiegel-C" }, { "family_name": "Brugger", "given_name": "Spencer", "clpid": "Brugger-S" }, { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Downes", "given_name": "Thomas P.", "clpid": "Downes-T-P" }, { "family_name": "Duan", "given_name": "Ran", "clpid": "Duan-Ran" }, { "family_name": "Gao", "given_name": "Jiansong", "clpid": "Gao-Jiansong" }, { "family_name": "Gill", "given_name": "Amandeep K.", "clpid": "Gill-A-K" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Hollister", "given_name": "Matthew I.", "clpid": "Hollister-M-I" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-H-G" }, { "family_name": "Maloney", "given_name": "Philip R.", "clpid": "Maloney-P-R" }, { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "McHugh", "given_name": "Sean G.", "clpid": "McHugh-S-G" }, { "family_name": "Miller", "given_name": "David", "clpid": "Miller-D" }, { "family_name": "Noroozian", "given_name": "Omid", "clpid": "Noroozian-O" }, { "family_name": "Nguyen", "given_name": "Hien T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Schlaerth", "given_name": "James A.", "clpid": "Schlaerth-J-A" }, { "family_name": "Siegel", "given_name": "Seth", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Vayonakis", "given_name": "Anastasios K.", "clpid": "Vayonakis-A-K" }, { "family_name": "Wilson", "given_name": "Philip R.", "clpid": "Wilson-P-R" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "We present the status of MUSIC, the MUltiwavelength Sub/millimeter Inductance Camera, a new instrument for the Caltech Submillimeter Observatory. MUSIC is designed to have a 14', diffraction-limited field-of-view instrumented with 2304 detectors in 576 spatial pixels and four spectral bands at 0.87, 1.04, 1.33, and 1.98 mm. MUSIC will be used to study dusty star-forming galaxies, galaxy clusters via the Sunyaev-Zeldovich effect, and star formation in our own and nearby galaxies. MUSIC uses broadband superconducting phased-array slot-dipole antennas to form beams, lumpedelement on-chip bandpass filters to define spectral bands, and microwave kinetic inductance detectors to sense incoming light. The focal plane is fabricated in 8 tiles consisting of 72 spatial pixels each. It is coupled to the telescope via an ambient-temperature ellipsoidal mirror and a cold reimaging lens. A cold Lyot stop sits at the image of the primary mirror formed by the ellipsoidal mirror. Dielectric and metal-mesh filters are used to block thermal infrared and out-ofband radiation. The instrument uses a pulse tube cooler and ^(3)He/^(3)He/^(4)He closed-cycle cooler to cool the focal plane to below 250 mK. A multilayer shield attenuates Earth's magnetic field. Each focal plane tile is read out by a single pair of coaxes and a HEMT amplifier. The readout system consists of 16 copies of custom-designed ADC/DAC and IF boards coupled to the CASPER ROACH platform. We focus on recent updates on the instrument design and results from the commissioning of the full camera in 2012.", "doi": "10.1117/12.926055", "isbn": "978-0-8194-9153-4", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2012-09-27", "pages": "Art. No. 845205" }, { "id": "authors:b2bx3-qw248", "collection": "authors", "collection_id": "b2bx3-qw248", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161026-135147388", "type": "book_section", "title": "BICEP2 and Keck Array operational overview and status of observations", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI", "author": [ { "family_name": "Ogburn", "given_name": "R. W., IV", "clpid": "Ogburn-R-W-IV" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Hui", "given_name": "H.", "clpid": "Hui-Howard" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "The Bicep2 and Keck Array experiments are designed to measure the polarization of the cosmic microwave background (CMB) on angular scales of 2-4 degrees (\u2113 = 50\u2013100). This is the region in which the B-mode signal, a signature prediction of cosmic inflation, is expected to peak. Bicep2 was deployed to the South Pole at the end of 2009 and is in the middle of its third year of observing with 500 polarization-sensitive detectors at 150 GHz. The Keck Array was deployed to the South Pole at the end of 2010, initially with three receivers\u2014each similar to Bicep2. An additional two receivers have been added during the 2011-12 summer. We give an overview of the two experiments, report on substantial gains in the sensitivity of the two experiments after post-deployment optimization, and show preliminary maps of CMB polarization from Bicep2.", "doi": "10.1117/12.925731", "isbn": "978-0-8194-9153-4", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2012-09-27", "pages": "Art. No. 84521A" }, { "id": "authors:rq1cm-60839", "collection": "authors", "collection_id": "rq1cm-60839", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130211-115743532", "type": "book_section", "title": "Antenna-coupled TES bolometers for the Keck Array, Spider, and Polar-1", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI", "author": [ { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hui", "given_name": "H.", "clpid": "Hui-Howard" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Moncelsi", "given_name": "L.", "orcid": "0000-0002-4242-3015", "clpid": "Moncelsi-Lorenzo" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Ogburn", "given_name": "R. W., IV", "clpid": "Ogburn-R-W-IV" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Staniszewski", "given_name": "Z.", "clpid": "Staniszewski-Z" }, { "family_name": "Teply", "given_name": "G.", "clpid": "Teply-G-P" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "Between the BICEP2 and Keck Array experiments, we have deployed over 1500 dual polarized antenna coupled bolometers to map the Cosmic Microwave Background's polarization. We have been able to rapidly deploy these detectors because they are completely planar with an integrated phased-array antenna. Through our experience in these experiments, we have learned of several challenges with this technology- specifically the beam synthesis in the antenna- and in this paper we report on how we have modified our designs to mitigate these challenges. In particular, we discus differential steering errors between the polarization pairs' beam centroids due to microstrip cross talk and gradients of penetration depth in the niobium thin films of our millimeter wave circuits. We also discuss how we have suppressed side lobe response with a Gaussian taper of our antenna illumination pattern. These improvements will be used in Spider, Polar-1, and this season's retrofit of Keck Array.", "doi": "10.1117/12.927214", "isbn": "978-0-8194-9153-4", "publisher": "Society of Photo-optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2012-09-27", "pages": "Art. No. 84521G" }, { "id": "authors:z92tk-zt169", "collection": "authors", "collection_id": "z92tk-zt169", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161025-122633225", "type": "book_section", "title": "Optimization and sensitivity of the Keck Array", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI", "author": [ { "family_name": "Kernasovskiy", "given_name": "S.", "clpid": "Kernasovskiy-S-A" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Staniszewski", "given_name": "Z.", "clpid": "Staniszewski-Z" }, { "family_name": "Teply", "given_name": "G.", "clpid": "Teply-G-P" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "J.", "clpid": "Zmuidzinas-J" } ], "abstract": "The Keck Array (SPUD) began observing the cosmic microwave background's polarization in the winter of 2011 at the South Pole. The Keck Array follows the success of the predecessor experiments BICEP and BICEP2, 1 using five on-axis refracting telescopes. These have a combined imaging array of 2500 antenna-coupled TES bolometers read with a SQUID- based time domain multiplexing system. We will discuss the detector noise and the optimization of the readout. The achieved sensitivity of the Keck Array is 11.5 \u00b5K_(CMB)\u221as in the 2012 configuration.", "doi": "10.1117/12.926934", "isbn": "978-0-8194-9153-4", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2012-09-27", "pages": "Art. No. 84521B" }, { "id": "authors:drfdt-t7p87", "collection": "authors", "collection_id": "drfdt-t7p87", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130301-133404016", "type": "book_section", "title": "High-resolution gamma-ray detection using phonon-mediated detectors", "book_title": "High Energy, Optical, and Infrared Detectors for Astronomy V", "author": [ { "family_name": "Cornell", "given_name": "B. D.", "clpid": "Cornell-B-D" }, { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-B" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-P-K" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Holland", "given_name": "Andrew D.", "clpid": "Holland-A-D" }, { "family_name": "Beletic", "given_name": "James W.", "clpid": "Beletic-J-W" } ], "abstract": "We are presenting the results of our ongoing efforts to develop a new type of focal plane detector for the 10 to 100 keV band with an energy resolution of 0.1 %. The device will measure energy and position by using microwave kinetic inductance detectors (MKIDs) to sense athermal phonons created by photon absorption in a dielectric substrate. We have fabricated a proof-of-concept detector of size 2 cm \u00d7 2 cm \u00d7 1 mm on silicon, which has demonstrated a baseline energy resolution of = 0.38 keV and = 0.55 keV at 30 keV.", "doi": "10.1117/12.926829", "isbn": "978-0-8194-9154-1", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellinham, WA", "publication_date": "2012-09-25", "pages": "Art. No. 84532N" }, { "id": "authors:p12qr-r3c26", "collection": "authors", "collection_id": "p12qr-r3c26", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161025-153533537", "type": "book_section", "title": "Optical Characterization of the Keck Array Polarimeter at the South Pole", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI", "author": [ { "family_name": "Vieregg", "given_name": "A. G.", "clpid": "Vieregg-A-G" }, { "family_name": "Aikin", "given_name": "R.", "clpid": "Aikin-R" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Runyan", "given_name": "M.", "clpid": "Runyan-M" }, { "family_name": "Staniszewski", "given_name": "Z.", "clpid": "Staniszewski-Z" }, { "family_name": "Teply", "given_name": "G.", "clpid": "Teply-G-P" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "J.", "clpid": "Zmuidzinas-J" } ], "abstract": "The Keck Array (SPUD) is a set of microwave polarimeters that observes from the South Pole at degree angular scales in search of a signature of Inflation imprinted as B-mode polarization in the Cosmic Microwave Background (CMB). The first three Keck Array receivers were deployed during the 2010-2011 Austral summer, followed by two new receivers in the 2011-2012 summer season, completing the full five-receiver array. All five receivers are currently observing at 150 GHz. The Keck Array employs the field-proven BICEP/ BICEP2 strategy of using small, cold, on-axis refractive optics, providing excellent control of systematics while maintaining a large field of view. This design allows for full characterization of far-field optical performance using microwave sources on the ground. We describe our efforts to characterize the main beam shape and beam shape mismatch between co-located orthogonally-polarized detector pairs, and discuss the implications of measured differential beam parameters on temperature to polarization leakage in CMB analysis.", "doi": "10.1117/12.926639", "isbn": "978-0-8194-9153-4", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2012-09-24", "pages": "Art. No. 845226" }, { "id": "authors:es1v3-mwd45", "collection": "authors", "collection_id": "es1v3-mwd45", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20121109-140625053", "type": "article", "title": "X-ray, lensing and Sunyaev\u2013Zel'dovich triaxial analysis of Abell 1835 out to R\u2082\u2080\u2080", "author": [ { "family_name": "Morandi", "given_name": "Andrea", "clpid": "Morandi-Andrea" }, { "family_name": "Limousin", "given_name": "Marceau", "clpid": "Limousin-Marceau" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Pierpaoli", "given_name": "Elena", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Jullo", "given_name": "Eric", "orcid": "0000-0002-9253-053X", "clpid": "Jullo-Eric" }, { "family_name": "Richard", "given_name": "Johan", "orcid": "0000-0001-5492-1049", "clpid": "Richard-Johan" }, { "family_name": "Ameglio", "given_name": "Silvia", "clpid": "Ameglio-Silvia" } ], "abstract": "

The measurement of the intrinsic shape and orientation of dark matter (DM) and intracluster (IC) gas in galaxy clusters is crucial for constraining their formation and evolution, and for enhancing the use of clusters as more precise cosmological probes. Extending our previous works, for the first time we present the results from a triaxial joint analysis of the galaxy cluster Abell 1835, using X-ray, strong lensing (SL) and Sunyaev–Zel'dovich (SZ) data. We parametrically reconstruct the full three-dimensional structure (triaxial shape and principal axis orientation) of both the DM and the IC gas, and the level of non-thermal pressure of the IC gas. We find that the intermediate–major and minor–major axial ratios of the DM are 0.71 ± 0.08 and 0.59 ± 0.05, respectively, and that the major axis of the DM halo is inclined with respect to the line of sight at 18.3 ± 5.2 deg. We present the first observational measurement of the non-thermal pressure out to R200. This has been evaluated to be a few per cent of the total energy budget in the internal regions, while it reaches approximately 20 per cent in the outer volumes. We discuss the implications of our method for the viability of the cold dark matter (CDM) scenario, focusing on the concentration parameter C and the inner slope of the DM γ in order to test the CDM paradigm for structure formation. We measure γ = 1.01 ± 0.06 and C = 4.32 ± 0.44; these values are close to the predictions of the CDM model. The combination of X-ray/SL data at high spatial resolution, which are capable of resolving the cluster core, with the SZ data, which are more sensitive to the cluster outer volume, allows us to characterize the level and the gradient of the gas entropy distribution and non-thermal pressure out to R200. Thus, we break the degeneracy among the physical models describing the thermal history of the intracluster medium.

", "doi": "10.1111/j.1365-2966.2012.21196.x", "issn": "0035-8711", "publisher": "Royal Astronomical Society", "publication": "Monthly Notices of the Royal Astronomical Society", "publication_date": "2012-09-21", "series_number": "3", "volume": "425", "issue": "3", "pages": "2069-2082" }, { "id": "authors:x2r9n-cj338", "collection": "authors", "collection_id": "x2r9n-cj338", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120905-071749696", "type": "article", "title": "CLASH: Mass Distribution in and around MACS J1206.2-0847 from a Full Cluster Lensing Analysis", "author": [ { "family_name": "Umetsu", "given_name": "Keiichi", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" }, { "family_name": "Czakon", "given_name": "Nicole", "clpid": "Czakon-N-G" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Mroczkowski", "given_name": "Tony", "orcid": "0000-0003-3816-5372", "clpid": "Mroczkowski-T-K" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "We derive an accurate mass distribution of the galaxy cluster MACS J1206.2-0847 (z = 0.439) from a combined weak-lensing distortion, magnification, and strong-lensing analysis of wide-field Subaru BVR_c I_cz' imaging and our recent 16-band Hubble Space Telescope observations taken as part of the Cluster Lensing And Supernova survey with Hubble program. We find good agreement in the regions of overlap between several weak- and strong-lensing mass reconstructions using a wide variety of modeling methods, ensuring consistency. The Subaru data reveal the presence of a surrounding large-scale structure with the major axis running approximately northwest-southeast (NW-SE), aligned with the cluster and its brightest galaxy shapes, showing elongation with a ~2:1 axis ratio in the plane of the sky. Our full-lensing mass profile exhibits a shallow profile slope dln \u03a3/dln R ~ \u20131 at cluster outskirts (R \u2273 1 Mpc h ^(\u20131)), whereas the mass distribution excluding the NW-SE excess regions steepens farther out, well described by the Navarro-Frenk-White form. Assuming a spherical halo, we obtain a virial mass M_(vir) = (1.1 \u00b1 0.2 \u00b1 0.1) \u00d7 10^(15) M_\u2609 h^(\u20131) and a halo concentration c_(vir) = 6.9 \u00b1 1.0 \u00b1 1.2 (c_(vir) ~ 5.7 when the central 50 kpc h^(\u20131) is excluded), which falls in the range 4 \u227e (c)\u227e 7 of average c(M, z) predictions for relaxed clusters from recent \u039b cold dark matter simulations. Our full-lensing results are found to be in agreement with X-ray mass measurements where the data overlap, and when combined with Chandra gas mass measurements, they yield a cumulative gas mass fraction of 13.7^(+4.5)_(\u20133.0%) at 0.7 Mpc h^(\u20131)(\u22481.7 r_(2500)), a typical value observed for high-mass clusters.", "doi": "10.1088/0004-637X/755/1/56", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2012-08-10", "series_number": "1", "volume": "755", "issue": "1", "pages": "Art. No. 56" }, { "id": "authors:tsagy-ewa28", "collection": "authors", "collection_id": "tsagy-ewa28", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120913-130541657", "type": "article", "title": "Review of Particle Physics", "author": [ { "family_name": "Beringer", "given_name": "J.", "clpid": "Beringer-J" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Vogel", "given_name": "P.", "orcid": "0000-0003-0587-5466", "clpid": "Vogel-P" }, { "family_name": "Zhu", "given_name": "R.-Y.", "orcid": "0000-0003-3091-7461", "clpid": "Zhu-Ren-Yuan" }, { "literal": "Particle Data Group" } ], "abstract": "This biennial Review summarizes much of particle physics. Using data from previous editions, plus 2658 new measurements from 644 papers, we list, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as Higgs bosons, heavy neutrinos, and supersymmetric particles. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as the Standard Model, particle detectors, probability, and statistics. Among the 112 reviews are many that are new or heavily revised including those on Heavy-Quark and Soft-Collinear Effective Theory, Neutrino Cross Section Measurements, Monte Carlo Event Generators, Lattice QCD, Heavy Quarkonium Spectroscopy, Top Quark, Dark Matter, V_(cb) & V_(ub), Quantum Chromodynamics, High-Energy Collider Parameters, Astrophysical Constants, Cosmological Parameters, and Dark Matter.\nA booklet is available containing the Summary Tables and abbreviated versions of some of the other sections of this full Review. All tables, listings, and reviews (and errata) are also available on the Particle Data Group website: http://pdg.lbl.gov/.", "doi": "10.1103/PhysRevD.86.010001", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2012-07-20", "series_number": "1", "volume": "86", "issue": "1", "pages": "Art. No. 010001" }, { "id": "authors:58fck-v0n08", "collection": "authors", "collection_id": "58fck-v0n08", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120409-083629600", "type": "article", "title": "Position and energy-resolved particle detection using phonon-mediated microwave kinetic inductance detectors", "author": [ { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-B" }, { "family_name": "Cornell", "given_name": "B.D.", "clpid": "Cornell-B-D" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-P-K" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "We demonstrate position and energy-resolved phonon-mediated detection of particle interactions in a silicon substrate instrumented with an array of microwave kinetic inductance detectors (MKIDs). The relative magnitude and delay of the signal received in each sensor allow the location of the interaction to be determined with \u2272\u20091mm resolution at 30\u2009keV. Using this position information, variations in the detector response with position can be removed, and an energy resolution of \u03c3_E\u2009=\u20090.55\u2009keV at 30\u2009keV was measured. Since MKIDs can be fabricated from a single deposited film and are naturally multiplexed in the frequency domain, this technology can be extended to provide highly pixelized athermal phonon sensors for \u223c1\u2009kg scale detector elements. Such high-resolution, massive particle detectors would be applicable to rare-event searches such as the direct detection of dark matter, neutrinoless double-beta decay, or coherent neutrino-nucleus scattering.", "doi": "10.1063/1.4726279", "issn": "0003-6951", "publisher": "American Institute of Physics", "publication": "Applied Physics Letters", "publication_date": "2012-06-04", "series_number": "23", "volume": "100", "issue": "23", "pages": "Art. No. 232601" }, { "id": "authors:10c8x-xqv70", "collection": "authors", "collection_id": "10c8x-xqv70", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120605-123408895", "type": "article", "title": "The Keck Array: A Multi Camera CMB Polarimeter at the South Pole", "author": [ { "family_name": "Staniszewski", "given_name": "Z.", "clpid": "Staniszewski-Z" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Teply", "given_name": "G.", "clpid": "Teply-G-P" } ], "abstract": "The Keck array is a new multi-camera Cosmic Microwave Background (CMB) polarimeter. Each camera contains 256 polarization pairs of antenna-coupled transition edge sensor (TES) bolometers. We recently deployed three of five cameras at the geographic South Pole, and plan to deploy the final two cameras in early 2012. This new telescope is an ideal instrument to search for the primordial B-mode polarization signal imprinted in the CMB by inflationary gravitational waves. We will discuss the design of the detectors and receivers, the status of current observations,\nand report on progress toward upgrading the instrument with the full compliment of polarized receivers.", "doi": "10.1007/s10909-012-0510-1", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2012-06", "series_number": "5-6", "volume": "167", "issue": "5-6", "pages": "827-833" }, { "id": "authors:q0ynx-db615", "collection": "authors", "collection_id": "q0ynx-db615", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120501-154700954", "type": "article", "title": "The Status of Music: A Multicolor Sub/millimeter MKID Instrument", "author": [ { "family_name": "Schlaerth", "given_name": "J. A.", "clpid": "Schlaerth-J-A" }, { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-P-K" }, { "family_name": "Downes", "given_name": "T. P.", "clpid": "Downes-T-P" }, { "family_name": "Duan", "given_name": "R.", "clpid": "Duan-R" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "M. I.", "clpid": "Hollister-M-I" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Maloney", "given_name": "P. R.", "clpid": "Maloney-P-R" }, { "family_name": "Mazin", "given_name": "B. A.", "clpid": "Mazin-B-A" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Noroozian", "given_name": "O.", "clpid": "Noroozian-O" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Siegel", "given_name": "S. R.", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "We report on the recent progress of the Multicolor Submillimeter (kinetic) Inductance Camera, or MUSIC. MUSIC will use antenna-coupled Microwave Kinetic Inductance Detectors to observe in four colors (150 GHz, 230 GHz, 290 GHz and 350 GHz) with 2304 detectors, 576 per band, at the Caltech Submillimeter Observatory. It will deploy in 2012. Here we provide an overview of the instrument, focusing on the array design. We have also used a pathfinder demonstration instrument, DemoCam, to identify problems in advance of the deployment of MUSIC. In particular, we identified two major limiters of our sensitivity: out-of-band light directly coupling to the detectors (i.e. not through the antenna), effectively an excess load, and a large 1/f contribution from our amplifiers and electronics. We discuss the steps taken to mitigate these effects to reach background-limited performance (BLIP) in observation.", "doi": "10.1007/s10909-012-0541-7", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2012-05", "series_number": "3-4", "volume": "167", "issue": "3-4", "pages": "347-353" }, { "id": "authors:fh0r1-1qa12", "collection": "authors", "collection_id": "fh0r1-1qa12", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200723-174404438", "type": "article", "title": "Phonon mediated microwave kinetic inductance detectors", "author": [ { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-B" }, { "family_name": "Cornell", "given_name": "B.", "clpid": "Cornell-B" }, { "family_name": "Mazin", "given_name": "B. A.", "clpid": "Mazin-B-A" }, { "family_name": "Gao", "given_name": "J.", "clpid": "Gao-J" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-P-K" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "We are developing athermal-phonon mediated particle detectors using microwave kinetic inductance detectors (MKIDs) as the phonon sensing elements. Since MKIDs are easily multiplexed, hundreds of sensors patterned on a single dielectric substrate can be read out simultaneously, leading to a precise, time-resolved measurement of the phonon flux at each point on the detector surface. In addition to providing a high-resolution measurement of the location of the interaction, the energy deposited by the particle can be reconstructed with an expected baseline resolution of tens of eV. The complexity of the cryogenic readout electronics is significantly reduced relative to designs based on multiplexed transition edge sensors (TES). Initial proof-of-principle devices demonstrate energy resolutions as good as 0.7 keV at 30 keV, dominated by the position dependence of the phonon signal. New designs are aimed at improving this resolution by more than an order of magnitude. Such high-resolution phonon mediated detectors would have applications including direct detection of dark matter, hard X-ray/soft gamma-ray astrophysics, neutrinoless double beta decay, and coherent neutrino-nucleus scattering.", "doi": "10.1007/s10909-011-0434-1", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2012-05", "series_number": "3-4", "volume": "167", "issue": "3-4", "pages": "329-334" }, { "id": "authors:c7bwd-9h079", "collection": "authors", "collection_id": "c7bwd-9h079", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120501-100739165", "type": "article", "title": "Characterization and Fabrication of the TES Arrays for the Spider, Keck and BICEP2 CMB Polarimeters", "author": [ { "family_name": "Bonetti", "given_name": "J. A.", "clpid": "Bonetti-J-A" }, { "family_name": "Turner", "given_name": "A. D.", "clpid": "Turner-A-D" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-Peter-K" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Holmes", "given_name": "W.", "clpid": "Holmes-W-A" }, { "family_name": "Jones", "given_name": "W. C.", "clpid": "Jones-W-C" }, { "family_name": "Kenyon", "given_name": "M.", "clpid": "Kenyon-M" }, { "family_name": "Kovac", "given_name": "J. M.", "clpid": "Kovac-J-M" }, { "family_name": "Kuo", "given_name": "C. L.", "clpid": "Kuo-Chia-Lam" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "O'Brient", "given_name": "R.", "clpid": "O'Brient-R-C" }, { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Runyan", "given_name": "M.", "clpid": "Runyan-M-C" }, { "family_name": "Staniszewski", "given_name": "Z.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Sudiwala", "given_name": "R.", "clpid": "Sudiwala-R-V" }, { "family_name": "Transgrud", "given_name": "A.", "clpid": "Transgrud-Amy-R" } ], "abstract": "Spider, the Keck Array, and BICEP2 are projects to study the polarization of the cosmic microwave background (CMB). All three use large format arrays of antenna-coupled, membrane-isolated, transition edge sensors (TES's). Although similar, each project requires its own set of device parameters, such as thermal conductance, time constants, and normal state resistances. We have perfected a fabrication process that achieves two primary objectives: (1) high device yields of 95% or greater, and (2) very low spreads in devices parameters. Currently our arrays are taking science data at the South Pole in both the BICEP2 and Keck array telescopes. The focal planes for Spider, a high altitude balloon mission, are on schedule for a 2012 deployment. An overview of fabrication and development is given as well as a snapshot of scientific data.", "doi": "10.1007/s10909-012-0529-3", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2012-05", "series_number": "3-4", "volume": "167", "issue": "3-4", "pages": "146-151" }, { "id": "authors:d9wkw-zvg05", "collection": "authors", "collection_id": "d9wkw-zvg05", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120516-092304643", "type": "article", "title": "High Spectral Resolution Measurement of the Sunyaev\u2013Zel'dovich Effect Null with Z-Spec", "author": [ { "family_name": "Zemcov", "given_name": "M.", "orcid": "0000-0001-8253-1451", "clpid": "Zemcov-M" }, { "family_name": "Aguirre", "given_name": "J.", "clpid": "Aguirre-J" }, { "family_name": "Bock", "given_name": "J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Bradford", "given_name": "C. M.", "orcid": "0000-0001-5261-7094", "clpid": "Bradford-C-M" }, { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Lupu", "given_name": "R.", "clpid": "Lupu-R" }, { "family_name": "Maloney", "given_name": "P.", "clpid": "Maloney-P" }, { "family_name": "Mauskopf", "given_name": "P.", "clpid": "Mauskopf-P" }, { "family_name": "Million", "given_name": "E.", "clpid": "Million-E-T" }, { "family_name": "Murphy", "given_name": "E. J.", "orcid": "0000-0001-7089-7325", "clpid": "Murphy-E-J" }, { "family_name": "Naylor", "given_name": "B.", "clpid": "Naylor-B" }, { "family_name": "Nguyen", "given_name": "H.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Rosenman", "given_name": "M.", "clpid": "Rosenman-M" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Scott", "given_name": "K. S.", "clpid": "Scott-K-S" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "The Sunyaev-Zel'dovich (SZ) effect spectrum crosses through a null where \u0394T_CMB = 0 near \u03bd_0 = 217 GHz. In a cluster of galaxies, \u03bd0 can be shifted from the canonical thermal SZ effect value by corrections to the SZ effect scattering due to the properties of the inter-cluster medium. We have measured the SZ effect in the hot galaxy cluster RX J 1347.5 \u2013 1145 with Z-Spec, an R ~ 300 grating spectrometer sensitive between 185 and 305 GHz. These data comprise a high spectral resolution measurement around the null of the SZ effect and clearly exhibit the transition from negative to positive \u0394T_CMB over the Z-Spec band. The SZ null position is measured to be \u03bd_0 = 225.8 \u00b1 2.5(stat.) \u00b1 1.2(sys.) GHz, which differs from the canonical null frequency by 3.0\u03c3 and is evidence for modifications to the canonical thermal SZ effect shape. Assuming the measured shift in \u03bd0 is due only to relativistic corrections to the SZ spectrum, we place the limit kT_e = 17.1 \u00b1 5.3 keV from the zero-point measurement alone. By simulating the response of the instrument to the sky, we are able to generate likelihood functions in {y_0, T_e, v_pec} space. For v_pec = 0 km s^(\u20131), we measure the best-fitting SZ model to be y_0 = 4.6^(+0.6)_(\u20130.9) \u00d7 10^(\u20134), T_e, 0 = 15.2^(+12)_(\u20137.4) keV. When v pec is allowed to vary, a most probable value of v_pec = + 450 \u00b1 810 km s^(\u20131) is found.", "doi": "10.1088/0004-637X/749/2/114", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2012-04-20", "series_number": "2", "volume": "749", "issue": "2", "pages": "114" }, { "id": "authors:51x8j-xww98", "collection": "authors", "collection_id": "51x8j-xww98", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120501-152714195", "type": "article", "title": "Bolocam Observations of Two Unconfirmed Galaxy Cluster Candidates from the Planck Early Sunyaev-Zel'dovich Sample", "author": [ { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Bridge", "given_name": "C.", "clpid": "Bridge-C" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Koch", "given_name": "P. M.", "orcid": "0000-0003-2777-5861", "clpid": "Koch-P-M" }, { "family_name": "Lin", "given_name": "K.-Y.", "orcid": "0000-0002-8698-7277", "clpid": "Lin-Kai-Yang" }, { "family_name": "Molnar", "given_name": "S. M.", "orcid": "0000-0002-4227-956X", "clpid": "Molnar-S-M" }, { "family_name": "Umetsu", "given_name": "K.", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" } ], "abstract": "We present Bolocam observations of two galaxy cluster candidates reported as unconfirmed in the Planck early Sunyaev-Zel'dovich (eSZ) sample, PLCKESZ G115.71+17.52 and PLCKESZ G189.84\u201337.24. We observed each of these candidates with Bolocam at 140 GHz from the Caltech Submillimeter Observatory in 2011 October. The resulting images have white noise levels of \u224330 \u03bcKCMB arcmin in their central regions. We find a significant SZ decrement toward PLCKESZ G115.71. This decrement has a false detection probability of 5.3 \u00d7 10^(\u20135), and we therefore confirm PLCKESZ G115.71 as a cluster. The maximum SZ decrement toward PLCKESZ G189.84 corresponds to a false detection probability of 0.027, and it therefore remains as an unconfirmed cluster candidate. In order to make our SZ-derived results more robust, we have also analyzed data from the Wide-field Infrared Survey Explorer (WISE) at the location of each cluster candidate. We find an overdensity of WISE sources consistent with other clusters in the eSZ at the location of PLCKESZ G115.71, providing further evidence that it is a cluster. We do not find a significant overdensity of WISE sources at the location of PLCKESZ G189.84.", "doi": "10.1088/2041-8205/749/1/L15", "issn": "2041-8205", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal Letters", "publication_date": "2012-04-10", "series_number": "1", "volume": "749", "issue": "1", "pages": "Art. No. L15" }, { "id": "authors:1n46b-6a898", "collection": "authors", "collection_id": "1n46b-6a898", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120515-072010829", "type": "article", "title": "A high signal-to-noise ratio map of the Sunyaev\u2013Zel'dovich increment at 1.1-mm wavelength in Abell 1835", "author": [ { "family_name": "Mauskopf", "given_name": "P. D.", "orcid": "0000-0001-6397-5516", "clpid": "Mauskopf-P-D" }, { "family_name": "Horner", "given_name": "P. F.", "clpid": "Hroner-P-F" }, { "family_name": "Aguirre", "given_name": "J.", "clpid": "Aguirre-J" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Egami", "given_name": "E.", "clpid": "Egami-Eichi" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Laurent", "given_name": "G.", "clpid": "Laurent-G-T" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" } ], "abstract": "We present an analysis of an 8-arcmin diameter map of the area around the galaxy cluster Abell 1835 from jiggle-map observations at a wavelength of 1.1 mm using the Bolometric Camera (Bolocam) mounted on the Caltech Submillimeter Observatory (CSO). The data are well described by a model including a extended Sunyaev\u2013Zel'dovich (SZ) emission from the cluster gas plus emission from the cluster central galaxy and two bright background submm galaxies magnified by the gravitational lensing of the cluster. We measure flux densities of the two bright point sources in the field: SMM J14011+0252 and SMM J14009+0252 to be 6.5 \u00b1 2.0 \u00b1 0.8 and 11.3 \u00b1 1.9 \u00b1 1.3 mJy, respectively. Fitting the map to a sky model consisting of the point sources and the SZ emission from the cluster gas with a beta model density profile with parameters, \u03b8_c= 33.6 arcsec and \u03b2= 0.69, we find the peak surface brightness of the SZ emission to be I_c= 3.73 \u00b1 0.45 \u00b1 0.60 \u00d7 10^(\u221221) W m^(\u22122)sr^(\u22121) Hz^(\u22121), where the first error is the statistical uncertainty in the fit and the second error represents the calibration uncertainty and additional systematics. Assuming zero cluster peculiar velocity and an X-ray temperature of T_e= 9 keV, this surface brightness corresponds to a central Comptonization of y_0= (4.41 \u00b1 0.53 \u00b1 0.70) \u00d7 10^(\u22124). The cluster image represents one of the highest significance SZ detections of a cluster in the positive region of the thermal SZ spectrum to date. We compare the measured central intensity at 1.1 mm to other SZ measurements of Abell 1835 at different wavelengths to obtain values for y_0= (3.58 \u00b1 0.28) \u00d7 10^(\u22124) and the cluster peculiar velocity v_z=\u2212538 \u00b1 414 km s^(\u22121).", "doi": "10.1111/j.1365-2966.2011.20295.x", "issn": "0035-8711", "publisher": "Royal Astronomical Society", "publication": "Monthly Notices of the Royal Astronomical Society", "publication_date": "2012-03-21", "series_number": "1", "volume": "421", "issue": "1", "pages": "224-234" }, { "id": "authors:9za0e-t0n75", "collection": "authors", "collection_id": "9za0e-t0n75", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120224-154734818", "type": "article", "title": "Cluster\u2013cluster lensing and the case of Abell 383", "author": [ { "family_name": "Zitrin", "given_name": "Adi", "orcid": "0000-0002-0350-4488", "clpid": "Zitrin-Adi" }, { "family_name": "Rephaeli", "given_name": "Yoel", "clpid": "Rephaeli-Y" }, { "family_name": "Sadeh", "given_name": "Sharon", "clpid": "Sadeh-S" }, { "family_name": "Medezinski", "given_name": "Elinor", "clpid": "Medezinski-E" }, { "family_name": "Umetsu", "given_name": "Keiichi", "orcid": "0000-0002-7196-4822", "clpid": "Umetsu-Keiichi" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Nonino", "given_name": "Mario", "orcid": "0000-0001-6342-9662", "clpid": "Nonino-M" }, { "family_name": "Morandi", "given_name": "Andrea", "clpid": "Morandi-A" }, { "family_name": "Molino", "given_name": "Alberto", "clpid": "Molino-A" }, { "family_name": "Czakon", "given_name": "Nicole", "clpid": "Czakon-N-G" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "Extensive surveys of galaxy clusters motivate us to assess the likelihood of cluster\u2013cluster lensing (CCL), namely, gravitational lensing of a background cluster by a foreground cluster. We briefly describe the characteristics of CCLs in optical, X-ray and Sunyaev\u2013Zel'dovich effect measurements, and calculate their predicted numbers for \u039b cold dark matter (\u039bCDM) parameters and a viable range of cluster mass functions and their uncertainties. The predicted number of CCLs in the strong-lensing regime varies from several (<10) to as high as a few dozen, depending mainly on whether lensing triaxiality bias is accounted for, through the\u2002c\u2013M\u2002relation. A much larger number is predicted when taking into account also CCL in the weak-lensing regime. In addition to few previously suggested CCLs, we report a detection of a possible CCL in A383, where background candidate high-z\u2002structures are magnified, as seen in deep Subaru observations.", "doi": "10.1111/j.1365-2966.2011.20155.x", "issn": "0035-8711", "publisher": "Royal Astronomical Society", "publication": "Monthly Notices of the Royal Astronomical Society", "publication_date": "2012-02-21", "series_number": "2", "volume": "420", "issue": "2", "pages": "1621-1629" }, { "id": "authors:bvqcg-dj851", "collection": "authors", "collection_id": "bvqcg-dj851", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20111031-091639877", "type": "article", "title": "143 GHz brightness measurements of Uranus, Neptune, and other secondary calibrators with Bolocam between 2003 and 2010", "author": [ { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "abstract": "Bolocam began collecting science data in 2003 as the long-wavelength imaging camera at the Caltech Submillimeter Observatory. The planets, along with a handful of secondary calibrators, have been used to determine the flux calibration for all of the data collected with Bolocam. Uranus and Neptune stand out as the only two planets that are bright enough to be seen with high signal-to-noise in short integrations without saturating the standard Bolocam readout electronics. By analyzing all of the 143 GHz observations made with Bolocam between 2003 and 2010, we find that the brightness ratio of Uranus to Neptune is 1.027 \u00b1 0.006, with no evidence for any variations over that period. Including previously published results at \u2243 150 GHz, we find a brightness ratio of 1.029 \u00b1 0.006 with no evidence for time variability over the period 1983-2010. Additionally, we find no evidence for time variability in the brightness ratio of either Uranus or Neptune to the ultracompact H II region G34.3 or the protostellar source NGC 2071IR. Using recently published Wilkinson Microwave Anisotropy Probe results we constrain the absolute 143 GHz brightness of both Uranus and Neptune to \u2243 3%. Finally, we present \u2243 3% absolute 143 GHz peak flux density values for the ultracompact H II regions G34.3 and K3-50A and the protostellar source NGC 2071IR.", "doi": "10.1088/0004-637X/744/2/169", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2012-01-10", "series_number": "2", "volume": "744", "issue": "2", "pages": "Art. No. 169" }, { "id": "authors:m1m84-2te26", "collection": "authors", "collection_id": "m1m84-2te26", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110722-144254403", "type": "article", "title": "Combined limits on WIMPs from the CDMS and EDELWEISS experiments", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "literal": "CDMS Collaboration" }, { "literal": "EDELWEISS Collaboration" } ], "abstract": "The CDMS and EDELWEISS collaborations have combined the results of their direct searches for dark matter using cryogenic germanium detectors. The total data set represents 614\u2009\u2009kg\u00b7days equivalent exposure. A straightforward method of combination was chosen for its simplicity before data were exchanged between experiments. The results are interpreted in terms of limits on spin-independent weakly interacting, massive particle (WIMP)-nucleon cross section. For a WIMP mass of 90\u2009\u2009GeV/c^2, where this analysis is most sensitive, a cross section of 3.3\u00d710^(-44)\u2009\u2009cm^2 is excluded at 90% C.L. At higher WIMP masses, the combination improves the individual limits, by a factor 1.6 above 700\u2009\u2009GeV/c^2. Alternative methods of combining the data provide stronger constraints for some ranges of WIMP masses and weaker constraints for others.", "doi": "10.1103/PhysRevD.84.011102", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2011-07-05", "series_number": "1", "volume": "84", "issue": "1", "pages": "Art. No. 011102" }, { "id": "authors:m81b4-30v05", "collection": "authors", "collection_id": "m81b4-30v05", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110620-091015212", "type": "article", "title": "Search for inelastic dark matter with the CDMS II experiment", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "literal": "CDMS Collaboration" } ], "abstract": "Results are presented from a reanalysis of the entire five-tower data set acquired with the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory, with an exposure of 969 kg-days. The analysis window was extended to a recoil energy of 150 keV, and an improved surface-event background-rejection cut was defined to increase the sensitivity of the experiment to the inelastic dark matter (iDM) model. Three dark matter candidates were found between 25 keV and 150 keV. The probability to observe three or more background events in this energy range is 11%. Because of the occurrence of these events, the constraints on the iDM parameter space are slightly less stringent than those from our previous analysis, which used an energy window of 10\u2013100 keV.", "doi": "10.1103/PhysRevD.83.112002", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2011-06-01", "series_number": "11", "volume": "83", "issue": "11", "pages": "Art. No. 112002" }, { "id": "authors:kfrk3-xy453", "collection": "authors", "collection_id": "kfrk3-xy453", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110526-080113736", "type": "article", "title": "The CDMS II Data Acquisition System", "author": [ { "family_name": "Bauer", "given_name": "D. A.", "clpid": "Bauer-D-A" }, { "family_name": "Burke", "given_name": "S.", "clpid": "Burke-S" }, { "family_name": "Cooley", "given_name": "J.", "clpid": "Cooley-J" }, { "family_name": "Crisler", "given_name": "M.", "clpid": "Crisler-M" }, { "family_name": "Cushman", "given_name": "P.", "clpid": "Cushman-P" }, { "family_name": "DeJongh", "given_name": "F.", "clpid": "DeJongh-F" }, { "family_name": "Duong", "given_name": "L.", "clpid": "Duong-L" }, { "family_name": "Ferril", "given_name": "R.", "clpid": "Ferril-R" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hall", "given_name": "J.", "clpid": "Hall-J" }, { "family_name": "Holmgren", "given_name": "D.", "clpid": "Holmgren-D" }, { "family_name": "Mahapatra", "given_name": "R.", "clpid": "Mahapatra-R" }, { "family_name": "Nelson", "given_name": "H.", "clpid": "Nelson-H" }, { "family_name": "Reisetter", "given_name": "A.", "clpid": "Reisetter-A" }, { "family_name": "Sander", "given_name": "J.", "clpid": "Sander-J" }, { "family_name": "Savage", "given_name": "C.", "clpid": "Savage-C" } ], "abstract": "The Data Acquisition System for the CDMS II dark matter experiment was designed and built when the experiment moved to its new underground installation at the Soudan Lab. The combination of remote operation and increased data load necessitated a completely new design. Elements of the original LabView system remained as stand-alone diagnostic programs, but the main data processing moved to a VME-based system with custom electronics for signal conditioning, trigger formation and buffering. The data rate was increased 100-fold and the automated cryogenic system was linked to the data acquisition. A modular server framework with associated user interfaces was implemented in Java to allow control and monitoring of the entire experiment remotely.", "doi": "10.1016/j.nima.2011.02.059", "issn": "0168-9002", "publisher": "Elsevier", "publication": "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment", "publication_date": "2011-05-11", "series_number": "1", "volume": "638", "issue": "1", "pages": "127-133" }, { "id": "authors:1re0a-wzf37", "collection": "authors", "collection_id": "1re0a-wzf37", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110707-085644892", "type": "book_section", "title": "Status of BetaCage: an Ultra-sensitive Screener for Surface\n Contamination", "book_title": "Topical Workshop on Low Radioactivity Techniques (LRT 2010)", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Grant", "given_name": "D. R.", "clpid": "Grant-D-R" }, { "family_name": "Kos", "given_name": "M.", "clpid": "Kos-M" }, { "family_name": "Nelson", "given_name": "R. H.", "clpid": "Nelson-R-H" }, { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Wang", "given_name": "B.", "clpid": "Wang-B" } ], "contributor": [ { "family_name": "Ford", "given_name": "R.", "clpid": "Ford-R" }, { "family_name": "Mine", "given_name": "Creighton", "clpid": "Mine-C" } ], "abstract": "BetaCage, a gaseous neon time-projection chamber, has been proposed as a viable screener for emitters of low-energy alphas and electrons to which commercial radioactivity counting techniques are insensitive. Using radiopure materials for construction, active and passive shielding from extrinsic backgrounds, large counting area and minimal detector mass, BetaCage will be able to achieve sensitivities of 10^(\u22125) counts keV^(\u22121) kg^(\u22121) day^(\u22121) in a few days of running time. We report on progress in prototype development work since the last meeting of this workshop.", "doi": "10.1063/1.3579564", "isbn": "978-0-7354-0892-0", "publisher": "American Institute of Physics", "publication_date": "2011-04-27", "pages": "88-92" }, { "id": "authors:21yze-krn42", "collection": "authors", "collection_id": "21yze-krn42", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110419-092711120", "type": "article", "title": "Results from a Low-Energy Analysis of the CDMS II Germanium Data", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "literal": "CDMS Collaboration" } ], "abstract": "We report results from a reanalysis of data from the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory. Data taken between October 2006 and September 2008 using eight germanium detectors are reanalyzed with a lowered, 2 keV recoil-energy threshold, to give increased sensitivity to interactions from weakly interacting massive particles (WIMPs) with masses below ~10\u2009\u2009GeV/c^2. This analysis provides stronger constraints than previous CDMS II results for WIMP masses below 9\u2009\u2009GeV/c^2 and excludes parameter space associated with possible low-mass WIMP signals from the DAMA/LIBRA and CoGeNT experiments.", "doi": "10.1103/PhysRevLett.106.131302", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2011-03-30", "series_number": "13", "volume": "106", "issue": "13", "pages": "Art. No. 131302" }, { "id": "authors:xs01n-nd284", "collection": "authors", "collection_id": "xs01n-nd284", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110316-082111831", "type": "article", "title": "Cluster Morphologies and Model-independent Y_(SZ) Estimates from Bolocam Sunyaev-Zel'dovich Images", "author": [ { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Ameglio", "given_name": "S.", "clpid": "Ameglio-S" }, { "family_name": "Pierpaoli", "given_name": "E.", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" } ], "abstract": "

We present initial results from our ongoing program to image the Sunyaev–Zel'dovich (SZ) effect in galaxy clusters at 143 GHz using Bolocam; five clusters and one blank field are described in this manuscript. The images have a resolution of 58 arcsec and a radius of \u22436–7 arcmin, which is approximately r500–2r500 for these clusters. We effectively high-pass filter our data in order to subtract noise sourced by atmospheric fluctuations, but we are able to obtain unbiased images of the clusters by deconvolving the effects of this filter. The beam-smoothed rms is \u224310 μKCMB in these images; with this sensitivity, we are able to detect the SZ signal to beyond r500 in binned radial profiles. We have fit our images to beta and Nagai models, fixing spherical symmetry or allowing for ellipticity in the plane of the sky, and we find that the best-fit parameter values are in general consistent with those obtained from other X-ray and SZ data. Our data show no clear preference for the Nagai model or the beta model due to the limited spatial dynamic range of our images. However, our data show a definitive preference for elliptical models over spherical models, quantified by an F ratio of \u224320 for the two models. The weighted mean ellipticity of the five clusters is ε = 0.27 ± 0.03, consistent with results from X-ray data. Additionally, we obtain model-independent estimates of Y500, the integrated SZ y-parameter over the cluster face to a radius of r500, with systematics-dominated uncertainties of \u224310%. Our Y500 values, which are free from the biases associated with model-derived Y500 values, scale with cluster mass in a way that is consistent with both self-similar predictions and expectations of a \u224310% intrinsic scatter.

", "doi": "10.1088/0004-637X/728/1/39", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2011-02-10", "series_number": "1", "volume": "728", "issue": "1", "pages": "Art. No. 39" }, { "id": "authors:ra323-dwd61", "collection": "authors", "collection_id": "ra323-dwd61", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110315-091121882", "type": "article", "title": "Low-threshold analysis of CDMS shallow-site data", "author": [ { "family_name": "Akerib", "given_name": "D. S.", "clpid": "Akerib-D-S" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "literal": "CDMS Collaboration" } ], "abstract": "Data taken during the final shallow-site run of the first tower of the Cryogenic Dark Matter Search (CDMS II) detectors have been reanalyzed with improved sensitivity to small energy depositions. Four ~224 g germanium and two ~105 g silicon detectors were operated at the Stanford Underground Facility (SUF) between December 2001 and June 2002, yielding 118 live days of raw exposure. Three of the\ngermanium and both silicon detectors were analyzed with a new low-threshold technique, making it possible to lower the germanium and silicon analysis thresholds down to the actual trigger thresholds of ~1 and ~2 keV, respectively. Limits on the spin-independent cross section for weakly interacting massive particles (WIMPs) to elastically scatter from nuclei based on these data exclude interesting parameter space for WIMPs with masses below 9 GeV/c^2. Under standard halo assumptions, these data partially exclude parameter space favored by interpretations of the DAMA/LIBRA and CoGeNT experiments' data as WIMP signals, and exclude new parameter space for WIMP masses between 3 and 4 GeV/c^2.", "doi": "10.1103/PhysRevD.82.122004", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2010-12-22", "series_number": "12", "volume": "82", "issue": "12", "pages": "Art. No. 122004" }, { "id": "authors:szp1r-nns76", "collection": "authors", "collection_id": "szp1r-nns76", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161104-145534788", "type": "book_section", "title": "Optical design of the EPIC-IM crossed Dragone telescope", "book_title": "Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave", "author": [ { "family_name": "Tran", "given_name": "Huan", "clpid": "Tran-Huan" }, { "family_name": "Bock", "given_name": "James", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Dickenson", "given_name": "Clive", "clpid": "Dickenson-C" }, { "family_name": "Dowell", "given_name": "Darren", "clpid": "Dowell-D" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "G\u00f3rski", "given_name": "Krzysztof", "clpid": "G\u00f3rski-K-M" }, { "family_name": "Lange", "given_name": "Andrew", "clpid": "Lange-A-E" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Oschmann", "given_name": "Jacobus M., Jr.", "clpid": "Oschmann-J-M-Jr" }, { "family_name": "Clampin", "given_name": "Mark C.", "clpid": "Clampin-M-C" }, { "family_name": "MacEwen", "given_name": "Howard A.", "clpid": "MacEwen-H-A" } ], "abstract": "The Experimental Probe of Inflationary Cosmology - Intermediate Mission (EPIC-IM) is a concept for the NASA Einstein Inflation Probe satellite. EPIC-IM is designed to characterize the polarization properties of the Cosmic Microwave Background to search for the B-mode polarization signal characteristic of gravitational waves generated during the epoch of Inflation in the early universe. EPIC-IM employs a large focal plane with 11,000 detectors operating in 9 wavelength bands to provide 30 times higher sensitivity than the currently operating Planck satellite. The optical design is based on a wide-field 1.4 m crossed-Dragone telescope, an aperture that allows not only comprehensive measurements of Inflationary B-mode polarization, but also measurements of the E-mode and lensing polarization signals to cosmological limits, as well as all-sky maps of Galactic polarization with unmatched sensitivity and angular resolution. The optics are critical to measuring these extremely faint polarization signals, and any design must meet demanding requirements on systematic error control. We describe the EPIC-IM crossed Dragone optical design, its polarization properties, and far-sidelobe response.", "doi": "10.1117/12.857423", "isbn": "978-0-81948-221-1", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2010-08-05", "pages": "Art. No. 77311R" }, { "id": "authors:d8axe-knn13", "collection": "authors", "collection_id": "d8axe-knn13", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110311-145010354", "type": "book_section", "title": "SPIDER: a balloon-borne CMB polarimeter for large angular scales", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dor\u00e9", "given_name": "O.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Mason", "given_name": "P. V.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Morford", "given_name": "T. A.", "clpid": "Morford-T-A" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Schenker", "given_name": "M. A.", "clpid": "Schenker-M-A" }, { "family_name": "Trangsrud", "given_name": "A.", "clpid": "Trangsrud-Amy-R" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "We describe SPIDER, a balloon-borne instrument to map the polarization of the millimeter-wave sky with degree angular resolution. Spider consists of six monochromatic refracting telescopes, each illuminating a focal plane of large-format antenna-coupled bolometer arrays. A total of 2,624 superconducting transition-edge sensors are distributed among three observing bands centered at 90, 150, and 280 GHz. A cold half-wave plate at the aperture of each telescope modulates the polarization of incoming light to control systematics. SPIDER's first flight will be a 20-30-day Antarctic balloon campaign in December 2011. This flight will map ~8% of the sky to achieve unprecedented sensitivity to the polarization signature of the gravitational wave background predicted by inflationary cosmology. The SPIDER mission will also serve as a proving ground for these detector technologies in preparation for a future satellite mission.", "doi": "10.1117/12.857720", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77411N" }, { "id": "authors:fhnh2-bfp12", "collection": "authors", "collection_id": "fhnh2-bfp12", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161101-142206572", "type": "book_section", "title": "MKID multicolor array status and results from DemoCam", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Schlaerth", "given_name": "James A.", "clpid": "Schlaerth-J-A" }, { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Downes", "given_name": "Thomas P.", "clpid": "Downes-T-P" }, { "family_name": "Duan", "given_name": "Ran", "clpid": "Duan-Ran" }, { "family_name": "Gao", "given_name": "Jiansong", "clpid": "Gao-Jiansong" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "Matthew I.", "clpid": "Hollister-M-I" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-H-G" }, { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "Maloney", "given_name": "Philip R.", "clpid": "Maloney-P-R" }, { "family_name": "Noroozian", "given_name": "Omid", "clpid": "Noroozian-O" }, { "family_name": "Nguyen", "given_name": "Hien T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Siegel", "given_name": "Seth", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Vaillancourt", "given_name": "John E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Vayonakis", "given_name": "Anastasios", "clpid": "Vayonakis-A" }, { "family_name": "Wilson", "given_name": "Philip R.", "clpid": "Wilson-P-R" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "We present the results of the latest multicolor Microwave Kinetic Inductance Detector (MKID) focal plane arrays in the submillimeter. The new detectors on the arrays are superconducting resonators which combine a coplanar waveguide section with an interdigitated capacitor, or IDC. To avoid out-of-band pickup by the capacitor, a stepped-impedance filter is used to prevent radiation from reaching the absorptive aluminum section of the resonator. These arrays are tested in the preliminary demonstration instrument, DemoCam, a precursor to the Multicolor Submillimeter Inductance Camera, MUSIC. We present laboratory results of the responsivity to light both in the laboratory and at the Caltech Submillimeter Observatory. We assess the performance of the detectors in filtering out-of-band radiation, and find the level of excess load and its effect on detector performance. We also look at the array design characteristics, and the implications for the optimization of sensitivities expected by MUSIC.", "doi": "10.1117/12.857688", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 774109" }, { "id": "authors:rd340-2sm63", "collection": "authors", "collection_id": "rd340-2sm63", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110311-145010784", "type": "book_section", "title": "An open-source readout for MKIDs", "book_title": "Millimeter, submillimeter, and far-infrared detectors and instrumentation for astronomy V", "author": [ { "family_name": "Duan", "given_name": "Ran", "clpid": "Duan-Ran" }, { "family_name": "McHugh", "given_name": "Sean", "clpid": "McHugh-S" }, { "family_name": "Serfass", "given_name": "Bruno", "clpid": "Serfass-B" }, { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "Merrill", "given_name": "Andrew", "clpid": "Merrill-A" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Downes", "given_name": "Thomas P.", "clpid": "Downes-T-P" }, { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Gao", "given_name": "Jiansong", "clpid": "Gao-Jiansong" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Hollister", "given_name": "Matthew I.", "clpid": "Hollister-M-I" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-H-G" }, { "family_name": "Maloney", "given_name": "Philip R.", "clpid": "Maloney-P-R" }, { "family_name": "Noroozian", "given_name": "Omid", "clpid": "Noroozian-O" }, { "family_name": "Nguyen", "given_name": "Hien T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Schlaerth", "given_name": "James A.", "clpid": "Schlaerth-J-A" }, { "family_name": "Siegel", "given_name": "Seth", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Vaillancourt", "given_name": "John E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Vayonakis", "given_name": "Anastasios", "clpid": "Vayonakis-A" }, { "family_name": "Wilson", "given_name": "Philip R.", "clpid": "Wilson-P-R" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "This paper will present the design, implementation, performance analysis of an open source readout system\nfor arrays of microwave kinetic inductance detectors (MKID) for mm/submm astronomy. The readout system will perform frequency domain multiplexed real-time complex microwave transmission measurements in order to monitor the instantaneous resonance frequency and dissipation of superconducting microresonators. Each readout unit will be able to cover up to 550 MHz bandwidth and readout 256 complex frequency channels simultaneously. The digital electronics include the customized DAC, ADC, IF system and the FPGA based signal processing hardware developed by CASPER group. The entire system is open sourced, and can be customized to meet challenging requirement in many applications: e.g. MKID, MSQUID etc.", "doi": "10.1117/12.856832", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77411V" }, { "id": "authors:1knjx-1qt80", "collection": "authors", "collection_id": "1knjx-1qt80", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161031-084709465", "type": "book_section", "title": "Thermal architecture for the SPIDER flight cryostat", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Gudmundsson", "given_name": "J. E.", "clpid": "Gudmundsson-J-E" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dor\u00e9", "given_name": "O.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Mason", "given_name": "P. V.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Morford", "given_name": "T. A.", "clpid": "Morford-T-A" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Schenker", "given_name": "M. A.", "clpid": "Schenker-M-A" }, { "family_name": "Trangsrud", "given_name": "A.", "clpid": "Trangsrud-Amy-R" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "We describe the cryogenic system for SPIDER, a balloon-borne microwave polarimeter that will map 8% of the sky with degree-scale angular resolution. The system consists of a 1284 L liquid helium cryostat and a 16 L capillary-filled superfluid helium tank, which provide base operating temperatures of 4 K and 1.5 K, respectively. Closed-cycle 3He adsorption refrigerators supply sub-Kelvin cooling power to multiple focal planes, which are housed in monochromatic telescope inserts. The main helium tank is suspended inside the vacuum vessel with thermally insulating fiberglass flexures, and shielded from thermal radiation by a combination of two vapor cooled shields and multi-layer insulation. This system allows for an extremely low instrumental background and a hold time in excess of 25 days. The total mass of the cryogenic system, including cryogens, is approximately 1000 kg. This enables conventional long duration balloon flights. We will discuss the design, thermal analysis, and qualification of the cryogenic system.", "doi": "10.1117/12.857925", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77411M" }, { "id": "authors:kxxqb-qkc91", "collection": "authors", "collection_id": "kxxqb-qkc91", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110315-094044621", "type": "book_section", "title": "Antenna-coupled TES Bolometer Arrays for BICEP2/Keck and SPIDER", "book_title": "Millimeter, submillimeter, and far-infrared detectors and instrumentation for astronomy V", "author": [ { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W-IV" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Sudiwala", "given_name": "R.", "clpid": "Sudiwala-R" }, { "family_name": "Teply", "given_name": "G.", "clpid": "Teply-G-P" }, { "family_name": "Trangsrud", "given_name": "A. R.", "clpid": "Trangsrud-Amy-R" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "BICEP2/Keck and SPIDER are cosmic microwave background (CMB) polarimeters targeting the B-mode polarization\ninduced by primordial gravitational waves from inflation. They will be using planar arrays of polarization\nsensitive antenna-coupled TES bolometers, operating at frequencies between 90 GHz and 220 GHz. At 150 GHz\neach array consists of 64 polarimeters and four of these arrays are assembled together to make a focal plane, for a\ntotal of 256 dual-polarization elements (512 TES sensors). The detector arrays are integrated with a time-domain\nSQUID multiplexer developed at NIST and read out using the multi-channel electronics (MCE) developed at\nthe University of British Columbia. Following our progress in improving detector parameters uniformity across\nthe arrays and fabrication yield, our main effort has focused on improving detector arrays optical and noise\nperformances, in order to produce science grade focal planes achieving target sensitivities. We report on changes\nin detector design implemented to optimize such performances and following focal plane arrays characterization.\nBICEP2 has deployed a first 150 GHz science grade focal plane to the South Pole in December 2009.", "doi": "10.1117/12.857914", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77410H" }, { "id": "authors:xs7fe-06n21", "collection": "authors", "collection_id": "xs7fe-06n21", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110310-151608268", "type": "book_section", "title": "Design and performance of the SPIDER instrument", "book_title": "Millimeter, submillimeter, and far-infrared detectors and instrumentation for astronomy V", "author": [ { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dor\u00e9", "given_name": "O.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Mason", "given_name": "P. V.", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Morford", "given_name": "T. A.", "clpid": "Morford-T-A" }, { "family_name": "Schenker", "given_name": "M. A.", "clpid": "Schenker-M-A" }, { "family_name": "Transgrud", "given_name": "A.", "clpid": "Transgrud-Amy-R" }, { "family_name": "Tucker", "given_name": "R. S.", "clpid": "Tucker-Rebecca-S" }, { "literal": "SPIDER Collaboration" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "Here we describe the design and performance of the SPIDER instrument. SPIDER is a balloon-borne cosmic microwave background polarization imager that will map part of the sky at 90, 145, and 280 GHz with subdegree resolution and high sensitivity. This paper discusses the general design principles of the instrument inserts, mechanical structures, optics, focal plane architecture, thermal architecture, and magnetic shielding of the TES sensors and SQUID multiplexer. We also describe the optical, noise, and magnetic shielding performance of the 145 GHz prototype instrument insert.", "doi": "10.1117/12.857715", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77411O" }, { "id": "authors:4bnft-w4622", "collection": "authors", "collection_id": "4bnft-w4622", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161108-130538410", "type": "book_section", "title": "ARCHONS: a highly multiplexed superconducting optical to near-IR camera", "book_title": "Ground-based and Airborne Instrumentation for Astronomy III", "author": [ { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "O'Brien", "given_name": "Kieran", "clpid": "O'Brien-K" }, { "family_name": "McHugh", "given_name": "Sean", "clpid": "McHugh-S" }, { "family_name": "Bumble", "given_name": "Bruce", "clpid": "Bumble-B" }, { "family_name": "Moore", "given_name": "David", "clpid": "Moore-D" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "McLean", "given_name": "Ian S.", "clpid": "McLean-I-S" }, { "family_name": "Ramsay", "given_name": "Suzanne K.", "clpid": "Ramsay-S-K" }, { "family_name": "Takami", "given_name": "Hideki", "clpid": "Takami-Hideki" } ], "abstract": "We report on the development of ARCONS, the ARray Camera for Optical to Near-IR Spectrophotometry. This photon counting integral field unit (IFU), being built at UCSB and Caltech with detectors fabricated at JPL, will use a unique, highly multiplexed low temperature detector technology known as Microwave Kinetic Inductance Detectors (MKIDs). These detectors, which operate at 100 mK, should provide photon counting with energy resolution of R = E/\u03b4E > 20 and time resolution of a microsecond, with a quantum efficiency of around 50%. We expect to field the instrument at the Palomar 200\" telescope in the first quarter of 2011 with an array containing 1024 pixels in a 32\u00d732 pixel form factor to yield a field of view of approximately 10\u00d710 arcseconds. The bandwidth of the camera is limited by the rising sky count rate at longer wavelengths, but we anticipate a bandwidth of 0.35 to 1.35 \u03bcm will be achievable. A simple optical path and compact dewar utilizing a cryogen-free adiabatic demagnetization refridgerator (ADR) allows the camera to be deployed quickly at Naysmith or Coud\u00e9 foci at a variety of telescopes. A highly expandable software defined radio (SDR) readout that can scale up to much larger arrays has been developed.", "doi": "10.1117/12.856440", "isbn": "9780819482259", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 773518" }, { "id": "authors:n93yr-6h010", "collection": "authors", "collection_id": "n93yr-6h010", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161101-104305650", "type": "book_section", "title": "MUSIC for sub/millimeter astrophysics", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Maloney", "given_name": "Philip R.", "clpid": "Maloney-P-R" }, { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Downes", "given_name": "Thomas P.", "clpid": "Downes-T-P" }, { "family_name": "Duan", "given_name": "Ran", "clpid": "Duan-R" }, { "family_name": "Gao", "given_name": "Jiansong", "clpid": "Gao-Jiansong" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "Matt I.", "clpid": "Hollister-M-I" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-H-G" }, { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "McHugh", "given_name": "Sean G.", "clpid": "McHugh-S-G" }, { "family_name": "Noroozian", "given_name": "Omid", "clpid": "Noroozian-O" }, { "family_name": "Nguyen", "given_name": "Hien T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Schlaerth", "given_name": "James A.", "clpid": "Schlaerth-J-A" }, { "family_name": "Siegel", "given_name": "Seth", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Vaillancourt", "given_name": "John E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Vayonakis", "given_name": "Anastasios", "clpid": "Vayonakis-A" }, { "family_name": "Wilson", "given_name": "Philip", "clpid": "Wilson-P" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "MUSIC (the Multiwavelength Submillimeter kinetic Inductance Camera) is an instrument being developed for the Caltech Submillimeter Observatory by Caltech, JPL, the University of Colorado, and UCSB. MUSIC uses microwave kinetic inductance detectors (MKIDs) - superconducting micro-resonators - as photon detectors. The readout is almost entirely at room temperature and is highly multiplexed. MUSIC will have 576 spatial pixels in four bands at 850, 1100, 1300 and 2000 microns. MUSIC is scheduled for deployment at the CSO in the winter of 2010/2011. We present an overview of the camera design and readout and describe the current status of the instrument and some results from the highly successful May/June 2010 observing run at the CSO with the prototype camera, which verified the performance of the complete system (optics, antennas/filters, resonators, and readout) and produced the first simultaneous 3-color observations with any MKID camera.", "doi": "10.1117/12.857751", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77410F" }, { "id": "authors:mecz6-cxe66", "collection": "authors", "collection_id": "mecz6-cxe66", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161031-091635167", "type": "book_section", "title": "The Keck Array: a pulse tube cooled CMB polarimeter", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Sheehy", "given_name": "C. D.", "clpid": "Sheehy-C-D" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Lueker", "given_name": "M.", "clpid": "Lueker-M" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Staniszewski", "given_name": "Z.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G.", "clpid": "Teply-G-P" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "The Keck Array is a cosmic microwave background (CMB) polarimeter that will begin observing from the South Pole in late 2010. The initial deployment will consist of three telescopes similar to BICEP2 housed in ultracompact, pulse tube cooled cryostats. Two more receivers will be added the following year. In these proceedings we report on the design and performance of the Keck cryostat. We also report some initial results on the performance of antenna-coupled TES detectors operating in the presence of a pulse tube. We find that the performance of the detectors is not seriously impacted by the replacement of BICEP2's liquid helium cryostat with a pulse tube cooled cryostat.", "doi": "10.1117/12.857871", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77411R" }, { "id": "authors:31kw5-97z83", "collection": "authors", "collection_id": "31kw5-97z83", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110311-145010009", "type": "book_section", "title": "Initial performance of the BICEP2 antenna-coupled superconducting bolometers at the South Pole", "book_title": "Millimeter, submillimeter, and far-infrared detectors and instrumentation for astronomy V", "author": [ { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Runyan", "given_name": "M.", "clpid": "Runyan-M-C" }, { "family_name": "Staniszewski", "given_name": "Z.", "clpid": "Staniszewski-Z-K" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "We report on the preliminary detector performance of the Bicep2 mm-wave polarimeter, deployed in 2009 to the South Pole. Bicep2 is currently imaging the polarization of the cosmic microwave background at 150 GHz using an array of 512 antenna-coupled superconducting bolometers. The antennas, band-defining filters and transition edge sensor (TES) bolometers are photolithographically fabricated on 4 silicon tiles. Each tile consists of an 8\u00d78 grid of ~7 mm spatial pixels, for a total of 256 detector pairs. A patial pixel contains 2 sets of orthogonal antenna slots summed in-phase, with each set coupled to a TES by a filtered microstrip. The detectors are read out using time-domain multiplexed SQUIDs. The detector pair of each spatial pixel is differenced to measure polarization. We report on the performance of the Bicep2 detectors in the field, including the focal plane yield, detector and multiplexer optimization, detector noise and stability, and a preliminary estimate of the improvement in mapping speed compared to Bicep1.", "doi": "10.1117/12.857861", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77411H" }, { "id": "authors:h4r17-5r466", "collection": "authors", "collection_id": "h4r17-5r466", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161028-143802081", "type": "book_section", "title": "Modeling and characterization of the SPIDER half-wave plate", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Bryan", "given_name": "Sean A.", "clpid": "Bryan-S-A" }, { "family_name": "Bock", "given_name": "James J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Crill", "given_name": "Brendan P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dore", "given_name": "Olivier", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Filippini", "given_name": "Jeffrey P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "Viktor V.", "clpid": "Hristov-V-V" }, { "family_name": "Mason", "given_name": "Peter", "orcid": "0000-0002-7963-7420", "clpid": "Mason-P-V" }, { "family_name": "Morford", "given_name": "Tracy", "clpid": "Morford-T-A" }, { "family_name": "Runyan", "given_name": "Marcus C.", "clpid": "Runyan-M-C" }, { "family_name": "Schenker", "given_name": "Matthew A.", "clpid": "Schenker-M-A" }, { "family_name": "Trangsrud", "given_name": "Amy", "clpid": "Trangsrud-Amy-R" }, { "family_name": "Tucker", "given_name": "Rebecca", "clpid": "Tucker-Rebecca-S" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "Spider is a balloon-borne array of six telescopes that will observe the Cosmic Microwave Background. The 2624 antenna-coupled bolometers in the instrument will make a polarization map of the CMB with approximately one-half degree resolution at 145 GHz. Polarization modulation is achieved via a cryogenic sapphire half-wave plate (HWP) skyward of the primary optic. We have measured millimeter-wave transmission spectra of the sapphire at room and cryogenic temperatures. The spectra are consistent with our physical optics model, and the data gives excellent measurements of the indices of A-cut sapphire. We have also taken preliminary spectra of the integrated HWP, optical system, and detectors in the prototype Spider receiver. We calculate the variation in response of the HWP between observing the CMB and foreground spectra, and estimate that it should not limit the Spider constraints on inflation.", "doi": "10.1117/12.857837", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77412B" }, { "id": "authors:m7qf4-gyh58", "collection": "authors", "collection_id": "m7qf4-gyh58", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110314-113025025", "type": "book_section", "title": "The cryomechanical design of MUSIC: a novel imaging instrument for millimeter-wave astrophysics at the Caltech Submillimeter Observatory", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Hollister", "given_name": "Matthew I.", "clpid": "Hollister-M-I" }, { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Downes", "given_name": "Thomas P.", "clpid": "Downes-T-P" }, { "family_name": "Duan", "given_name": "Ran", "clpid": "Duan-Ran" }, { "family_name": "Gao", "given_name": "Jiansong", "clpid": "Gao-Jiansong" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-H-G" }, { "family_name": "Maloney", "given_name": "Phillip R.", "clpid": "Maloney-P-R" }, { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "Nguyen", "given_name": "Hien Trong", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Noroozian", "given_name": "Omid", "clpid": "Noroozian-O" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Schlaerth", "given_name": "James", "clpid": "Schlaerth-J" }, { "family_name": "Siegel", "given_name": "Seth", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Vaillancourt", "given_name": "John E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Vayonakis", "given_name": "Anastasios", "clpid": "Vayonakis-A" }, { "family_name": "Wilson", "given_name": "Philip", "clpid": "Wilson-P" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "MUSIC (Multicolor Submillimeter kinetic Inductance Camera) is a new facility instrument for the Caltech Submillimeter Observatory (Mauna Kea, Hawaii) developed as a collaborative effect of Caltech, JPL, the University of Colorado at Boulder and UC Santa Barbara, and is due for initial commissioning in early 2011. MUSIC utilizes a new class of superconducting photon detectors known as microwave kinetic inductance detectors (MKIDs), an emergent technology that offers considerable advantages over current types of detectors for submillimeter and millimeter direct detection. MUSIC will operate a focal plane of 576 spatial pixels, where each pixel is a slot line antenna coupled to multiple detectors through on-chip, lumped-element filters, allowing simultaneously imaging in four bands at 0.86, 1.02, 1.33 and 2.00 mm. The MUSIC instrument is designed for closed-cycle operation, combining a pulse tube cooler with a two-stage Helium-3 adsorption refrigerator, providing a focal plane temperature of 0.25 K with intermediate temperature stages at approximately 50, 4 and 0.4 K for buffering heat loads and heat sinking of optical filters. Detector readout is achieved using semi-rigid coaxial cables from room temperature to the focal plane, with cryogenic HEMT amplifiers operating at 4 K. Several hundred detectors may be multiplexed in frequency space through one signal line and amplifier. This paper discusses the design of the instrument cryogenic hardware, including a number of features unique to the implementation of superconducting detectors. Predicted performance data for the instrument system will also be presented and discussed.", "doi": "10.1117/12.856780", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77411L" }, { "id": "authors:2p4fw-0wx66", "collection": "authors", "collection_id": "2p4fw-0wx66", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110311-145009599", "type": "book_section", "title": "Optical Performance of the BICEP2 Telescope at the South Pole", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Aikin", "given_name": "Randol W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Richter", "given_name": "S.", "clpid": "Richter-S" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "Bicep2 deployed to the South Pole during the 2009-2010 austral summer, and is now mapping the polarization of the cosmic microwave background (CMB), searching for evidence of inflationary cosmology. Bicep2 belongs to a new class of telescopes including Keck (ground-based) and Spider (balloon-borne) that follow on Bicep's strategy of employing small, cold, on-axis refracting optics. This common design provides key advantages ideal for targeting the polarization signature from inflation, including: (i) A large field of view, allowing substantial light collecting power despite the small aperture, while still resolving the degree-scale polarization of the CMB; (ii) liquid helium-cooled optics and cold stop, allowing for low, stable instrument loading; (iii) the ability to rotate the entire telescope about the boresight; (iv) a baffled primary aperture, reducing sidelobe pickup; and (v) the ability to characterize the far field optical performance of the telescope using ground-based sources. We describe the last of these advantages in detail, including our efforts to measure the main beam shape, beammatch between orthogonally-polarized pairs, polarization efficiency and response angle, sidelobe pickup, and ghost imaging. We do so with ground-based polarized microwave sources mounted in the far field as well as with astronomical calibrators. Ultimately, Bicep2's sensitivity to CMB polarization from inflation will rely on precise calibration of these beam features.", "doi": "10.1117/12.857868", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77410V" }, { "id": "authors:ssan2-ac704", "collection": "authors", "collection_id": "ssan2-ac704", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161031-081454194", "type": "book_section", "title": "The BICEP2 CMB polarization experiment", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Ogburn", "given_name": "R. W., IV", "clpid": "Ogburn-R-W-IV" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Bonetti", "given_name": "J. A.", "clpid": "Bonetti-J-A" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Runyan", "given_name": "M. C.", "clpid": "Runyan-M-C" }, { "family_name": "Staniszewski", "given_name": "Z. K.", "clpid": "Staniszewski-Z-K" }, { "family_name": "Teply", "given_name": "G. P.", "clpid": "Teply-G-P" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "The Bicep2 telescope is designed to measure the polarization of the cosmic microwave background on angular scales near 2-4 degrees, near the expected peak of the B-mode polarization signal induced by primordial gravitational waves from inflation. Bicep2 follows the success of Bicep, which has set the most sensitive current limits on B-modes on 2-4 degree scales. The experiment adopts a new detector design in which beam-defining slot antennas are coupled to TES detectors photolithographically patterned in the same silicon wafer, with multiplexing SQUID readout. Bicep2 takes advantage of this design's higher focal-plane packing density, ease of fabrication, and multiplexing readout to field more detectors than Bicep1, improving mapping speed by nearly a factor of 10. Bicep2 was deployed to the South Pole in November 2009 with 500 polarization-sensitive detectors at 150 GHz, and is funded for two seasons of observation. The first months' data demonstrate the performance of the Caltech/JPL antenna-coupled TES arrays, and two years of observation with Bicep2 will achieve unprecedented sensitivity to B-modes on degree angular scales.", "doi": "10.1117/12.857864", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77411G" }, { "id": "authors:s6btb-fvp89", "collection": "authors", "collection_id": "s6btb-fvp89", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110311-145009264", "type": "book_section", "title": "Optimization of MKID Noise Performance Via Readout Technique for Astronomical Applications", "book_title": "Millimeter, submillimeter, and far-infrared detectors and instrumentation for astronomy V", "author": [ { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Schlaerth", "given_name": "James A.", "clpid": "Schlaerth-J-A" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Downes", "given_name": "Thomas P.", "clpid": "Downes-T-P" }, { "family_name": "Duan", "given_name": "Ran P.", "clpid": "Duan-R-P" }, { "family_name": "Gao", "given_name": "Jiansong", "clpid": "Gao-Jiansong" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "Matt I.", "clpid": "Hollister-M-I" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-H-G" }, { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "Maloney", "given_name": "Phillip R.", "clpid": "Maloney-P-R" }, { "family_name": "Noroozian", "given_name": "Omid", "clpid": "Noroozian-O" }, { "family_name": "Nguyen", "given_name": "Hien T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Siegel", "given_name": "Seth", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Vaillancourt", "given_name": "John E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Vayonakis", "given_name": "Anastasios", "clpid": "Vayonakis-A" }, { "family_name": "Wilson", "given_name": "Philip R.", "clpid": "Wilson-P-R" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "Detectors employing superconducting microwave kinetic inductance detectors (MKIDs) can be read out by measuring changes in either the resonator frequency or dissipation. We will discuss the pros and cons of both methods, in particular, the readout method strategies being explored for the Multiwavelength Sub/millimeter Inductance Camera (MUSIC) to be commissioned at the CSO in 2010. As predicted theoretically and observed experimentally, the frequency responsivity is larger than the dissipation responsivity, by a factor of 2-4 under typical conditions. In the absence of any other noise contributions, it should be easier to overcome amplifier noise by simply using frequency readout. The resonators, however, exhibit excess frequency noise which has been ascribed to a surface distribution of two-level fluctuators sensitive to specific device geometries and fabrication techniques. Impressive dark noise performance has been achieved using modified resonator geometries employing interdigitated capacitors (IDCs). To date, our noise measurement and modeling efforts have assumed an onresonance readout, with the carrier power set well below the nonlinear regime. Several experimental indicators suggested to us that the optimal readout technique may in fact require a higher readout power, with the carrier tuned somewhat off resonance, and that a careful systematic study of the optimal readout conditions was needed. We will present the results of such a study, and discuss the optimum readout conditions as well as the performance that can be achieved relative to BLIP.", "doi": "10.1117/12.857866", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77410Q" }, { "id": "authors:2bmss-15n69", "collection": "authors", "collection_id": "2bmss-15n69", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161108-085104803", "type": "book_section", "title": "Optics for MUSIC: a new (sub)millimeter camera for the Caltech Submillimeter Observatory", "book_title": "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V", "author": [ { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Czakon", "given_name": "Nicole G.", "clpid": "Czakon-N-G" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Downes", "given_name": "Thomas P.", "clpid": "Downes-T-P" }, { "family_name": "Duan", "given_name": "Ran P.", "clpid": "Duan-R-P" }, { "family_name": "Gao", "given_name": "Jiansong", "clpid": "Gao-Jiansong" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "Matt I.", "clpid": "Hollister-M-I" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-H-G" }, { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "Maloney", "given_name": "Philip R.", "clpid": "Maloney-P-R" }, { "family_name": "Noroozian", "given_name": "Omid", "clpid": "Noroozian-O" }, { "family_name": "Nguyen", "given_name": "Hien T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Schlaerth", "given_name": "James A.", "clpid": "Schlaerth-J-A" }, { "family_name": "Siegel", "given_name": "Seth", "orcid": "0000-0003-2631-6217", "clpid": "Siegel-S-R" }, { "family_name": "Vaillancourt", "given_name": "John E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Vayonakis", "given_name": "Anastasios", "clpid": "Vayonakis-A" }, { "family_name": "Wilson", "given_name": "Philip R.", "clpid": "Wilson-P-R" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "We will present the design and implementation, along with calculations and some measurements of the performance, of the room-temperature and cryogenic optics for MUSIC, a new (sub)millimeter camera we are developing for the Caltech Submm Observatory (CSO). The design consists of two focusing elements in addition to the CSO primary and secondary mirrors: a warm off-axis elliptical mirror and a cryogenic (4K) lens. These optics will provide a 14 arcmin field of view that is diffraction limited in all four of the MUSIC observing bands (2.00, 1.33, 1.02, and 0.86 mm). A cold (4K) Lyot stop will be used to define the primary mirror illumination, which will be maximized while keeping spillover at the sub 1% level. The MUSIC focal plane will be populated with broadband phased antenna arrays that efficiently couple to factor of (see manuscript) 3 in bandwidth, and each pixel on the focal plane will be read out via a set of four lumped element filters that define the MUSIC observing bands (i.e., each pixel on the focal plane simultaneously observes in all four bands). Finally, a series of dielectric and metal-mesh low pass filters have been implemented to reduce the optical power load on the MUSIC cryogenic stages to a quasi-negligible level while maintaining good transmission in-band.", "doi": "10.1117/12.857324", "isbn": "978-0-81948-231-0", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2010-07-15", "pages": "Art. No. 77410W" }, { "id": "authors:908wd-k3s13", "collection": "authors", "collection_id": "908wd-k3s13", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100412-103141639", "type": "article", "title": "Dark Matter Search Results from the CDMS II Experiment", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Akerib", "given_name": "D. S.", "clpid": "Akerib-D-S" }, { "family_name": "Arrenberg", "given_name": "S.", "clpid": "Arrenberg-S" }, { "family_name": "Bailey", "given_name": "C. N.", "clpid": "Bailey-C-N" }, { "family_name": "Balakishiyeva", "given_name": "D.", "clpid": "Balakishiyeva-D" }, { "family_name": "Baudis", "given_name": "L.", "clpid": "Baudis-L" }, { "family_name": "Bauer", "given_name": "D. A.", "clpid": "Bauer-D-A" }, { "family_name": "Brink", "given_name": "P. L.", "clpid": "Brink-P-L" }, { "family_name": "Bruch", "given_name": "T.", "clpid": "Bruch-T" }, { "family_name": "Bunker", "given_name": "R.", "clpid": "Bunker-R" }, { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Caldwell", "given_name": "D. O.", "clpid": "Caldwell-D-O" }, { "family_name": "Cooley", "given_name": "J.", "clpid": "Cooley-J" }, { "family_name": "Cushman", "given_name": "P.", "clpid": "Cushman-P" }, { "family_name": "Daal", "given_name": "M.", "orcid": "0000-0002-1134-2116", "clpid": "Daal-M" }, { "family_name": "DeJongh", "given_name": "F.", "clpid": "DeJongh-F" }, { "family_name": "Dragowsky", "given_name": "M. R.", "clpid": "Dragowsky-M-R" }, { "family_name": "Duong", "given_name": "L.", "clpid": "Duong-L" }, { "family_name": "Fallows", "given_name": "S.", "clpid": "Fallows-S" }, { "family_name": "Figueroa-Feliciano", "given_name": "E.", "clpid": "Figueroa-Feliciano-E" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Fritts", "given_name": "M.", "clpid": "Fritts-M" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Grant", "given_name": "D. R.", "clpid": "Grant-D-R" }, { "family_name": "Hall", "given_name": "J.", "clpid": "Hall-J" }, { "family_name": "Hennings-Yeomans", "given_name": "R.", "clpid": "Hennings-Yeomans-R" }, { "family_name": "Hertel", "given_name": "S. A.", "clpid": "Hertel-S-A" }, { "family_name": "Holmgren", "given_name": "D.", "clpid": "Holmgren-D" }, { "family_name": "Hsu", "given_name": "L.", "clpid": "Hsu-L" }, { "family_name": "Huber", "given_name": "M. E.", "clpid": "Huber-M-E" }, { "family_name": "Kamaev", "given_name": "O.", "clpid": "Kamaev-O" }, { "family_name": "Kiveni", "given_name": "M.", "clpid": "Kiveni-M" }, { "family_name": "Kos", "given_name": "M.", "clpid": "Kos-M" }, { "family_name": "Leman", "given_name": "S. W.", "clpid": "Leman-S-W" }, { "family_name": "Mahapatra", "given_name": "R.", "clpid": "Mahapatra-R" }, { "family_name": "Mandic", "given_name": "V.", "clpid": "Mandic-V" }, { "family_name": "McCarthy", "given_name": "K. A.", "clpid": "McCarthy-K-A" }, { "family_name": "Mirabolfathi", "given_name": "N.", "clpid": "Mirabolfathi-N" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "Nelson", "given_name": "H.", "clpid": "Nelson-H" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Phipps", "given_name": "A.", "clpid": "Phipps-A" }, { "family_name": "Pyle", "given_name": "M.", "orcid": "0000-0002-3490-6754", "clpid": "Pyle-Matt" }, { "family_name": "Qiu", "given_name": "X.", "clpid": "Qiu-X" }, { "family_name": "Ramberg", "given_name": "E.", "clpid": "Ramberg-E" }, { "family_name": "Rau", "given_name": "W.", "clpid": "Rau-W" }, { "family_name": "Reisetter", "given_name": "A.", "clpid": "Reisetter-A" }, { "family_name": "Saab", "given_name": "T.", "clpid": "Saab-T" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Sander", "given_name": "J.", "clpid": "Sander-J" }, { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Seitz", "given_name": "D. N.", "clpid": "Seitz-D-N" }, { "family_name": "Serfass", "given_name": "B.", "clpid": "Serfass-B" }, { "family_name": "Sundqvist", "given_name": "K. M.", "clpid": "Sundqvist-K-M" }, { "family_name": "Tarka", "given_name": "M.", "clpid": "Tarka-M" }, { "family_name": "Wikus", "given_name": "P.", "clpid": "Wikus-P" }, { "family_name": "Yellin", "given_name": "S.", "clpid": "Yellin-S" }, { "family_name": "Yoo", "given_name": "J.", "clpid": "Yoo-J" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" }, { "family_name": "Zhang", "given_name": "J.", "clpid": "Zhang-J" } ], "abstract": "Astrophysical observations indicate that dark matter constitutes most of the mass in our universe, but its nature remains unknown. Over the past decade, the Cryogenic Dark Matter Search (CDMS II) experiment has provided world-leading sensitivity for the direct detection of weakly interacting massive particle (WIMP) dark matter. The final exposure of our low-temperature germanium particle detectors at the Soudan Underground Laboratory yielded two candidate events, with an expected background of 0.9 \u00b1 0.2 events. This is not statistically significant evidence for a WIMP signal. The combined CDMS II data place the strongest constraints on the WIMP-nucleon spin-independent scattering cross section for a wide range of WIMP masses and exclude new parameter space in inelastic dark matter models.", "doi": "10.1126/science.1186112", "issn": "0036-8075", "publisher": "American Association for the Advancement of Science", "publication": "Science", "publication_date": "2010-03-26", "series_number": "5973", "volume": "327", "issue": "5973", "pages": "1619-1621" }, { "id": "authors:z9wde-t8c75", "collection": "authors", "collection_id": "z9wde-t8c75", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100416-110656096", "type": "article", "title": "Analysis of the low-energy electron-recoil spectrum of the CDMS experiment", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Akerib", "given_name": "D. S.", "clpid": "Akerib-D-S" }, { "family_name": "Arrenberg", "given_name": "S.", "clpid": "Arrenberg-S" }, { "family_name": "Bailey", "given_name": "C. N.", "clpid": "Bailey-C-N" }, { "family_name": "Balakishiyeva", "given_name": "D.", "clpid": "Balakishiyeva-D" }, { "family_name": "Baudis", "given_name": "L.", "clpid": "Baudis-L" }, { "family_name": "Bauer", "given_name": "D. A.", "clpid": "Bauer-D-A" }, { "family_name": "Beaty", "given_name": "J.", "clpid": "Beaty-J" }, { "family_name": "Brink", "given_name": "P. L.", "clpid": "Brink-P-L" }, { "family_name": "Bruch", "given_name": "T.", "clpid": "Bruch-T" }, { "family_name": "Bunker", "given_name": "R.", "clpid": "Bunker-R" }, { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Caldwell", "given_name": "D. O.", "clpid": "Caldwell-D-O" }, { "family_name": "Cooley", "given_name": "J.", "clpid": "Cooley-J" }, { "family_name": "Cushman", "given_name": "P.", "clpid": "Cushman-P" }, { "family_name": "DeJongh", "given_name": "F.", "clpid": "DeJongh-F" }, { "family_name": "Dragowsky", "given_name": "M. R.", "clpid": "Dragowsky-M-R" }, { "family_name": "Duong", "given_name": "L.", "clpid": "Duong-L" }, { "family_name": "Figueroa-Feliciano", "given_name": "E.", "clpid": "Figueroa-Feliciano-E" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Fritts", "given_name": "M.", "clpid": "Fritts-M" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Grant", "given_name": "D. R.", "clpid": "Grant-D-R" }, { "family_name": "Hall", "given_name": "J.", "clpid": "Hall-J" }, { "family_name": "Hennings-Yeomans", "given_name": "R.", "clpid": "Hennings-Yeomans-R" }, { "family_name": "Hertel", "given_name": "S.", "clpid": "Hertel-S" }, { "family_name": "Holmgren", "given_name": "D.", "clpid": "Holmgren-D" }, { "family_name": "Hsu", "given_name": "L.", "clpid": "Hsu-L" }, { "family_name": "Huber", "given_name": "M. E.", "clpid": "Huber-M-E" }, { "family_name": "Kamaev", "given_name": "O.", "clpid": "Kamaev-O" }, { "family_name": "Kiveni", "given_name": "M.", "clpid": "Kiveni-M" }, { "family_name": "Kos", "given_name": "M.", "clpid": "Kos-M" }, { "family_name": "Leman", "given_name": "S. W.", "clpid": "Leman-S-W" }, { "family_name": "Mahapatra", "given_name": "R.", "clpid": "Mahapatra-R" }, { "family_name": "Mandic", "given_name": "V.", "clpid": "Mandic-V" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "McCarthy", "given_name": "K. A.", "clpid": "McCarthy-K-A" }, { "family_name": "Mirabolfathi", "given_name": "N.", "clpid": "Mirabolfathi-N" }, { "family_name": "Nelson", "given_name": "H.", "clpid": "Nelson-H" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Pyle", "given_name": "M.", "orcid": "0000-0002-3490-6754", "clpid": "Pyle-Matt" }, { "family_name": "Qiu", "given_name": "X.", "clpid": "Qiu-X" }, { "family_name": "Ramberg", "given_name": "E.", "clpid": "Ramberg-E" }, { "family_name": "Rau", "given_name": "W.", "clpid": "Rau-W" }, { "family_name": "Reisetter", "given_name": "A.", "clpid": "Reisetter-A" }, { "family_name": "Saab", "given_name": "T.", "clpid": "Saab-T" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Sander", "given_name": "J.", "clpid": "Sander-J" }, { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Seitz", "given_name": "D. N.", "clpid": "Seitz-D-N" }, { "family_name": "Serfass", "given_name": "B.", "clpid": "Serfass-B" }, { "family_name": "Sundqvist", "given_name": "K. M.", "clpid": "Sundqvist-K-M" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" }, { "family_name": "Wikus", "given_name": "P.", "clpid": "Wikus-P" }, { "family_name": "Yellin", "given_name": "S.", "clpid": "Yellin-S" }, { "family_name": "Yoo", "given_name": "J.", "clpid": "Yoo-J" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" }, { "literal": "CDMS Collaboration" } ], "abstract": "We report on the analysis of the low-energy electron-recoil spectrum from the CDMS II experiment using data with an exposure of 443.2 kg-days. The analysis provides details on the observed counting rate and possible background sources in the energy range of 2\u20138.5 keV. We find no significant excess of a peaked contribution to the total counting rate above the background model, and compare this observation to the recent DAMA results. In the framework of a conversion of a dark matter particle into electromagnetic energy, our 90% confidence level upper limit of 0.246\u2009\u2009events/kg/day at 3.15 keV is lower than the total rate above background observed by DAMA. In absence of any specific particle physics model to provide the scaling in cross section between NaI and Ge, we assume a Z2 scaling. With this assumption the observed rate in DAMA remains higher than the upper limit in CDMS. Under the conservative assumption that the modulation amplitude is 6% of the total rate we obtain upper limits on the modulation amplitude a factor of ~2 lower than observed by DAMA, constraining some possible interpretations of this modulation.", "doi": "10.1103/PhysRevD.81.042002", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2010-02-15", "series_number": "4", "volume": "81", "issue": "4", "pages": "Art. No. 042002" }, { "id": "authors:e7bb4-b4307", "collection": "authors", "collection_id": "e7bb4-b4307", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100119-142858967", "type": "article", "title": "Studies of Millimeter-wave Atmospheric Noise above Mauna Kea", "author": [ { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aguirre", "given_name": "J. E.", "orcid": "0000-0002-4810-666X", "clpid": "Aguirre-J-E" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Edgington", "given_name": "S. F.", "clpid": "Edgington-S-F" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Goldin", "given_name": "A.", "clpid": "Goldin-A-L" }, { "family_name": "Haig", "given_name": "D.", "clpid": "Haig-D" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Laurent", "given_name": "G. T.", "clpid": "Laurent-G-T" }, { "family_name": "Mauskopf", "given_name": "P. D.", "orcid": "0000-0001-6397-5516", "clpid": "Mauskopf-P-D" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Rossinot", "given_name": "P.", "clpid": "Rossinot-P" }, { "family_name": "Schlaerth", "given_name": "J.", "clpid": "Schlaerth-J" } ], "abstract": "

We report measurements of the fluctuations in atmospheric emission (atmospheric noise) above Mauna Kea recorded with Bolocam at 143 and 268 GHz from the Caltech Submillimeter Observatory. The 143 GHz data were collected during a 40 night observing run in late 2003, and the 268 GHz observations were made in early 2004 and early 2005 over a total of 60 nights. Below \u22430.5 Hz, the data time-streams are dominated by atmospheric noise in all observing conditions. The atmospheric noise data are consistent with a Kolmogorov–Taylor turbulence model for a thin wind-driven screen, and the median amplitude of the fluctuations is 280 mK2 rad−5/3 at 143 GHz and 4000 mK2 rad−5/3 at 268 GHz. Comparing our results with previous ACBAR data, we find that the normalization of the power spectrum of the atmospheric noise fluctuations is a factor of \u224380 larger above Mauna Kea than above the South Pole at millimeter wavelengths. Most of this difference is due to the fact that the atmosphere above the South Pole is much drier than the atmosphere above Mauna Kea. However, the atmosphere above the South Pole is slightly more stable as well: the fractional fluctuations in the column depth of precipitable water vapor are a factor of \u2243√2 smaller at the South Pole compared to Mauna Kea. Based on our atmospheric modeling, we developed several algorithms to remove the atmospheric noise, and the best results were achieved when we described the fluctuations using a low-order polynomial in detector position over the 8' field of view. However, even with these algorithms, we were not able to reach photon-background-limited instrument photometer performance at frequencies below \u22430.5 Hz in any observing conditions. We also observed an excess low-frequency noise that is highly correlated between detectors separated by \u2272(f/#)λ; this noise appears to be caused by atmospheric fluctuations, but we do not have an adequate model to explain its source. We hypothesize that the correlations arise from the classical coherence of the electromagnetic field across a distance of \u2243(f/#)λ on the focal plane.

", "doi": "10.1088/0004-637X/708/2/1674", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2010-01-10", "series_number": "2", "volume": "708", "issue": "2", "pages": "1674-1691" }, { "id": "authors:cast6-6kx22", "collection": "authors", "collection_id": "cast6-6kx22", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160512-101228514", "type": "book_section", "title": "The Cryogenic Dark Matter Search (CDMS) : Present Status and Future", "book_title": "Intersections of Particles and Nuclear Physics", "author": [ { "family_name": "Brink", "given_name": "P. L.", "clpid": "Brink-P-L" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" } ], "contributor": [ { "family_name": "Marshak", "given_name": "M. L.", "clpid": "Marshak-M-L" } ], "abstract": "The CDMS collaboration utilizes Ge detectors for their Weakly Interacting Massive Particle (WIMP) search at the Soudan mine, Minnesota. The final data run of CDMS II is complete and a detector upgrade for SuperCDMS has commenced. A SuperTower of five 1\u2010inch thick Ge crystals has been installed and undergoing commissioning. Its surface\u2010event rejection capability should allow SuperCDMS to continue to run background free for the next proposed phases: 15 kg Ge deployment at Soudan, and up to 150 kg Ge deployment at SNOLAB. Recent detector advances to allow a 1 tonne Ge experiment are also discussed.", "doi": "10.1063/1.3293795", "isbn": "978-0-7354-0723-7", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-17", "pages": "260-263" }, { "id": "authors:ccyy9-bgs16", "collection": "authors", "collection_id": "ccyy9-bgs16", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100929-111803852", "type": "book_section", "title": "Characterization of SuperCDMS 1-inch Ge Detectors", "book_title": "The Thirteenth International Workshop on Low Temperature Detectors - LTD 13", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" } ], "contributor": [ { "family_name": "Cabrera", "given_name": "Blas", "clpid": "Cabrera-B" }, { "family_name": "Miller", "given_name": "Aaron", "clpid": "Miller-A" }, { "family_name": "Young", "given_name": "Betty", "clpid": "Young-B" } ], "abstract": "The newly commissioned SuperCDMS Soudan experiment aims to search for WIMP dark matter with a sensitivity to cross sections of 5\u00d710^(\u221245)cm^2 and larger (90% CL upper limit). This goal is facilitated by a new set of germanium detectors, 2.5 times more massive than the ones used in the CDMS-II experiment, and with a different athermal phonon sensor layout that eliminates radial degeneracy in position reconstruction of high radius events. We present characterization data on these detectors, as well as improved techniques for correcting position-dependent variations in pulse shape across the detector. These improvements provide surface-event discrimination sufficient for a reach of 5\u00d710^(\u221245)cm^2.", "doi": "10.1063/1.3292428", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "New York", "publication_date": "2009-12-16", "pages": "659-662" }, { "id": "authors:gq3qs-jxf57", "collection": "authors", "collection_id": "gq3qs-jxf57", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160512-080624897", "type": "book_section", "title": "SuperCDMS Detector Readout Cryogenic Hardware", "book_title": "Low Temperature Detectors, LTD 13", "author": [ { "family_name": "Seitz", "given_name": "D. N.", "clpid": "Seitz-D-N" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W-IV" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" } ], "contributor": [ { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Miller", "given_name": "A.", "clpid": "Miller-A" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" } ], "abstract": "SuperCDMS employs 1\u2010inch thick germanium crystals operated below 50mK in a dilution cryostat. Each detector produces ionization and phonon signals. Ionization signals are amplified by JFETs operating at 150K within an assembly mounted on the 4K cryostat stage. These high impedance signals are carried to the FETs by superconducting \"vacuum coaxes\" which minimize thermal conductivity, stray capacitance, and microphonics. Transition edge sensors produce low\u2010impedance phonon signals, amplified by SQUID arrays mounted on a 600mK stage. Detectors are mounted in a six\u2010sided wiring configuration called a \"tower\", which carries signals from 40mK to 4K. A flex circuit 3 meters in length carries amplified signals for each detector from 4K to a vacuum bulkhead. We describe the methods used to support the detectors, wiring and amplifier elements at various thermal stages, minimizing electrical noise and thermal loads.", "doi": "10.1063/1.3292334", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-16", "pages": "282-285" }, { "id": "authors:emxgr-jhf19", "collection": "authors", "collection_id": "emxgr-jhf19", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160511-143815913", "type": "book_section", "title": "Bulk and Surface Charge Collection: CDMS Detector Performance and Design Implications", "book_title": "Low Temperature Detectors, LTD 13", "author": [ { "family_name": "Bailey", "given_name": "C. N.", "clpid": "Bailey-C-N" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" } ], "contributor": [ { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Miller", "given_name": "A.", "clpid": "Miller-A" }, { "family_name": "Young", "given_name": "B.", "clpid": "Young-B" } ], "abstract": "The Cryogenic Dark Matter Search (CDMS) searches for Weakly Interacting Massive Particles (WIMPs) with cryogenic germanium particle detectors. These detectors discriminate between nuclear\u2010recoil candidate and electron\u2010recoil background events by collecting both phonon and ionization energy from interactions in the crystal. Incomplete ionization collection results in the largest background in the CDMS detectors as this causes electron\u2010recoil background interactions to appear as false candidate events. Two primary causes of incomplete ionization collection are suface and bulk charge trapping. Recent work has been focused on reducing surface trapping through the modification of fabrication methods for future detectors. Analyzing data taken with test devices shows that hydrogen passivation of the amorphous silicon blocking layer does not reduce the effects of surface trapping. Other data shows that the iron\u2010ion implantation used to lower the critical temperature of the tungsten transition\u2010edge sensors increases surface trapping, causing a degradation of the ionization collection. Using selective implantation on future detectors may improve ionization collection for events near the phonon side detector surface. Bulk trapping is minimized by neutralizing ionized lattice impurities. Detector investigations at testing facilities and at the experimental site in Soudan, MN have provided methods to optimize the neutralization process and monitor running conditions to maintain maximal ionization collection.", "doi": "10.1063/1.3292423", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-16", "pages": "643-646" }, { "id": "authors:mcwzy-e3g39", "collection": "authors", "collection_id": "mcwzy-e3g39", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100928-102341883", "type": "book_section", "title": "Quasiparticle Trapping in Microwave Kinetic Inductance Strip Detectors", "book_title": "The Thirteenth International Workshop on Low Temperature Detectors - LTD 13", "author": [ { "family_name": "Moore", "given_name": "D. C.", "clpid": "Moore-D-C" }, { "family_name": "Mazin", "given_name": "B. A.", "clpid": "Mazin-B-A" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-B" }, { "family_name": "Gao", "given_name": "J.", "clpid": "Gao-J" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" }, { "family_name": "McHugh", "given_name": "S.", "clpid": "McHugh-S" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-P-K" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "Microwave Kinetic Inductance Detectors (MKIDs) are thin-film, superconducting resonators, which are attractive for making large detector arrays due to their natural frequency domain multiplexing at GHz frequencies. For X-ray to IR wavelengths, MKIDs can provide high-resolution energy and timing information for each incoming photon. By fabricating strip detectors consisting of a rectangular absorber coupled to MKIDs at each end, high quantum efficiency and spatial resolution can be obtained. A similar geometry is being pursued for phonon sensing in a WIMP dark matter detector. Various materials have been tested including tantalum, tin, and aluminum for the absorbing strip, and aluminum, titanium, and aluminum manganese for the MKID. Initial Ta/Al X-ray devices have shown energy resolutions as good as 62 eV at 6 keV. A Ta/Al UV strip detector with an energy resolution of 0.8 eV at 4.9 eV has been demonstrated, but we find the coupling of the MKIDs to the absorbers is unreliable for these thinner devices. We report on progress probing the thicknesses at which the absorber/MKID coupling begins to degrade by using a resonator to inject quasiparticles directly into the absorber. In order to eliminate the absorber/MKID interface, a modified design for implanted AlMn/Al UV strip detectors was developed, and results showing good transmission of quasiparticles from the absorber to MKID in these devices are presented.", "doi": "10.1063/1.3292307", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-16", "pages": "168-171" }, { "id": "authors:24qc1-5e403", "collection": "authors", "collection_id": "24qc1-5e403", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160511-152456545", "type": "book_section", "title": "SuperCDMS Detector Fabrication Advances", "book_title": "Low Temperature Detectors, LTD 13", "author": [ { "family_name": "Brink", "given_name": "P. L.", "clpid": "Brink-P-L" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" } ], "contributor": [ { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Miller", "given_name": "A.", "clpid": "Miller-A" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" } ], "abstract": "For its dark matter search the SuperCDMS collaboration has developed new Ge detectors using the same athermal phonon sensors and ionization measurement technology of CDMS II but with larger mass, superior sensor performance and increased fabrication efficiency. The improvements in fabrication are described, a comparison of CDMS II and SuperCDMS detector production yield is reported, and future scalability addressed.", "doi": "10.1063/1.3292427", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-16", "pages": "655-658" }, { "id": "authors:crs41-d2s48", "collection": "authors", "collection_id": "crs41-d2s48", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100928-135931816", "type": "book_section", "title": "Future Developments in Low Temperature Detectors for CMB and Submm Astronomy", "book_title": "Low temperature detectors LTD-13", "author": [ { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" } ], "contributor": [ { "family_name": "Cabrera", "given_name": "Blas", "clpid": "Cabrera-B" }, { "family_name": "Miller", "given_name": "Aaron", "clpid": "Miller-A" }, { "family_name": "Young", "given_name": "Betty", "clpid": "Young-B" } ], "abstract": "We summarize the wide range of current and upcoming developments in low temperature detectors for CMB and submillimeter astronomy. We discuss work in sensor development, photon coupling and filtering architectures, and polarimetry and how these tie to applications requirements.", "doi": "10.1063/1.3292454", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-16", "pages": "773-782" }, { "id": "authors:b6ner-gx705", "collection": "authors", "collection_id": "b6ner-gx705", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100929-111815131", "type": "book_section", "title": "Microwave Kinetic Inductance Detector (MKID) Camera Testing for Submillimeter Astronomy", "book_title": "Low temperature detectors LTD-13", "author": [ { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Vayonakis", "given_name": "A.", "clpid": "Vayonakis-A" }, { "family_name": "Schlaerth", "given_name": "J.", "clpid": "Schlaerth-J" }, { "family_name": "Hollister", "given_name": "M. I.", "clpid": "Hollister-M-I" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-P-K" }, { "family_name": "Gao", "given_name": "J.-S.", "clpid": "Gao-J-S" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Leduc", "given_name": "H.", "clpid": "LeDuc-H-G" }, { "family_name": "Maloney", "given_name": "P. R.", "clpid": "Maloney-P-R" }, { "family_name": "Mazin", "given_name": "B.", "clpid": "Mazin-B" }, { "family_name": "Noroozian", "given_name": "O.", "clpid": "Noroozian-O" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Vaillancourt", "given_name": "J. E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "Developing kilopixel focal planes for incoherent submm- and mm-wave detectors remains challenging due to either the large hardware overhead or the complexity of multiplexing standard detectors. Microwave kinetic inductance detectors (MKIDs) provide a efficient means to produce fully lithographic background-limited kilopixel focal planes. We are constructing an MKID-based camera for the Caltech Submillimeter Observatory with 576 spatial pixels each simultaneously sensitive in 4 bands at 230, 300, 350, and 400 GHz. The novelty of MKIDs has required us to develop new techniques for detector characterization. We have measured quasiparticle lifetimes and resonator Qs for detector bath temperatures between 200 mK and 400 mK. Equivalent lifetime measurements were made by coupling energy into the resonators either optically or by driving the third harmonic of the resonator. To determine optical loading, we use both lifetime and internal Q measurements, which range between 15,000 and 30,000 for our resonators. Spectral bandpass measurements confirm the placement of the 230 and 350 GHz bands. Additionally, beam maps measurements conform to expectations. The same device design has been characterized on both sapphire and silicon substrates, and for different detector geometries. We also report on the incorporation of new shielding to reduce detector sensitivity to local magnetic fields.", "doi": "10.1063/1.3292308", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-16", "pages": "172-175" }, { "id": "authors:xjtrk-09v48", "collection": "authors", "collection_id": "xjtrk-09v48", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160511-150321443", "type": "book_section", "title": "The Cryogenic Dark Matter Search (CDMS) experiment: Results, status and perspective", "book_title": "Low Temperature Detectors, LTD 13", "author": [ { "family_name": "Mirabolfathi", "given_name": "N.", "clpid": "Mirabolfathi-N" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" } ], "contributor": [ { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Miller", "given_name": "A.", "clpid": "Miller-A" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" } ], "abstract": "The Cryogenic Dark Matter Search experiment (CDMS) is using Phonon+Ionization detectors to search for Dark Matter in the form of Weakly Interactive Massive Particles (WIMPs). We report on new results from the operation of CDMS five \"towers\" at Soudan underground laboratory. With new and more massive detectors, SuperCDMS project has been started since March 2009. We report on the current status of SuperCDMS and its perspective.", "doi": "10.1063/1.3292418", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-16", "pages": "623-626" }, { "id": "authors:4ce4h-nfh26", "collection": "authors", "collection_id": "4ce4h-nfh26", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160511-122537355", "type": "book_section", "title": "Sensitivity Optimization of Millimeter/Submillimeter MKID Camera Pixel Device Design", "book_title": "Low Temperature Detectors, LTD 13", "author": [ { "family_name": "Schlaerth", "given_name": "J.", "clpid": "Schlaerth-J" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" }, { "family_name": "Vayonakis", "given_name": "A.", "clpid": "Vayonakis-A" }, { "family_name": "Gao", "given_name": "Js.", "clpid": "Gao-Js" }, { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Day", "given_name": "P.", "clpid": "Day-P-K" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Hollister", "given_name": "M.", "clpid": "Hollister-M" }, { "family_name": "LeDuc", "given_name": "H.", "clpid": "LeDuc-H-G" }, { "family_name": "Maloney", "given_name": "P.", "clpid": "Maloney-P" }, { "family_name": "Mazin", "given_name": "B.", "clpid": "Mazin-B" }, { "family_name": "Nguyen", "given_name": "H.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Vaillancourt", "given_name": "J.", "clpid": "Vaillancourt-J-E" } ], "contributor": [ { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Miller", "given_name": "A.", "clpid": "Miller-A" }, { "family_name": "Young", "given_name": "B.", "clpid": "Young-B" } ], "abstract": "We are using Microwave Kinetic Inductance Detectors in a sub/millimeter camera for the Caltech Submillimeter Observatory. These detectors are microwave resonators that rely on submillimeter and millimeter-wave photons to break Cooper pairs, changing the surface impedance. This changes the resonator frequency and quality factor, Q, and is measured by probe signals\nsent through a feedline coupled to the detectors. The camera will be divided into 16 independent readout tiles, each of which\nwill fit 144 resonators at different frequencies into 360 MHz of bandwidth. We discuss the effect of readout power and single\npixel frequency responsivity on the NEP of the detectors. Finally, we consider the mapping speeds of a full tile as a function\nof Q, which is controlled through the detector volume. A lower Q at fixed optical power implies greater responsivity, while\na higher Q decreases the collision probability - the likelihood that any two resonators will have close enough resonant frequencies for crosstalk to be unacceptably high. We find the optimal design based on these constraints, and the corresponding mapping speeds expected at the telescope.", "doi": "10.1063/1.3292310", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-16", "pages": "180-183" }, { "id": "authors:2yfc5-1ew16", "collection": "authors", "collection_id": "2yfc5-1ew16", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100928-102442082", "type": "book_section", "title": "Antenna-coupled TES Arrays For The BICEP2/Keck and SPIDER polarimeters", "book_title": "Low Temperature Detectors LTD 13", "author": [ { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Aikin", "given_name": "R. W.", "clpid": "Aikin-R-W" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Bonetti", "given_name": "J. A.", "clpid": "Bonetti-J-A" }, { "family_name": "Brevik", "given_name": "J. A.", "clpid": "Brevik-J-A" }, { "family_name": "Filippini", "given_name": "J. P.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Morford", "given_name": "T.", "clpid": "Morford-T-A" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W-IV" }, { "family_name": "Runyan", "given_name": "M.", "clpid": "Runyan-M" }, { "family_name": "Sudiwala", "given_name": "R.", "clpid": "Sudiwala-R-V" }, { "family_name": "Trangsrud", "given_name": "A.", "clpid": "Trangsrud-Amy-R" } ], "abstract": "The upcoming Cosmic Microwave Background (CMB) experiments BICEP2/Keck and SPIDER will be using planar arrays of polarization sensitive antenna-coupled TES bolometers, operating at frequencies between 96 GHz and 220 GHz. At 145 GHz each array consists of 64 polarimeters (128 TES sensors) and four of these arrays are assembled together to make a focal plane. The detector arrays are integrated with a time-domain SQUID multiplexer developed at NIST and read out using the Multi-Channel Electronics (MCE) developed at the University of British Columbia. We present our progress in characterizing focal plane arrays and SQUID multiplexed readout for BICEP2 and SPIDER, describing testing procedures and giving a summary of dark measurements results, as well as preliminary optical measurements", "doi": "10.1063/1.3292380", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "publication_date": "2009-12-16", "pages": "471-474" }, { "id": "authors:zhq16-pq803", "collection": "authors", "collection_id": "zhq16-pq803", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160511-134235094", "type": "book_section", "title": "The MKID Camera", "book_title": "Low Temperature Detectors LTD 13", "author": [ { "family_name": "Maloney", "given_name": "P. R.", "clpid": "Maloney-P-R" }, { "family_name": "Czakon", "given_name": "N. G.", "clpid": "Czakon-N-G" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-Peter-K" }, { "family_name": "Duan", "given_name": "R.", "clpid": "Duan-Ran-P" }, { "family_name": "Gao", "given_name": "J.", "clpid": "Gao-J" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hollister", "given_name": "M.", "clpid": "Hollister-M" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Mazin", "given_name": "B.", "clpid": "Mazin-B" }, { "family_name": "Noroozian", "given_name": "O.", "clpid": "Noroozian-O" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Schlaerth", "given_name": "J.", "clpid": "Schlaerth-J" }, { "family_name": "Vaillancourt", "given_name": "J. E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Vayonakis", "given_name": "A.", "clpid": "Vayonakis-A" }, { "family_name": "Wilson", "given_name": "P.", "clpid": "Wilson-P" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Miller", "given_name": "A.", "clpid": "Miller-A" }, { "family_name": "Young", "given_name": "B.", "clpid": "Young-B" } ], "abstract": "The MKID Camera project is a collaborative effort of Caltech, JPL, the University of Colorado, and UC Santa Barbara to develop a large\u2010format, multi\u2010color millimeter and submillimeter\u2010wavelength camera for astronomy using microwave kinetic inductance detectors (MKIDs). These are superconducting, micro\u2010resonators fabricated from thin aluminum and niobium films. We couple the MKIDs to multi\u2010slot antennas and measure the change in surface impedance produced by photon\u2010induced breaking of Cooper pairs. The readout is almost entirely at room temperature and can be highly multiplexed; in principle hundreds or even thousands of resonators could be read out on a single feedline. \n\nThe camera will have 576 spatial pixels that image simultaneously in four bands at 750, 850, 1100 and 1300 microns. It is scheduled for deployment at the Caltech Submillimeter Observatory in the summer of 2010. We present an overview of the camera design and readout and describe the current status of testing and fabrication.", "doi": "10.1063/1.3292309", "isbn": "978-0-7354-0751-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-12-16", "pages": "176-179" }, { "id": "authors:wmsbk-g3m87", "collection": "authors", "collection_id": "wmsbk-g3m87", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20091022-105715920", "type": "article", "title": "Search for Axions with the CDMS Experiment", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Akerib", "given_name": "D. S.", "clpid": "Akerib-D-S" }, { "family_name": "Arrenberg", "given_name": "S.", "clpid": "Arrenberg-S" }, { "family_name": "Bailey", "given_name": "C. N.", "clpid": "Bailey-C-N" }, { "family_name": "Balakishiyeva", "given_name": "D.", "clpid": "Balakishiyeva-D" }, { "family_name": "Baudis", "given_name": "L.", "clpid": "Baudis-L" }, { "family_name": "Bauer", "given_name": "D. A.", "clpid": "Bauer-D-A" }, { "family_name": "Beaty", "given_name": "J.", "clpid": "Beaty-J" }, { "family_name": "Brink", "given_name": "P. L.", "clpid": "Brink-P-L" }, { "family_name": "Bruch", "given_name": "T.", "clpid": "Bruch-T" }, { "family_name": "Bunker", "given_name": "R.", "clpid": "Bunker-R" }, { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Caldwell", "given_name": "D. O.", "clpid": "Caldwell-D-O" }, { "family_name": "Cooley", "given_name": "J.", "clpid": "Cooley-J" }, { "family_name": "Cushman", "given_name": "P.", "clpid": "Cushman-P" }, { "family_name": "DeJongh", "given_name": "F.", "clpid": "DeJongh-F" }, { "family_name": "Dragowsky", "given_name": "M. R.", "clpid": "Dragowsky-M-R" }, { "family_name": "Duong", "given_name": "L.", "clpid": "Duong-L" }, { "family_name": "Figueroa-Feliciano", "given_name": "E.", "clpid": "Figueroa-Feliciano-E" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Fritts", "given_name": "M.", "clpid": "Fritts-M" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Grant", "given_name": "D. R.", "clpid": "Grant-D-R" }, { "family_name": "Hall", "given_name": "J.", "clpid": "Hall-J" }, { "family_name": "Hennings-Yeomans", "given_name": "R.", "clpid": "Hennings-Yeomans-R" }, { "family_name": "Hertel", "given_name": "S.", "clpid": "Hertel-S" }, { "family_name": "Holmgren", "given_name": "D.", "clpid": "Holmgren-D" }, { "family_name": "Hsu", "given_name": "L.", "clpid": "Hsu-L" }, { "family_name": "Huber", "given_name": "M. E.", "clpid": "Huber-M-E" }, { "family_name": "Kamaev", "given_name": "O.", "clpid": "Kamaev-O" }, { "family_name": "Kiveni", "given_name": "M.", "clpid": "Kiveni-M" }, { "family_name": "Kos", "given_name": "M.", "clpid": "Kos-M" }, { "family_name": "Leman", "given_name": "S. W.", "clpid": "Leman-S-W" }, { "family_name": "Mahapatra", "given_name": "R.", "clpid": "Mahapatra-R" }, { "family_name": "Mandic", "given_name": "V.", "clpid": "Mandic-V" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "McCarthy", "given_name": "K. A.", "clpid": "McCarthy-K-A" }, { "family_name": "Mirabolfathi", "given_name": "N.", "clpid": "Mirabolfathi-N" }, { "family_name": "Nelson", "given_name": "H.", "clpid": "Nelson-H" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Pyle", "given_name": "M.", "orcid": "0000-0002-3490-6754", "clpid": "Pyle-Matt" }, { "family_name": "Qiu", "given_name": "X.", "clpid": "Qiu-X" }, { "family_name": "Ramberg", "given_name": "E.", "clpid": "Ramberg-E" }, { "family_name": "Rau", "given_name": "W.", "clpid": "Rau-W" }, { "family_name": "Reisetter", "given_name": "A.", "clpid": "Reisetter-A" }, { "family_name": "Saab", "given_name": "T.", "clpid": "Saab-T" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Sander", "given_name": "J.", "clpid": "Sander-J" }, { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Seitz", "given_name": "D. N.", "clpid": "Seitz-D-N" }, { "family_name": "Serfass", "given_name": "B.", "clpid": "Serfass-B" }, { "family_name": "Sundqvist", "given_name": "K. M.", "clpid": "Sundqvist-K-M" }, { "family_name": "Tarka", "given_name": "M.", "clpid": "Tarka-M" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" }, { "family_name": "Yellin", "given_name": "S.", "clpid": "Yellin-S" }, { "family_name": "Yoo", "given_name": "J.", "clpid": "Yoo-J" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" }, { "literal": "CDMS Collaboration" } ], "abstract": "We report on the first axion search results from the Cryogenic Dark Matter Search (CDMS) experiment at the Soudan Underground Laboratory. An energy threshold of 2 keV for electron-recoil events allows a search for possible solar axion conversion into photons or local galactic axion conversion into electrons in the germanium crystal detectors. The solar axion search sets an upper limit on the Primakov coupling g_(a\u03b3\u03b3) of 2.4\u00d710^(-9) GeV^(-1) at the 95% confidence level for an axion mass less than 0.1 keV/c^2. This limit benefits from the first precise measurement of the absolute crystal plane orientations in this type of experiment. The galactic axion search analysis sets a world-leading experimental upper limit on the axioelectric coupling g_(ae[overbar]e) of 1.4\u00d710^(-12) at the 90% confidence level for an axion mass of 2.5 keV/c^2.", "doi": "10.1103/PhysRevLett.103.141802", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2009-10-02", "series_number": "14", "volume": "103", "issue": "14", "pages": "Art. No. 141802" }, { "id": "authors:j00g8-c9f20", "collection": "authors", "collection_id": "j00g8-c9f20", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20090808-142502556", "type": "article", "title": "Millimeter-Wave Lumped Element Superconducting Bandpass Filters for Multi-Color Imaging", "author": [ { "family_name": "Kumar", "given_name": "Shwetank", "clpid": "Kumar-Shwetank" }, { "family_name": "Vayonakis", "given_name": "Anastasios", "clpid": "Vayonakis-A" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-H-G" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "The opacity due to water vapor in the Earth's atmosphere obscures portions of the sub-THz spectrum (mm/sub-mm wavelengths) to ground based astronomical observation. For maximum sensitivity, instruments operating at these wavelengths must be designed to have spectral responses that match the available windows in the atmospheric transmission that occur in between the strong water absorption lines. Traditionally, the spectral response of mm/sub-mm instruments has been set using optical, metal-mesh bandpass filters [1]. An alternative method for defining the passbands, available when using superconducting detectors coupled with planar antennas, is to use on-chip, superconducting filters [2]. This paper presents the design and testing of superconducting, lumped element, on-chip bandpass filters (BPFs), placed inline with the microstrip connecting the antenna and the detector, covering the frequency range from 209\u2013416 GHz. Four filters were designed with pass bands 209\u2013274 GHz, 265\u2013315 GHz, 335\u2013361 GHz and 397\u2013416 GHz corresponding to the atmospheric transmission windows. Fourier transform spectroscopy was used to verify that the spectral response of the BPFs is well predicted by the computer simulations. Two-color operation of the pixels was demonstrated by connecting two detectors to a single broadband antenna through two BPFs. Scalability of the design to multiple (four) colors is discussed.", "doi": "10.1109/TASC.2009.2017884", "issn": "1051-8223", "publisher": "IEEE", "publication": "IEEE Transactions on Applied Superconductivity", "publication_date": "2009-06", "series_number": "3, Par", "volume": "19", "issue": "3, Par", "pages": "924-929" }, { "id": "authors:h58za-bjv95", "collection": "authors", "collection_id": "h58za-bjv95", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100914-082739428", "type": "book_section", "title": "Sunyaev-Zeldovich Effect Studies of Galaxy Clusters with Bolocam (and Future Instrumentation)", "book_title": "Submillimeter astrophysics and technology : a symposium honoring Thomas G. Phillips", "author": [ { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Ameglio", "given_name": "Silvia", "clpid": "Ameglio-Silvia" }, { "family_name": "Pierpaoli", "given_name": "Elena", "orcid": "0000-0002-7957-8993", "clpid": "Pierpaoli-Elena" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" } ], "contributor": [ { "family_name": "Lis", "given_name": "D. C.", "clpid": "Lis-D-C" }, { "family_name": "Vaillancourt", "given_name": "J. E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Goldsmith", "given_name": "P. F.", "clpid": "Goldsmith-P-F" }, { "family_name": "Bell", "given_name": "T. A.", "clpid": "Bell-T-A" }, { "family_name": "Scoville", "given_name": "N. Z.", "clpid": "Scoville-N-Z" }, { "family_name": "Zmuidzinas", "given_name": "J.", "clpid": "Zmuidzinas-J" } ], "abstract": "Galaxy clusters are excellent laboratories for studying the astrophysics of gravitational collapse and the non-self-similar processes that can affect it. A number of different techniques allow us to study the distribution of the consituents of galaxy clusters. The thermal Sunyaev-Zeldovich effect measures the line-of-sight integral of the the pressure in the ICM plasma. Comparison to and combination with other probes enables a variety of studies of the ICM and of clusters: scaling relations, radial profiles, tests of hydrostatic equilibrium, etc. We report on the status of our program to image clusters in the thermal Sunyaev-Zeldovich effect at 150 GHz using Bolocam and perform such tests. We also describe the upcoming MKIDCam long-wavelength multi-color facility camera for the CSO, which will provide new capabilities in thermal Sunyaev-Zeldovich effect imaging. We comment on the role Tom Phillips and the CSO have played in facilitating the development of mm-wave SZ observations.", "isbn": "978-1-58381-714-8", "publisher": "Astronomical Society of the Pacific", "place_of_publication": "San Francisco, CA", "publication_date": "2009-02", "pages": "311-324" }, { "id": "authors:9y6zr-qw224", "collection": "authors", "collection_id": "9y6zr-qw224", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:SAYapj09", "type": "article", "title": "A Search for Cosmic Microwave Background Anisotropies on Arcminute Scales with Bolocam", "author": [ { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Rossinot", "given_name": "P.", "clpid": "Rossinot-P" }, { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aguirre", "given_name": "J. E.", "orcid": "0000-0002-4810-666X", "clpid": "Aguirre-J-E" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Edgington", "given_name": "S. F.", "clpid": "Edgington-S-F" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Goldin", "given_name": "A.", "clpid": "Goldin-A-L" }, { "family_name": "Haig", "given_name": "D.", "clpid": "Haig-D" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Laurent", "given_name": "G. T.", "clpid": "Laurent-G-T" }, { "family_name": "Mauskopf", "given_name": "P. D.", "orcid": "0000-0001-6397-5516", "clpid": "Mauskopf-P-D" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" } ], "abstract": "

We have surveyed two science fields totaling 1 deg2 with Bolocam at 2.1 mm to search for secondary Cosmic Microwave Background (CMB) anisotropies caused by the Sunyaev-Zel'dovich effect (SZE). The fields are in the Lynx and Subaru/XMM SDS1 fields. Our survey is sensitive to angular scales with an effective angular multipole of \u2113eff = 5700 with FWHM\u2113 = 2800 and has an angular resolution of 60 arcsec FWHM. Our data provide no evidence for anisotropy. We are able to constrain the level of total astronomical anisotropy, modeled as a flat-band power in C_\u2113, with most frequent 68%, 90%, and 95% CL upper limits of 590, 760, and 830 μK2CMB. We statistically subtract the known contribution from primary CMB anisotropy, including cosmic variance, to obtain constraints on the SZE anisotropy contribution. Now including flux calibration uncertainty, our most frequent 68%, 90%, and 95% CL upper limits on a flat-band power in C_\u2113 are 690, 960, and 1000 μK2CMB. When we instead employ the analytical spectrum suggested by Komatsu and Seljack in 2002, and account for the non-Gaussianity of the SZE anisotropy signal, we obtain upper limits on the average amplitude of their spectrum weighted by our transfer function of 790, 1060, and 1080 μK2CMB. We obtain a 90% CL upper limit on σ8, which normalizes the power spectrum of density fluctuations, of 1.57. These are the first constraints on anisotropy and σ8 from survey data at these angular scales at frequencies near 150 GHz.

", "doi": "10.1088/0004-637X/690/2/1597", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2009-01-10", "series_number": "2", "volume": "690", "issue": "2", "pages": "1597-1620" }, { "id": "authors:ddytf-4ak37", "collection": "authors", "collection_id": "ddytf-4ak37", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:AHMprl09", "type": "article", "title": "Search for weakly interacting massive particles with the first five-tower data from the cryogenic dark matter search at the Soudan underground laboratory", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Akerib", "given_name": "D. S.", "clpid": "Akerib-D-S" }, { "family_name": "Arrenberg", "given_name": "S.", "clpid": "Arrenberg-S" }, { "family_name": "Attisha", "given_name": "M. J.", "clpid": "Attisha-M-J" }, { "family_name": "Bailey", "given_name": "C. N.", "clpid": "Bailey-C-N" }, { "family_name": "Baudis", "given_name": "L.", "clpid": "Baudis-L" }, { "family_name": "Bauer", "given_name": "D. A.", "clpid": "Bauer-D-A" }, { "family_name": "Beaty", "given_name": "J.", "clpid": "Beaty-J" }, { "family_name": "Brink", "given_name": "P. L.", "clpid": "Brink-P-L" }, { "family_name": "Bruch", "given_name": "T.", "clpid": "Bruch-T" }, { "family_name": "Bunker", "given_name": "R.", "clpid": "Bunker-R" }, { "family_name": "Burke", "given_name": "S.", "clpid": "Burke-S" }, { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Caldwell", "given_name": "D. O.", "clpid": "Caldwell-D-O" }, { "family_name": "Cooley", "given_name": "J.", "clpid": "Cooley-J" }, { "family_name": "Cushman", "given_name": "P.", "clpid": "Cushman-P" }, { "family_name": "DeJongh", "given_name": "F.", "clpid": "DeJongh-F" }, { "family_name": "Dragowsky", "given_name": "M. R.", "clpid": "Dragowsky-M-R" }, { "family_name": "Duong", "given_name": "L.", "clpid": "Duong-L" }, { "family_name": "Emes", "given_name": "J.", "clpid": "Emes-J" }, { "family_name": "Figueroa-Feliciano", "given_name": "E.", "clpid": "Figueroa-Feliciano-E" }, { "family_name": "Filippini", "given_name": "J.", "orcid": "0000-0001-8217-6832", "clpid": "Filippini-J-P" }, { "family_name": "Fritts", "given_name": "M.", "clpid": "Fritts-M" }, { "family_name": "Gaitskell", "given_name": "R. J.", "clpid": "Gaitskell-R-J" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Grant", "given_name": "D. R.", "clpid": "Grant-D-R" }, { "family_name": "Hall", "given_name": "J.", "clpid": "Hall-J" }, { "family_name": "Hennings-Yeomans", "given_name": "R.", "clpid": "Hennings-Yeomans-R" }, { "family_name": "Hertel", "given_name": "S.", "clpid": "Hertel-S" }, { "family_name": "Holmgren", "given_name": "D.", "clpid": "Holmgren-D" }, { "family_name": "Huber", "given_name": "M. E.", "clpid": "Huber-M-E" }, { "family_name": "Mahapatra", "given_name": "R.", "clpid": "Mahapatra-R" }, { "family_name": "Mandic", "given_name": "V.", "clpid": "Mandic-V" }, { "family_name": "McCarthy", "given_name": "K. A.", "clpid": "McCarthy-K-A" }, { "family_name": "Mirabolfathi", "given_name": "N.", "clpid": "Mirabolfathi-N" }, { "family_name": "Nelson", "given_name": "H.", "clpid": "Nelson-H" }, { "family_name": "Novak", "given_name": "L.", "clpid": "Novak-L" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Pyle", "given_name": "M.", "orcid": "0000-0002-3490-6754", "clpid": "Pyle-Matt" }, { "family_name": "Qiu", "given_name": "X.", "clpid": "Qiu-X" }, { "family_name": "Ramberg", "given_name": "E.", "clpid": "Ramberg-E" }, { "family_name": "Rau", "given_name": "W.", "clpid": "Rau-W" }, { "family_name": "Reisetter", "given_name": "A.", "clpid": "Reisetter-A" }, { "family_name": "Saab", "given_name": "T.", "clpid": "Saab-T" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Sander", "given_name": "J.", "clpid": "Sander-J" }, { "family_name": "Schmitt", "given_name": "R.", "clpid": "Schmitt-R" }, { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Seitz", "given_name": "D. N.", "clpid": "Seitz-D-N" }, { "family_name": "Serfass", "given_name": "B.", "clpid": "Serfass-B" }, { "family_name": "Sirois", "given_name": "A.", "clpid": "Sirois-A" }, { "family_name": "Sundqvist", "given_name": "K. M.", "clpid": "Sundqvist-K-M" }, { "family_name": "Tarka", "given_name": "M.", "clpid": "Tarka-M" }, { "family_name": "Tomada", "given_name": "A.", "clpid": "Tomada-A" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" }, { "family_name": "Yellin", "given_name": "S.", "clpid": "Yellin-S" }, { "family_name": "Yoo", "given_name": "J.", "clpid": "Yoo-J" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" } ], "abstract": "We report results from the Cryogenic Dark Matter Search at the Soudan Underground Laboratory (CDMS II) featuring the full complement of 30 detectors. A blind analysis of data taken between October 2006 and July 2007 sets an upper limit on the weakly interacting massive particle (WIMP) nucleon spin-independent cross section of 6.6 x 10^(-44) cm^2 (4.6 x 10^(-44) cm^2 when combined with previous CDMS II data) at the 90% confidence level for a WIMP mass of 60 GeV/c^2. This achieves the best sensitivity for dark matter WIMPs with masses above 44 GeV/c^2, and significantly restricts the parameter space for some favored supersymmetric models.", "doi": "10.1103/PhysRevLett.102.011301", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2009-01-05", "series_number": "1", "volume": "102", "issue": "1", "pages": "Art. No. 011301" }, { "id": "authors:xx8ca-ywd87", "collection": "authors", "collection_id": "xx8ca-ywd87", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20090524-204222732", "type": "article", "title": "Spider optimization: probing the systematics of a large-scale B-mode experiment", "author": [ { "family_name": "MacTavish", "given_name": "C. J.", "clpid": "MacTavish-C-J" }, { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Battistelli", "given_name": "E. S.", "orcid": "0000-0001-5210-7625", "clpid": "Battistelli-E-S" }, { "family_name": "Benton", "given_name": "S.", "clpid": "Benton-S" }, { "family_name": "Bihary", "given_name": "R.", "clpid": "Bihary-R" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Bond", "given_name": "J. R.", "orcid": "0000-0003-2358-9949", "clpid": "Bond-J-R" }, { "family_name": "Brevik", "given_name": "J.", "clpid": "Brevik-J" }, { "family_name": "Bryan", "given_name": "S.", "clpid": "Bryan-S" }, { "family_name": "Contaldi", "given_name": "C. R.", "clpid": "Contaldi-C-R" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Dor\u00e9", "given_name": "O.", "orcid": "0000-0001-7432-2932", "clpid": "Dor\u00e9-O" }, { "family_name": "Fissel", "given_name": "L.", "orcid": "0000-0002-3242-8154", "clpid": "Fissel-Laura-M" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Halpern", "given_name": "M.", "orcid": "0000-0002-1760-0868", "clpid": "Halpern-M" }, { "family_name": "Hilton", "given_name": "G.", "clpid": "Hilton-G" }, { "family_name": "Holmes", "given_name": "W.", "clpid": "Holmes-W" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Irwin", "given_name": "K.", "clpid": "Irwin-K" }, { "family_name": "Jones", "given_name": "W. C.", "clpid": "Jones-W-C" }, { "family_name": "Kuo", "given_name": "C. L.", "clpid": "Kuo-Chia-Lam" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Lawrie", "given_name": "C.", "clpid": "Lawrie-C" }, { "family_name": "Martin", "given_name": "T. G.", "clpid": "Martin-T-G" }, { "family_name": "Mason", "given_name": "P.", "clpid": "Mason-P" }, { "family_name": "Montroy", "given_name": "T. E.", "clpid": "Montroy-T-E" }, { "family_name": "Netterfield", "given_name": "C. B.", "clpid": "Netterfield-C-B" }, { "family_name": "Riley", "given_name": "D.", "clpid": "Riley-D" }, { "family_name": "Ruhl", "given_name": "J. E.", "clpid": "Ruhl-J-E" }, { "family_name": "Runyan", "given_name": "M.", "clpid": "Runyan-M" }, { "family_name": "Trangsrud", "given_name": "A.", "clpid": "Trangsrud-Amy-R" }, { "family_name": "Tucker", "given_name": "C.", "clpid": "Tucker-C" }, { "family_name": "Turner", "given_name": "A.", "clpid": "Turner-A" }, { "family_name": "Viero", "given_name": "M.", "clpid": "Viero-M-P" }, { "family_name": "Wiebe", "given_name": "D.", "clpid": "Wiebe-D" } ], "abstract": "Spider is a long-duration, balloon-borne polarimeter designed to measure large-scale cosmic microwave background (CMB) polarization with very high sensitivity and control of systematics. The instrument will map over half the sky with degree angular resolution in the I, Q, and U Stokes parameters in four frequency bands from 96 to 275 GHz. Spider's ultimate goal is to detect the primordial gravity-wave signal imprinted on the CMB B-mode polarization. One of the challenges in achieving this goal is the minimization of the contamination of B-modes by systematic effects. This paper explores a number of instrument systematics and observing strategies in order to optimize B-mode sensitivity. This is done by injecting realistic-amplitude, time-varying systematics into a set of simulated time streams. Tests of the impact of detector noise characteristics, pointing jitter, payload pendulations, polarization angle offsets, beam systematics, and receiver gain drifts are shown. Spider's default observing strategy is to spin continuously in azimuth, with polarization modulation achieved by either a rapidly spinning half-wave plate or a rapidly spinning gondola and a slowly stepped half-wave plate. Although the latter is more susceptible to systematics, the results shown here indicate that either mode of operation can be used by Spider.", "doi": "10.1086/592732", "issn": "0004-637X", "publisher": "American Astronomical Society", "publication": "Astrophysical Journal", "publication_date": "2008-12-20", "series_number": "2", "volume": "689", "issue": "2", "pages": "655-665" }, { "id": "authors:c9jsf-bav61", "collection": "authors", "collection_id": "c9jsf-bav61", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180717-152432620", "type": "book_section", "title": "BICEP2/SPUD: searching for inflation with degree scale polarimetry from the South Pole", "book_title": "Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV", "author": [ { "family_name": "Nguyen", "given_name": "Hien Trong", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Kovac", "given_name": "John", "clpid": "Kovac-J-M" }, { "family_name": "Ade", "given_name": "Pete", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aikin", "given_name": "Randol", "clpid": "Aikin-R-W" }, { "family_name": "Benton", "given_name": "Steve", "clpid": "Benton-S-J" }, { "family_name": "Bock", "given_name": "Jamie", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Brevik", "given_name": "Justus", "clpid": "Brevik-J-A" }, { "family_name": "Carlstrom", "given_name": "John", "orcid": "0000-0002-2044-7665", "clpid": "Carlstrom-J-E" }, { "family_name": "Dowell", "given_name": "Darren", "clpid": "Dowell-D" }, { "family_name": "Duband", "given_name": "Lionel", "clpid": "Duband-L" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Halpern", "given_name": "Mark", "orcid": "0000-0002-1760-0868", "clpid": "Halpern-M" }, { "family_name": "Hasselfield", "given_name": "Matthew", "clpid": "Hasselfield-M" }, { "family_name": "Irwin", "given_name": "Kent", "clpid": "Irwin-K-D" }, { "family_name": "Jones", "given_name": "William", "clpid": "Jones-W" }, { "family_name": "Kaufman", "given_name": "Jonathan", "clpid": "Kaufman-J" }, { "family_name": "Keating", "given_name": "Brian", "clpid": "Keating-B-G" }, { "family_name": "Kuo", "given_name": "Chao-Lin", "clpid": "Kuo-Chao-Lin" }, { "family_name": "Lange", "given_name": "Andrew", "clpid": "Lange-A-E" }, { "family_name": "Matsumura", "given_name": "Tomotake", "clpid": "Matsumura-Tomotake" }, { "family_name": "Netterfield", "given_name": "Barth", "clpid": "Netterfield-C-B" }, { "family_name": "Pryke", "given_name": "Clem", "clpid": "Pryke-C" }, { "family_name": "Ruhl", "given_name": "John", "clpid": "Ruhl-J-E" }, { "family_name": "Sheehy", "given_name": "Chris", "clpid": "Sheehy-C-D" }, { "family_name": "Sudiwala", "given_name": "Rashmi", "clpid": "Sudiwala-R-V" } ], "contributor": [ { "family_name": "Duncan", "given_name": "William D.", "clpid": "Duncan-W-D" }, { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Withington", "given_name": "Stafford", "clpid": "Withington-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "BICEP2/SPUD is the new powerful upgrade of the existing BICEP1 experiment, a bolometric receiver to study the polarization of the cosmic microwave background radiation, which has been in operation at the South Pole since January 2006. BICEP2 will provide an improvement up to 10 times mapping speed at 150 GHz compared to BICEP1, using the same BICEP telescope mount. SPUD, a series of compact, mechanically-cooled receivers deployed on the DASI mount at the Pole, will provide similar mapping speed in to BICEP2 in three bands, 100, 150, and 220 GHz. The new system will use large TES focal plane arrays to provide unprecedented sensitivity and excellent control of foreground contamination.", "doi": "10.1117/12.787997", "isbn": "9780819472304", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2008-07-21", "pages": "Art. No. 70201F" }, { "id": "authors:hy1p1-d6r31", "collection": "authors", "collection_id": "hy1p1-d6r31", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190318-142820927", "type": "book_section", "title": "Studies of atmospheric noise on Mauna Kea at 143 GHz with Bolocam", "book_title": "Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV", "author": [ { "family_name": "Sayers", "given_name": "J.", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aguirre", "given_name": "J. E.", "orcid": "0000-0002-4810-666X", "clpid": "Aguirre-J-E" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Edgington", "given_name": "S. F.", "clpid": "Edgington-S-F" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Goldin", "given_name": "A.", "clpid": "Goldin-A-L" }, { "family_name": "Haig", "given_name": "D.", "clpid": "Haig-D" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Laurent", "given_name": "G. T.", "clpid": "Laurent-G-T" }, { "family_name": "Mauskopf", "given_name": "P. D.", "orcid": "0000-0001-6397-5516", "clpid": "Mauskopf-P-D" }, { "family_name": "Nguyen", "given_name": "H. T.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Rossinot", "given_name": "P.", "clpid": "Rossinot-P" } ], "contributor": [ { "family_name": "Duncan", "given_name": "William D.", "clpid": "Duncan-W-D" }, { "family_name": "Holland,", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Withington", "given_name": "Stafford", "clpid": "Withington-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "We report measurements of the fluctuations in atmospheric emission (atmospheric noise) above Mauna Kea recorded with Bolocam at 143 GHz. These data were collected in November and December of 2003 with Bolocam mounted on the Caltech Submillimeter Observatory (CSO), and span approximately 40 nights. Below \u2243 0.5 Hz, the data time-streams are dominated by the f-\u03b4 atmospheric noise in all observing conditions. We were able to successfully model the atmospheric fluctuations using a Kolmogorov-Taylor turbulence model for a thin wind-driven screen in approximately half of our data. Based on this modeling, we developed several algorithms to remove the atmospheric noise, and the best results were achieved when we described the fluctuations using a low-order polynomial in detector position over the 8 arcminute focal plane. However, even with these algorithms, we were not able to reach photon-background-limited instrument photometer (BLIP) performance at frequencies below \u2243 0.5 Hz in any observing conditions. Therefore, we conclude that BLIP performance is not possible from the CSO below \u2243 0.5 Hz for broadband 150 GHz receivers with subtraction of a spatial atmospheric template on scales of several arcminutes.", "doi": "10.1117/12.790029", "isbn": "9780819472304", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2008-07-21", "pages": "Art. No. 70201Q" }, { "id": "authors:fkr4f-nvb66", "collection": "authors", "collection_id": "fkr4f-nvb66", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180717-152838818", "type": "book_section", "title": "Antenna-coupled TES bolometer arrays for CMB polarimetry", "book_title": "Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV", "author": [ { "family_name": "Kuo", "given_name": "C. L.", "clpid": "Kuo-Chia-Lam" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Bonetti", "given_name": "J. A.", "clpid": "Bonetti-J-A" }, { "family_name": "Brevik", "given_name": "J.", "clpid": "Brevik-J-A" }, { "family_name": "Chattopadhyay", "given_name": "G.", "orcid": "0000-0001-7942-5025", "clpid": "Chattopadhyay-G" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-P-K" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Kenyon", "given_name": "M.", "clpid": "Kenyon-M" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Nguyen", "given_name": "H.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Ogburn", "given_name": "R. W.", "clpid": "Ogburn-R-W" }, { "family_name": "Orlando", "given_name": "A.", "clpid": "Orlando-A" }, { "family_name": "Transgrud", "given_name": "A.", "clpid": "Transgrud-Amy-R" }, { "family_name": "Turner", "given_name": "A.", "clpid": "Turner-A" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Duncan", "given_name": "William D.", "clpid": "Duncan-W-D" }, { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Withington", "given_name": "Stafford", "clpid": "Withington-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "We describe the design and performance of polarization selective antenna-coupled TES arrays that will be used in several upcoming Cosmic Microwave Background (CMB) experiments: SPIDER, BICEP-2/SPUD. The fully lithographic polarimeter arrays utilize planar phased-antennas for collimation (F/4 beam) and microstrip filters for band definition (25% bandwidth). These devices demonstrate high optical efficiency, excellent beam shapes, and well-defined spectral bands. The dual-polarization antennas provide well-matched beams and low cross polarization response, both important for high-fidelity polarization measurements. These devices have so far been developed for the 100 GHz and 150 GHz bands, two premier millimeter-wave atmospheric windows for CMB observations. In the near future, the flexible microstrip-coupled architecture can provide photon noise-limited detection for the entire frequency range of the CMBPOL mission. This paper is a summary of the progress we have made since the 2006 SPIE meeting in Orlando, FL.", "doi": "10.1117/12.788588", "isbn": "9780819472304", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2008-07-19", "pages": "Art. No. 70201I" }, { "id": "authors:cvjfv-kht52", "collection": "authors", "collection_id": "cvjfv-kht52", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180717-152917469", "type": "book_section", "title": "A microwave kinetic inductance camera for sub/millimeter astrophysics", "book_title": "Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV", "author": [ { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Ferry", "given_name": "Matt", "clpid": "Ferry-M" }, { "family_name": "Gao", "given_name": "Jiansong", "clpid": "Gao-Jiansong" }, { "family_name": "Golwala", "given_name": "Sunil R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Kumar", "given_name": "Shwetank", "clpid": "Kumar-Shwetank" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-H-G" }, { "family_name": "Maloney", "given_name": "Philip R.", "clpid": "Maloney-P-R" }, { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "Nguyen", "given_name": "Hien", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Noroozian", "given_name": "Omid", "clpid": "Noroozian-O" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Schlaerth", "given_name": "James", "clpid": "Schlaerth-J-A" }, { "family_name": "Vaillancourt", "given_name": "John E.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Vayokanis", "given_name": "Anastasios", "clpid": "Vayokanis-A" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Duncan", "given_name": "William D.", "clpid": "Duncan-W-D" }, { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Withington", "given_name": "Stafford", "clpid": "Withington-S" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" } ], "abstract": "The MKID Camera is a millimeter/submillimeter instrument being built for astronomical observations from the Caltech Submillimeter Observatory. It utilizes microwave kinetic inductance detectors, which are rapidly achieving near-BLIP sensitivity for ground-based observations, and a software-defined radio readout technique for elegant multiplexing of a large number of detectors. The Camera will have 592 pixels distributed over 16 tiles in the focal plane, with four colors per pixel matched to the 750 \u03bcm, 850 \u03bcm, and 1.0 - 1.5 mm (split in two) atmospheric transmission windows. As a precursor to building the full-up camera and to enable ongoing detector testing, we have built a DemoCam comprised of a 16-pixel MKID array with which we have made preliminary astronomical observations. These observations demonstrate the viability of MKIDs for submillimeter astronomy, provide insight into systematic design issues that must be considered for MKID-based instruments, and they are the first astronomical observations with antenna-coupled superconducting detectors. In this paper, we describe the basic systems and specifications of the MKID Camera, we describe our DemoCam observations, and we comment on the status of submillimeter MKID sensitivities.", "doi": "10.1117/12.790050", "isbn": "9780819472304", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2008-07-18", "pages": "Art. No. 70200B" }, { "id": "authors:p79xp-2e929", "collection": "authors", "collection_id": "p79xp-2e929", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20090423-201108516", "type": "article", "title": "The AzTEC mm-wavelength camera", "author": [ { "family_name": "Wilson", "given_name": "G. W.", "clpid": "Wilson-G-W" }, { "family_name": "Austermann", "given_name": "J. E.", "clpid": "Austermann-J-E" }, { "family_name": "Perera", "given_name": "T. A.", "clpid": "Perera-T-A" }, { "family_name": "Scott", "given_name": "K. S.", "clpid": "Scott-K-S" }, { "family_name": "Ade", "given_name": "P. A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Kim", "given_name": "S.", "clpid": "Kim-S" }, { "family_name": "Kang", "given_name": "Y.", "clpid": "Kang-Y" }, { "family_name": "Lydon", "given_name": "D.", "clpid": "Lydon-D" }, { "family_name": "Mauskopf", "given_name": "P. D.", "orcid": "0000-0001-6397-5516", "clpid": "Mauskopf-P-D" }, { "family_name": "Predmore", "given_name": "C. R.", "clpid": "Predmore-C-R" }, { "family_name": "Roberts", "given_name": "C. M.", "clpid": "Roberts-C-M" }, { "family_name": "Souccar", "given_name": "K.", "clpid": "Souccar-K" }, { "family_name": "Yun", "given_name": "M. S.", "orcid": "0000-0001-7095-7543", "clpid": "Yun-Min-S" } ], "abstract": "AzTEC is a mm-wavelength bolometric camera utilizing 144 silicon nitride micromesh detectors. Here, we describe the AzTEC instrument architecture and its use as an astronomical\ninstrument. We report on several performance metrics measured during a three-month observing campaign at the James Clerk Maxwell Telescope and conclude with our plans for AzTEC as a facility instrument on the Large Millimetre Telescope.", "doi": "10.1111/j.1365-2966.2008.12980.x", "issn": "0035-8711", "publisher": "Royal Astronomical Society", "publication": "Monthly Notices of the Royal Astronomical Society", "publication_date": "2008-05-11", "series_number": "2", "volume": "386", "issue": "2", "pages": "807-818" }, { "id": "authors:d8v09-vjk44", "collection": "authors", "collection_id": "d8v09-vjk44", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200205-145816404", "type": "article", "title": "Status of the Cryogenic Dark Matter Search Experiment", "author": [ { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" } ], "abstract": "The Cryogenic Dark Matter Search experiment (CDMS) is using Phonon+ Ionization detectors to search for Dark Matter in the form of Weakly Interactive Massive Particles (WIMPs). We report the current status of the experiment and its perspective to achieve the sensitivity goal of the cross section: \u03c3_(WIMP-nucleon)\u223c1\u00d710\u207b\u2074\u2074 cm\u00b2 (Spin independent).", "doi": "10.1007/s10909-008-9741-6", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2008-05", "series_number": "3-4", "volume": "151", "issue": "3-4", "pages": "800-805" }, { "id": "authors:nfsv4-mdq61", "collection": "authors", "collection_id": "nfsv4-mdq61", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200728-152911661", "type": "article", "title": "A millimeter and submillimeter kinetic inductance detector camera", "author": [ { "family_name": "Schlaerth", "given_name": "J.", "clpid": "Schlaerth-J-A" }, { "family_name": "Vayonakis", "given_name": "A.", "clpid": "Vayonakis-A" }, { "family_name": "Day", "given_name": "P.", "clpid": "Day-P-K" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Gao", "given_name": "J.", "clpid": "Gao-J" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Kumar", "given_name": "S.", "clpid": "Kumar-S" }, { "family_name": "Leduc", "given_name": "H.", "clpid": "LeDuc-H-G" }, { "family_name": "Mazin", "given_name": "B.", "clpid": "Mazin-B-A" }, { "family_name": "Vaillancourt", "given_name": "J.", "clpid": "Vaillancourt-J-E" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "We present results from a demonstration camera using Microwave Kinetic Inductance Detectors (MKIDs) (Day et al. in Nature 425, 817\u2013821, [2003]) at the Caltech Submillimeter Observatory. The focal plane consists of 16 two-color (240 and 350 GHz) pixels. Each pixel is a phased-array of slot dipole antenna whose output power is coupled to MKIDs via in-line color-defining bandpass filters. A prototype software-defined radio system was used to read out up to four MKIDs simultaneously. We obtained maps of Jupiter, Saturn, and G34.3 and demonstrated sensitivities of approximately 1 Jy s\u00bd and 10 Jy s\u00bd in the two bands, respectively, limited by detector noise due to a low-efficiency optical train. We anticipate that a second engineering run in 2008 with a 36-element, 4-color array and an optimized optical train will be background limited at 240, 270, 350, and 400 GHz. We are undertaking the construction of a full-size MKID camera with 576 four-color spatial pixels and using 2304 MKIDs readout by an expanded software-defined radio system.", "doi": "10.1007/s10909-008-9728-3", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2008-05", "series_number": "3-4", "volume": "151", "issue": "3-4", "pages": "684-689" }, { "id": "authors:pdfcd-48q83", "collection": "authors", "collection_id": "pdfcd-48q83", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100505-132352969", "type": "article", "title": "A WIMP Dark Matter Detector Using MKIDs", "author": [ { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Gao", "given_name": "J.", "clpid": "Gao-J" }, { "family_name": "Moore", "given_name": "D.", "clpid": "Moore-D" }, { "family_name": "Mazin", "given_name": "B.", "clpid": "Mazin-B" }, { "family_name": "Eckart", "given_name": "M.", "clpid": "Eckart-M" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-B" }, { "family_name": "Day", "given_name": "P.", "clpid": "Day-P" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "We are pursuing the development of a phonon- and ionization-mediated WIMP dark matter detector employing microwave kinetic inductance detectors (MKIDs) in the phonon-sensing channel. Prospective advantages over existing detectors include: improved reconstruction of the phonon signal and event position; simplified readout wiring and cold electronics; and simplified and more reliable fabrication. We have modeled a simple design using available MKID sensitivity data and anticipate energy resolution as good as existing phonon-mediated detectors and improved position reconstruction. We are doing preparatory experimental work by fabricating strip absorber architectures. Measurements of diffusion length, trapping efficiency, and MKID sensitivity with these devices will enable us to design a 1 cm^2\u00d72 mm prototype device to demonstrate phonon energy resolution and position reconstruction.", "doi": "10.1007/s10909-007-9687-0", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2008-04", "series_number": "1-2", "volume": "151", "issue": "1-2", "pages": "550-556" }, { "id": "authors:9389e-2v831", "collection": "authors", "collection_id": "9389e-2v831", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200728-152911552", "type": "article", "title": "Optical/UV and x-ray microwave kinetic inductance strip detectors", "author": [ { "family_name": "Mazin", "given_name": "B. A.", "clpid": "Mazin-B-A" }, { "family_name": "Eckart", "given_name": "M. E.", "clpid": "Eckart-M-E" }, { "family_name": "Bumble", "given_name": "B.", "clpid": "Bumble-B" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Day", "given_name": "P. K.", "clpid": "Day-P-K" }, { "family_name": "Gao", "given_name": "J.", "clpid": "Gao-J" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "abstract": "Microwave Kinetic Inductance Detectors (MKIDs) are superconducting detectors that sense the change in the surface impedance of a thin superconducting film when Cooper Pairs are broken by using a high quality factor resonant circuit. We are developing strip detectors that have aluminum MKID sensors on both ends of a rectangular tantalum strip. These devices can provide one dimensional spatial imaging with high quantum efficiency, energy resolution, and microsecond time resolution for single photons from the IR to the X-ray. We have demonstrated X-ray strip detectors with an energy resolution of 62 eV at 6 keV, and hope to improve this substantially. We will also report on our progress towards optical arrays for a planned camera for the Palomar 200\u2033 telescope.", "doi": "10.1007/s10909-007-9686-1", "issn": "0022-2291", "publisher": "Springer", "publication": "Journal of Low Temperature Physics", "publication_date": "2008-04", "series_number": "1-2", "volume": "151", "issue": "1-2", "pages": "537-543" }, { "id": "authors:wejpc-gm528", "collection": "authors", "collection_id": "wejpc-gm528", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160505-082300157", "type": "book_section", "title": "Screening Surface Contamination with BetaCage", "book_title": "Topical Workshop on Low Radioactivity Techniques", "author": [ { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Ahmed", "given_name": "Z.", "clpid": "Ahmed-Z" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Grant", "given_name": "D. R.", "clpid": "Grant-D-R" }, { "family_name": "Poinar", "given_name": "K.", "clpid": "Poinar-K" } ], "contributor": [ { "family_name": "Loaiza", "given_name": "P.", "clpid": "Loaiza-P" } ], "abstract": "Existing screening facilities are insufficiently sensitive to meet the needs of rare\u2010event experiments for low\u2010energy electron emitters and alpha\u2010decaying isotopes. To provide such screening, the BetaCage will be a low\u2010background, atmospheric\u2010pressure neon drift chamber with unprecedented sensitivity to emitters of low\u2010energy electrons and alpha particles. Minimization of the detector mass and use of radiopure materials reduce background events. The chamber design accepts nearly all alphas and low\u2010energy electrons from the sample surface while allowing excellent rejection of residual backgrounds. A non\u2010radiopure prototype is under construction to test the design. The BetaCage will provide new infrastructure for rare\u2010event science as well as for a wider community that uses radioactive screening for areas including archaeology, biology, climatology, environmental science, geology, planetary science, and integrated\u2010circuit quality control.", "doi": "10.1063/1.2722063", "isbn": "978-0-7354-0402-1", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2007-03-28", "pages": "20-25" }, { "id": "authors:p6bfd-g0k19", "collection": "authors", "collection_id": "p6bfd-g0k19", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:MAZapl06", "type": "article", "title": "Position sensitive x-ray spectrophotometer using microwave kinetic inductance detectors", "author": [ { "family_name": "Mazin", "given_name": "Benjamin A.", "clpid": "Mazin-B-A" }, { "family_name": "Bumble", "given_name": "Bruce", "clpid": "Bumble-B" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-P-K" }, { "family_name": "Eckart", "given_name": "Megan E.", "clpid": "Eckart-M-E" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" }, { "family_name": "Harrison", "given_name": "Fiona A.", "orcid": "0000-0002-4226-8959", "clpid": "Harrison-F-A" } ], "abstract": "The surface impedance of a superconductor changes when energy is absorbed and Cooper pairs are broken to produce single electron (quasiparticle) excitations. This change may be sensitively measured using a thin-film resonant circuit called a microwave kinetic inductance detector (MKID). The practical application of MKIDs for photon detection requires a method of efficiently coupling the photon energy to the MKID. The authors present results on position sensitive x-ray detectors made by using two aluminum MKIDs on either side of a tantalum photon absorber strip. Diffusion constants, recombination times, and energy resolution are reported. MKIDs can easily be scaled into large arrays.", "doi": "10.1063/1.2390664", "issn": "0003-6951", "publisher": "American Institute of Physics", "publication": "Applied Physics Letters", "publication_date": "2006-11-27", "series_number": "22", "volume": "89", "issue": "22", "pages": "Art. No. 222507" }, { "id": "authors:e8en6-yy691", "collection": "authors", "collection_id": "e8en6-yy691", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180724-085603767", "type": "book_section", "title": "SPIDER: a new balloon-borne experiment to measure CMB polarization on large angular scales", "book_title": "Ground-based and Airborne Telescopes", "author": [ { "family_name": "Montroy", "given_name": "T. E.", "clpid": "Montroy-T-E" }, { "family_name": "Brevik", "given_name": "J.", "clpid": "Brevik-J-A" }, { "family_name": "Crill", "given_name": "B. P.", "orcid": "0000-0002-4650-8518", "clpid": "Crill-B-P" }, { "family_name": "Crites", "given_name": "A.", "clpid": "Crites-A-T" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hristov", "given_name": "V. V.", "clpid": "Hristov-V-V" }, { "family_name": "Jones", "given_name": "W. C.", "clpid": "Jones-W-C" }, { "family_name": "Kuo", "given_name": "C. L.", "clpid": "Kuo-Chia-Lam" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "Mason", "given_name": "P.", "clpid": "Mason-P" }, { "family_name": "Trangsrud", "given_name": "A.", "clpid": "Trangsrud-Amy-R" } ], "contributor": [ { "family_name": "Stepp", "given_name": "Larry M.", "clpid": "Stepp-L-M" } ], "abstract": "We describe SPIDER, a novel balloon-borne experiment designed to measure the polarization of the Cosmic Microwave Background (CMB) on large angular scales. The primary goal of SPIDER is to detect the faint signature of inflationary gravitational waves in the CMB polarization. The payload consists of six telescopes, each operating in a single frequency band and cooled to 4 K by a common LN/LHe cryostat. The primary optic for each telescope is a 25 cm diameter lens cooled to 4 K. Each telescope feeds an array of antenna coupled, polarization sensitive sub-Kelvin bolometers that covers a 20 degree diameter FOV with diffraction limited resolution. The six focal planes span 70 to 300 GHz in a manner optimized to separate polarized galactic emission from CMB polarization, and together contain over 2300 detectors. Polarization modulation is achieved by rotating a cryogenic half-wave plate in front of the primary optic of each telescope. The cryogenic system is designed for 30 days of operation. Observations will be conducted during the night portions of a mid-latitude, long duration balloon flight which will circumnavigate the globe from Australia. By spinning the payload at 1 rpm with the six telescopes fixed in elevation, SPIDER will map approximately half of the sky at each frequency on each night of the flight.", "doi": "10.1117/12.670339", "isbn": "0819463329", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2006-07-12", "pages": "Art. No. 62670R" }, { "id": "authors:9tr41-wwn69", "collection": "authors", "collection_id": "9tr41-wwn69", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180717-152755343", "type": "book_section", "title": "Instrumentation for the CCAT Telescope", "book_title": "Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III", "author": [ { "family_name": "Stacey", "given_name": "G. J.", "clpid": "Stacey-G-J" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Bradford", "given_name": "C. M.", "orcid": "0000-0001-5261-7094", "clpid": "Bradford-C-M" }, { "family_name": "Dowell", "given_name": "C. D.", "clpid": "Dowell-C-D" }, { "family_name": "Cortes-Medellin", "given_name": "G.", "clpid": "Cortes-Medellin-German" }, { "family_name": "Nikola", "given_name": "T.", "clpid": "Nikola-Thomas" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" }, { "family_name": "Herter", "given_name": "T. L.", "orcid": "0000-0002-3856-8385", "clpid": "Herter-T-L" }, { "family_name": "Radford", "given_name": "S. J.", "clpid": "Radford-S-J-E" }, { "family_name": "Lloyd", "given_name": "J. P.", "clpid": "Lloyd-J-P" }, { "family_name": "Blain", "given_name": "A. W.", "orcid": "0000-0001-7489-5167", "clpid": "Blain-A-W" }, { "family_name": "Brown", "given_name": "R. L.", "clpid": "Brown-R-L" }, { "family_name": "Campbell", "given_name": "D. B.", "clpid": "Campbell-D-B" }, { "family_name": "Giovanelli", "given_name": "R.", "orcid": "0000-0001-8884-8492", "clpid": "Giovanelli-Riccardo" }, { "family_name": "Goldsmith", "given_name": "P.", "orcid": "0000-0002-6622-8396", "clpid": "Goldsmith-P-F" }, { "family_name": "Harvey", "given_name": "P. M.", "clpid": "Harvey-P-M" }, { "family_name": "Henderson", "given_name": "C.", "orcid": "0000-0001-8877-9060", "clpid": "Henderson-C-B" }, { "family_name": "Langer", "given_name": "W. D.", "clpid": "Langer-W-D" }, { "family_name": "Phillips", "given_name": "T. G.", "clpid": "Phillips-T-G" }, { "family_name": "Readhead", "given_name": "A. C. S.", "orcid": "0000-0001-9152-961X", "clpid": "Readhead-A-C-S" }, { "family_name": "Woody", "given_name": "D. P.", "clpid": "Woody-D-P" } ], "contributor": [ { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" }, { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Withington", "given_name": "Stafford", "clpid": "Withington-S" }, { "family_name": "Duncan", "given_name": "William D.", "clpid": "Duncan-W-D" } ], "abstract": "We present a first cut instrument design package for the proposed 25 meter Cornell-Caltech Atacama Telescope (CCAT). The primary science for CCAT can be achieved through wide field photometric imaging in the short submillimeter through millimeter (200 \u03bcm to 2 mm) telluric windows. We present strawman designs for two cameras: a 32,000 pixel short submillimeter (200 to 650 \u03bcm) camera using transition edge sensed bare bolometer arrays that Nyquist samples (@ 350 \u03bcm) a 5'\u00d75' field of view (FoV), and a 45,000 pixel long wavelength camera (850 \u03bcm to 2 mm) that uses slot dipole antennae coupled bolometer arrays with wavelength dependent sampling that covers up to a 20' square FoV. These are our first light instruments. We also anticipate \"borrowed\" instruments such as direct detection and heterodyne detection spectrometers will be available at, or nearly at first light.", "doi": "10.1117/12.672176", "isbn": "081946340X", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2006-07-06", "pages": "Art. No. 62751G" }, { "id": "authors:bvmjc-ne955", "collection": "authors", "collection_id": "bvmjc-ne955", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180718-113418674", "type": "book_section", "title": "Antenna-coupled TES bolometers for CMB polarimetry", "book_title": "Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III", "author": [ { "family_name": "Kuo", "given_name": "C. L.", "clpid": "Kuo-Chia-Lam" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Chattopadhyay", "given_name": "G.", "orcid": "0000-0001-7942-5025", "clpid": "Chattopadhyay-G" }, { "family_name": "Goldin", "given_name": "A.", "clpid": "Goldin-A-L" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Holmes", "given_name": "W.", "clpid": "Holmes-W" }, { "family_name": "Irwin", "given_name": "K.", "clpid": "Irwin-K" }, { "family_name": "Kenyon", "given_name": "M.", "clpid": "Kenyon-M" }, { "family_name": "Lange", "given_name": "A. E.", "clpid": "Lange-A-E" }, { "family_name": "LeDuc", "given_name": "H. G.", "clpid": "LeDuc-H-G" }, { "family_name": "Rossinot", "given_name": "P.", "clpid": "Rossinot-P" }, { "family_name": "Vayonakis", "given_name": "A.", "clpid": "Vayonakis-A" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" }, { "family_name": "Yun", "given_name": "M.", "clpid": "Yun-M" }, { "family_name": "Zmuidzinas", "given_name": "J.", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" } ], "contributor": [ { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" }, { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Withington", "given_name": "Stafford", "clpid": "Withington-S" }, { "family_name": "Duncan", "given_name": "William D.", "clpid": "Duncan-W-D" } ], "abstract": "We have developed a completely lithographic antenna-coupled bolometer for CMB polarimetry. The necessary components of a millimeter wave radiometer - a beam forming element, a band defining filter, and the TES detectors - are fabricated on a silicon chip with photolithography. The densely populated antennas allow a very efficient use of the focal plane area. We have fabricated and characterized a series of prototype devices. We find that their properties, including the frequency and angular responses, are in good agreement with the theoretical expectations. The devices are undergoing optimization for upcoming CMB experiments.", "doi": "10.1117/12.672737", "isbn": "081946340X", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2006-06-27", "pages": "Art. No. 62751M" }, { "id": "authors:p1v1p-jsk79", "collection": "authors", "collection_id": "p1v1p-jsk79", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200318-101419532", "type": "book_section", "title": "The SuperCDMS Experiment", "book_title": "Dark Matter in Astro- and Particle Physics", "author": [ { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Akerib", "given_name": "D. S." }, { "family_name": "Attisha", "given_name": "M. J." }, { "family_name": "Bailey", "given_name": "C. N." }, { "family_name": "Baudis", "given_name": "L." }, { "family_name": "Bauer", "given_name": "D. A." }, { "family_name": "Brink", "given_name": "P. L." }, { "family_name": "Brusov", "given_name": "P. P." }, { "family_name": "Bunker", "given_name": "R." }, { "family_name": "Cabrera", "given_name": "B." }, { "family_name": "Caldwell", "given_name": "D. O." }, { "family_name": "Chang", "given_name": "C. L." }, { "family_name": "Cooley", "given_name": "J." }, { "family_name": "Crisler", "given_name": "M. B." }, { "family_name": "Cushman", "given_name": "P." }, { "family_name": "Denes", "given_name": "P." }, { "family_name": "Dragowsky", "given_name": "M. R." }, { "family_name": "Duong", "given_name": "L." }, { "family_name": "Filippini", "given_name": "J." }, { "family_name": "Gaitskell", "given_name": "R. J." }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Grant", "given_name": "D. R." }, { "family_name": "Hennings-Yeomans", "given_name": "R." }, { "family_name": "Holmgren", "given_name": "D." }, { "family_name": "Huber", "given_name": "M. E." }, { "family_name": "Irwin", "given_name": "K." }, { "family_name": "Lu", "given_name": "A." }, { "family_name": "Mahapatra", "given_name": "R." }, { "family_name": "Meunier", "given_name": "P." }, { "family_name": "Mirabolfathi", "given_name": "N." }, { "family_name": "Nelson", "given_name": "H." }, { "family_name": "Ogburn", "given_name": "R. W." }, { "family_name": "Ramberg", "given_name": "E." }, { "family_name": "Reisetter", "given_name": "A." }, { "family_name": "Saab", "given_name": "T." }, { "family_name": "Sadoulet", "given_name": "B." }, { "family_name": "Sander", "given_name": "J." }, { "family_name": "Seitz", "given_name": "D. N." }, { "family_name": "Serfass", "given_name": "B." }, { "family_name": "Sundqvist", "given_name": "K. M." }, { "family_name": "Thompson", "given_name": "J-P. F." }, { "family_name": "Yellin", "given_name": "S." }, { "family_name": "Yoo", "given_name": "J." }, { "family_name": "Young", "given_name": "B. A." } ], "contributor": [ { "family_name": "Klapdor-Kleingrothaus", "given_name": "Hans Volker", "clpid": "Klapdor-Kleingrothaus-H-V" }, { "family_name": "Arnowitt", "given_name": "Richard", "clpid": "Arnowitt-R" } ], "abstract": "Nonluminous, nonbaryonic, weakly interacting massive particles (WIMPs) [1, 2] may constitute most of the matter in the universe [3]. WIMPs are expected to be in a roughly isothermal Galactic halo. They would interact elastically with nuclei, generating a recoil energy of a few tens of keV, at a rate \u227e1 event kg\u207b\u00b9 d\u207b\u00b9 [2, 4, 5].", "doi": "10.1007/3-540-26373-x_20", "isbn": "978-3-540-26372-2", "publisher": "Springer", "place_of_publication": "Berlin", "publication_date": "2006-02-16", "pages": "259-268" }, { "id": "authors:mhgqz-prr20", "collection": "authors", "collection_id": "mhgqz-prr20", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110209-090952790", "type": "article", "title": "Limits on Spin-Independent Interactions of Weakly Interacting Massive Particles with Nucleons from the Two-Tower Run of the Cryogenic Dark Matter Search", "author": [ { "family_name": "Akerib", "given_name": "D. S.", "clpid": "Akerib-D-S" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" }, { "literal": "CDMS Collaboration" } ], "abstract": "We report new results from the Cryogenic Dark Matter Search (CDMS II) at the Soudan Underground\nLaboratory. Two towers, each consisting of six detectors, were operated for 74.5 live days, giving\nspectrum-weighted exposures of 34 (12) kg d for the Ge (Si) targets after cuts, averaged over recoil\nenergies 10\u2013100 keV for a weakly interacting massive particle (WIMP) mass of 60 GeV/c^2. A blind\nanalysis was conducted, incorporating improved techniques for rejecting surface events. No WIMP signal\nexceeding expected backgrounds was observed. When combined with our previous results from Soudan,\nthe 90% C.L. upper limit on the spin-independent WIMP-nucleon cross section is 1.6 x 10^(-43) cm^2 from\nGe and 3 x 10^(-42) cm^2 from Si, for a WIMP mass of 60 GeV/c^2. The combined limit from Ge (Si) is a\nfactor of 2.5 (10) lower than our previous results and constrains predictions of supersymmetric models.", "doi": "10.1103/PhysRevLett.96.011302", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2006-01-13", "series_number": "1", "volume": "96", "issue": "1", "pages": "Art. No. 011302" }, { "id": "authors:5fdkd-6ey11", "collection": "authors", "collection_id": "5fdkd-6ey11", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110209-085305892", "type": "article", "title": "Limits on spin-dependent WIMP-nucleon interactions from the Cryogenic Dark Matter Search", "author": [ { "family_name": "Akerib", "given_name": "D. S.", "clpid": "Akerib-D-S" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" }, { "literal": "CDMS Collaboration" } ], "abstract": "The Cryogenic Dark Matter Search (CDMS) is an experiment to detect weakly interacting massive\nparticles (WIMPs), which may constitute the universe's dark matter, based on their interactions with Ge\nand Si nuclei. We report the results of an analysis of data from the first two runs of CDMS at the Soudan\nUnderground Laboratory in terms of spin-dependent WIMP-nucleon interactions on ^(73)Ge and ^(29)Si. These\ndata exclude new regions of WIMP parameter space, including regions relevant to spin-dependent\ninterpretations of the annual modulation signal reported by the DAMA/NaI experiment.", "doi": "10.1103/PhysRevD.73.011102", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2006-01-01", "series_number": "1", "volume": "73", "issue": "1", "pages": "Art. No. 011102" }, { "id": "authors:7j3n0-5y220", "collection": "authors", "collection_id": "7j3n0-5y220", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110304-110358706", "type": "book_section", "title": "A complete 1.1mm survey of Perseus with Bolocam", "book_title": "Spitzer Space Telescope: New Views of the Cosmos", "author": [ { "family_name": "Enoch", "given_name": "Melissa L.", "clpid": "Enoch-M-L" }, { "family_name": "Sargent", "given_name": "Anneila I.", "orcid": "0000-0002-4633-5098", "clpid": "Sargent-A-I" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Evans", "given_name": "Neal J., II", "orcid": "0000-0001-5175-1777", "clpid": "Evans-N-J-II" }, { "family_name": "Young", "given_name": "Kaisa", "clpid": "Young-K-E" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "literal": "c2d Spitzer Legacy Team" }, { "literal": "Bolocam Team" } ], "contributor": [ { "family_name": "Armus", "given_name": "L.", "clpid": "Armus-L" }, { "family_name": "Reach", "given_name": "W. T.", "clpid": "Reach-W-T" } ], "abstract": "We have completed a 7.5 square degree \u03bb=1.1mm map of Perseus\nusing Bolocam. Our map is the largest unbiased survey of Perseus at millimeter wavelengths to date, and covers the same area as the c2d Spitzer IRAC and MIPS maps of Perseus. We find that that the mass function shape is similar to that seen in other clouds and to the local IMF. Despite the large area surveyed, few new sources are found outside the known cluster regions.", "isbn": "978-1-583812-25-9", "publisher": "Astronomical Society of the Pacific", "place_of_publication": "San Francisco, CA", "publication_date": "2006", "pages": "137-138" }, { "id": "authors:qdh3d-vha07", "collection": "authors", "collection_id": "qdh3d-vha07", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180724-091839840", "type": "book_section", "title": "Bolocam: status and observations", "book_title": "Millimeter and Submillimeter Detectors for Astronomy II", "author": [ { "family_name": "Haig", "given_name": "Douglas J.", "clpid": "Haig-D-J" }, { "family_name": "Ade", "given_name": "Peter A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Aguirre", "given_name": "James E.", "orcid": "0000-0002-4810-666X", "clpid": "Aguirre-J-E" }, { "family_name": "Bock", "given_name": "James J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Edgington", "given_name": "Samantha F.", "clpid": "Edgington-S-F" }, { "family_name": "Enoch", "given_name": "Melissa L.", "clpid": "Enoch-M-L" }, { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Goldin", "given_name": "Alexey", "clpid": "Goldin-A" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Heng", "given_name": "Kevin", "orcid": "0000-0003-1907-5910", "clpid": "Heng-Kevin" }, { "family_name": "Laurent", "given_name": "Glenn", "clpid": "Laurent-G-T" }, { "family_name": "Maloney", "given_name": "Philip R.", "clpid": "Maloney-P-R" }, { "family_name": "Mauskopf", "given_name": "Philip D.", "orcid": "0000-0001-6397-5516", "clpid": "Mauskopf-P-D" }, { "family_name": "Rossinot", "given_name": "Philippe", "clpid": "Rossinot-P" }, { "family_name": "Sayers", "given_name": "Jack", "orcid": "0000-0002-8213-3784", "clpid": "Sayers-Jack" }, { "family_name": "Stover", "given_name": "Patrick", "clpid": "Stover-P" }, { "family_name": "Tucker", "given_name": "Carole", "clpid": "Tucker-C-E" } ], "contributor": [ { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" }, { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Withington", "given_name": "Stafford", "clpid": "Withington-S" } ], "abstract": "Bolocam is a millimetre-wave (1.1 and 2.1 mm) camera with an array of 119 bolometers. It has been commissioned at the Caltech Submillimeter Observatory in Hawaii and is now in routine operation. Here we give an overview of the instrument and the data reduction pipeline. We discuss models of the sensitivity of Bolocam in different observing modes and under different atmospheric conditions. We briefly discuss observations of star-forming Galactic molecular clouds, a blank field survey for sub-millimeter galaxies, preliminary results of a blank-field CMB secondary anisotropy survey and discuss observations of galaxy clusters using the Sunyaev-Zel'dovich effect.", "doi": "10.1117/12.553154", "isbn": "0819454303", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2004-10-08", "pages": "78-94" }, { "id": "authors:emb2e-dfv07", "collection": "authors", "collection_id": "emb2e-dfv07", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180717-104025613", "type": "book_section", "title": "The large Atacama submillimeter telescope", "book_title": "Millimeter and Submillimeter Detectors for Astronomy II", "author": [ { "family_name": "Herter", "given_name": "Terry", "orcid": "0000-0002-3856-8385", "clpid": "Herter-T-L" }, { "family_name": "Brown", "given_name": "Robert", "clpid": "Brown-R" }, { "family_name": "Giovanelli", "given_name": "Riccardo", "orcid": "0000-0001-8884-8492", "clpid": "Giovanelli-R" }, { "family_name": "Stacey", "given_name": "Gordon", "clpid": "Stacey-G-J" }, { "family_name": "Zmuidzinas", "given_name": "Jonas", "orcid": "0000-0002-3330-5439", "clpid": "Zmuidzinas-J" }, { "family_name": "Woody", "given_name": "David", "clpid": "Woody-D-P" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Blain", "given_name": "Andrew", "orcid": "0000-0001-7489-5167", "clpid": "Blain-A-W" } ], "contributor": [ { "family_name": "Zmuidzinas", "given_name": "Jonas", "clpid": "Zmuidzinas-J" }, { "family_name": "Holland", "given_name": "Wayne S.", "clpid": "Holland-W-S" }, { "family_name": "Withington", "given_name": "Stafford", "clpid": "Withington-S" } ], "abstract": "Cornell and Caltech are undertaking a two year conceptual design study for a 25-m class sub-mm telescope. The nominal location for this facility will be the high Atacama Desert of Northern Chile. The baseline design is a segmented mirror telescope optimized for operation at wavelengths longer than 200 microns to take advantage of a low precipitable water vapor at the site. We discuss science drivers and their implications for telescope design and technical requirements, and planned technical study areas.", "doi": "10.1117/12.551893", "isbn": "0819454303", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2004-10-08", "pages": "55-62" }, { "id": "authors:2mshw-m8s16", "collection": "authors", "collection_id": "2mshw-m8s16", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180724-090752479", "type": "book_section", "title": "Current status of Bolocam: a large-format millimeter-wave bolometer camera", "book_title": "Millimeter and Submillimeter Detectors for Astronomy", "author": [ { "family_name": "Glenn", "given_name": "Jason", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Ade", "given_name": "Peter A. R.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Amarie", "given_name": "Mihail", "clpid": "Amraie-M" }, { "family_name": "Bock", "given_name": "James J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Edgington", "given_name": "Samantha F.", "clpid": "Edgington-S-F" }, { "family_name": "Goldin", "given_name": "Alexey", "clpid": "Goldin-A" }, { "family_name": "Golwala", "given_name": "Sunil", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Haig", "given_name": "Douglas", "clpid": "Haig-D" }, { "family_name": "Lange", "given_name": "Andrew E.", "clpid": "Lange-A-E" }, { "family_name": "Laurent", "given_name": "Glenn", "clpid": "Laurent-G-T" }, { "family_name": "Mauskopf", "given_name": "Philip D.", "orcid": "0000-0001-6397-5516", "clpid": "Mauskopf-P-D" }, { "family_name": "Yun", "given_name": "Minhee", "clpid": "Yun-Minhee" }, { "family_name": "Nguyen", "given_name": "Hien", "clpid": "Nguyen-Hien-Trong" } ], "contributor": [ { "family_name": "Phillips", "given_name": "Thomas G.", "clpid": "Phillips-T-G" } ], "abstract": "We describe the design and performance of Bolocam, a 144-element, bolometric, millimeter-wave camera. Bolocam is currently in its commissioning stage at the Caltech Submillimeter Observatory. We compare the instrument performance measured at the telescope with a detailed sensitivity model, discuss the factors limiting the current sensitivity, and describe our plans for future improvements intended to increase the mapping speed.", "doi": "10.1117/12.459369", "isbn": "9780819446343", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2003-02-17", "pages": "30-40" }, { "id": "authors:a8gs1-0mr60", "collection": "authors", "collection_id": "a8gs1-0mr60", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:ABRprd02", "type": "article", "title": "Exclusion limits on the WIMP-nucleon cross section from the Cryogenic Dark Matter Search", "author": [ { "family_name": "Abrams", "given_name": "D.", "clpid": "Abrams-D" }, { "family_name": "Akerib", "given_name": "D. S.", "clpid": "Akerib-D-S" }, { "family_name": "Armel-Funkhouser", "given_name": "M. S.", "clpid": "Armel-Funkhouser-M-S" }, { "family_name": "Baudis", "given_name": "L.", "clpid": "Baudis-L" }, { "family_name": "Bauer", "given_name": "D. A.", "clpid": "Bauer-D-A" }, { "family_name": "Bolozdynya", "given_name": "A.", "clpid": "Bolozdynya-A" }, { "family_name": "Brink", "given_name": "P. L.", "clpid": "Brink-P-L" }, { "family_name": "Bunker", "given_name": "R.", "clpid": "Bunker-R" }, { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Caldwell", "given_name": "D. O.", "clpid": "Caldwell-D-O" }, { "family_name": "Castle", "given_name": "J. P.", "clpid": "Castle-J-P" }, { "family_name": "Chang", "given_name": "C. L.", "clpid": "Chang-C-L" }, { "family_name": "Clarke", "given_name": "R. M.", "clpid": "Clarke-R-M" }, { "family_name": "Crisler", "given_name": "M. B.", "clpid": "Crisler-M-B" }, { "family_name": "Dixon", "given_name": "R.", "clpid": "Dixon-R" }, { "family_name": "Driscoll", "given_name": "D.", "clpid": "Driscoll-D" }, { "family_name": "Eichblatt", "given_name": "S.", "clpid": "Eichblatt-S" }, { "family_name": "Gaitskell", "given_name": "R. J.", "clpid": "Gaitskell-R-J" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Haller", "given_name": "E. E.", "clpid": "Haller-E-E" }, { "family_name": "Hellmig", "given_name": "J.", "clpid": "Hellmig-J" }, { "family_name": "Holmgren", "given_name": "D.", "clpid": "Holmgren-D" }, { "family_name": "Huber", "given_name": "M. E.", "clpid": "Huber-M-E" }, { "family_name": "Kamat", "given_name": "S.", "clpid": "Kamat-S" }, { "family_name": "A. Lu", "given_name": "S.", "clpid": "Lu-S" }, { "family_name": "Mandic", "given_name": "V.", "clpid": "Mandic-V" }, { "family_name": "Martinis", "given_name": "J. M.", "clpid": "Martinis-J-M" }, { "family_name": "Meunier", "given_name": "P.", "clpid": "Meunier-P" }, { "family_name": "Nam", "given_name": "S. W.", "clpid": "Nam-S-W" }, { "family_name": "Nelson", "given_name": "H.", "clpid": "Nelson-H" }, { "family_name": "Perera", "given_name": "T. A.", "clpid": "Perera-T-A" }, { "family_name": "Perillo Isaac", "given_name": "M. C.", "clpid": "Perillo-Isaac-M-C" }, { "family_name": "Rau", "given_name": "W.", "clpid": "Rau-W" }, { "family_name": "Ross", "given_name": "R. R.", "clpid": "Ross-R-R" }, { "family_name": "Saab", "given_name": "T.", "clpid": "Saab-T" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Sander", "given_name": "J.", "clpid": "Sander-J" }, { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Shutt", "given_name": "T.", "clpid": "Shutt-T" }, { "family_name": "Smith", "given_name": "A.", "orcid": "0000-0002-1938-4660", "clpid": "Smith-A" }, { "family_name": "Sonnenschein", "given_name": "A. H.", "clpid": "Sonnenschein-A-H" }, { "family_name": "Spadafora", "given_name": "A. L.", "clpid": "Spadafora-A-L" }, { "family_name": "Wang", "given_name": "G.", "clpid": "Wang-G" }, { "family_name": "Yellin", "given_name": "S.", "clpid": "Yellin-S" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" }, { "literal": "CDMS Collaboration" } ], "abstract": "The Cryogenic Dark Matter Search (CDMS) employs low-temperature Ge and Si detectors to search for weakly interacting massive particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against interactions of background particles. For recoil energies above 10 keV, events due to background photons are rejected with >99.9% efficiency, and surface events are rejected with >95% efficiency. The estimate of the background due to neutrons is based primarily on the observation of multiple-scatter events that should all be neutrons. Data selection is determined primarily by examining calibration data and vetoed events. Resulting efficiencies should be accurate to \u223c10%. Results of CDMS data from 1998 and 1999 with a relaxed fiducial-volume cut (resulting in 15.8 kg days exposure on Ge) are consistent with an earlier analysis with a more restrictive fiducial-volume cut. Twenty-three WIMP candidate events are observed, but these events are consistent with a background from neutrons in all ways tested. Resulting limits on the spin-independent WIMP-nucleon elastic-scattering cross section exclude unexplored parameter space for WIMPs with masses between 10\u201370 GeV/c2. These limits border, but do not exclude, parameter space allowed by supersymmetry models and accelerator constraints. Results are compatible with some regions reported as allowed at 3\u03c3 by the annual-modulation measurement of the DAMA Collaboration. However, under the assumptions of standard WIMP interactions and a standard halo, the results are incompatible with the DAMA most likely value at >99.9% confidence level (C.L.), and are incompatible with the model-independent annual-modulation signal of DAMA at 99.99% C.L. in the asymptotic limit.", "doi": "10.1103/PhysRevD.66.122003", "issn": "2470-0010", "publisher": "American Physical Society", "publication": "Physical Review D", "publication_date": "2002-12-15", "series_number": "12", "volume": "66", "issue": "12", "pages": "Art. No. 122003" }, { "id": "authors:ssrdm-5sb75", "collection": "authors", "collection_id": "ssrdm-5sb75", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:MAUaipcp02", "type": "book_section", "title": "Results from the first engineering run of BOLOCAM and plans for the future", "book_title": "Experimental cosmology at millimetre wavelengths : 2K1BC workshop, Breuil-Cervinia (AO), Valle d'Aosta, Italy, 9-13 July 2001", "author": [ { "family_name": "Mauskopf", "given_name": "P.", "orcid": "0000-0001-6397-5516", "clpid": "Mauskopf-P-D" }, { "family_name": "Ade", "given_name": "P.", "orcid": "0000-0002-5127-0401", "clpid": "Ade-P-A-R" }, { "family_name": "Bock", "given_name": "J. J.", "orcid": "0000-0002-5710-5212", "clpid": "Bock-J-J" }, { "family_name": "Edgington", "given_name": "S.", "clpid": "Edgington-S" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Goldin", "given_name": "A.", "clpid": "Goldin-A-L" }, { "family_name": "Glenn", "given_name": "J.", "orcid": "0000-0001-7527-2017", "clpid": "Glenn-J" }, { "family_name": "Haig", "given_name": "D.", "clpid": "Haig-D" }, { "family_name": "Hristov", "given_name": "V.", "clpid": "Hristov-V-V" }, { "family_name": "Knowles", "given_name": "B.", "clpid": "Knowles-B" }, { "family_name": "Lange", "given_name": "A.", "clpid": "Lange-A-E" }, { "family_name": "Nguyen", "given_name": "H.", "clpid": "Nguyen-Hien-Trong" }, { "family_name": "Rownd", "given_name": "B.", "clpid": "Rownd-B" } ], "contributor": [ { "family_name": "De Petris", "given_name": "Marco", "clpid": "De-Petric-M" }, { "family_name": "Gervasi", "given_name": "Massimo", "clpid": "Gervasi-M" } ], "abstract": "We present results from the engineering run of the BOLOCAM receiver at the Caltech Submillimeter Observatory in May, 2000 and simulations of the sensitivity of the completed BOLOCAM receiver to astrophysical sources. BOLOCAM is a 144 element array of bolometers designed to operate in the millimeter wave atmospheric windows at 150, 220, and 280 GHz. These bands are well suited to studies of the Sunyaev-Zel'dovich effect in distant clusters of galaxies as well as measurements of the emission of interstellar dust.", "doi": "10.1063/1.1475612", "isbn": "0-7354-0062-8", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2002-05-08", "pages": "107-115" }, { "id": "authors:erxb8-kh478", "collection": "authors", "collection_id": "erxb8-kh478", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:SHUaipcp02", "type": "book_section", "title": "Charge collection and electrode structures in ionization and phonon based dark matter detectors", "book_title": "International Workshop on Low Temperature Detectors, 9th, Madison, Wisconsin (USA), 22-27 July 2001", "author": [ { "family_name": "Shutt", "given_name": "T.", "clpid": "Shutt-T" }, { "family_name": "Kesden", "given_name": "M.", "orcid": "0000-0002-5987-1471", "clpid": "Kesden-M" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Emes", "given_name": "J.", "clpid": "Emes-J" }, { "family_name": "Hellmig", "given_name": "J.", "clpid": "Hellmig-J" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" }, { "literal": "CDMS Detector Group" } ], "contributor": [ { "family_name": "Porter", "given_name": "F. Scott" }, { "family_name": "McCammon", "given_name": "Dan" }, { "family_name": "Galeazzi", "given_name": "Massimiliano" }, { "family_name": "Stahle", "given_name": "Caroline K." } ], "abstract": "We report on progress in our understanding of the physics of of implanted contacts, amorphous layer structures and Schottky contacts on detectors based on the simultaneous ionization and phonon based at 20 mK. Loss of charge for events near the contacts limits the capabilities of these detectors for detecting dark matter, an effect which is minimized by use of amorphous blocking layers.", "doi": "10.1063/1.1457698", "isbn": "0-7354-0049-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2002-02-05", "pages": "513-516" }, { "id": "authors:0eewn-xz288", "collection": "authors", "collection_id": "0eewn-xz288", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:ABUprl00", "type": "article", "title": "Exclusion limits on the WIMP-nucleon cross section from the Cryogenic Dark Matter Search", "author": [ { "family_name": "Abusaidi", "given_name": "R.", "clpid": "Abusaidi-R" }, { "family_name": "Akerib", "given_name": "D. S.", "clpid": "Akerib-D-S" }, { "family_name": "Barnes", "given_name": "P. D., Jr.", "clpid": "Barnes-P-D-Jr" }, { "family_name": "Bauer", "given_name": "D. A.", "clpid": "Bauer-D-A" }, { "family_name": "Bolozdynya", "given_name": "A.", "clpid": "Bolozdynya-A" }, { "family_name": "Brink", "given_name": "P. L.", "clpid": "Brink-P-L" }, { "family_name": "Bunker", "given_name": "R.", "clpid": "Bunker-R" }, { "family_name": "Cabrera", "given_name": "B.", "clpid": "Cabrera-B" }, { "family_name": "Caldwell", "given_name": "D. O.", "clpid": "Caldwell-D-O" }, { "family_name": "Castle", "given_name": "J. P.", "clpid": "Castle-J-P" }, { "family_name": "Clarke", "given_name": "R. M.", "clpid": "Clarke-R-M" }, { "family_name": "Colling", "given_name": "P.", "clpid": "Colling-P" }, { "family_name": "Crisler", "given_name": "M. B.", "clpid": "Crisler-M-B" }, { "family_name": "Cummings", "given_name": "A. C.", "orcid": "0000-0002-3840-7696", "clpid": "Cummings-A-C" }, { "family_name": "Da Silva", "given_name": "A.", "clpid": "Da-Silva-A" }, { "family_name": "Davies", "given_name": "A. K.", "clpid": "Davies-A-K" }, { "family_name": "Dixon", "given_name": "R.", "clpid": "Dixon-R" }, { "family_name": "Dougherty", "given_name": "B. L.", "clpid": "Dougherty-B-L" }, { "family_name": "Driscoll", "given_name": "D.", "clpid": "Driscoll-D" }, { "family_name": "Eichblatt", "given_name": "S.", "clpid": "Eichblatt-S" }, { "family_name": "Emes", "given_name": "J.", "clpid": "Emes-J" }, { "family_name": "Gaitskell", "given_name": "R. J.", "clpid": "Gaitskell-R-J" }, { "family_name": "Golwala", "given_name": "S. R.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Hale", "given_name": "D.", "clpid": "Hale-D" }, { "family_name": "Haller", "given_name": "E. E.", "clpid": "Haller-E-E" }, { "family_name": "Hellmig", "given_name": "J.", "clpid": "Hellmig-J" }, { "family_name": "Huber", "given_name": "M. E.", "clpid": "Huber-M-E" }, { "family_name": "Irwin", "given_name": "K. D.", "clpid": "Irwin-K-D" }, { "family_name": "Jochum", "given_name": "J.", "clpid": "Jochum-J" }, { "family_name": "Lipschultz", "given_name": "F. P.", "clpid": "Lipschultz-F-P" }, { "family_name": "Lu", "given_name": "A.", "clpid": "Lu-A" }, { "family_name": "Mandic", "given_name": "V.", "clpid": "Mandic-V" }, { "family_name": "Martinis", "given_name": "J. M.", "clpid": "Martinis-J-M" }, { "family_name": "Nam", "given_name": "S. W.", "clpid": "Nam-S-W" }, { "family_name": "Nelson", "given_name": "H.", "clpid": "Nelson-H" }, { "family_name": "Neuhauser", "given_name": "B.", "clpid": "Neuhauser-B" }, { "family_name": "Penn", "given_name": "M. J.", "clpid": "Penn-M-J" }, { "family_name": "Perera", "given_name": "T. A.", "clpid": "Perera-T-A" }, { "family_name": "Isaac", "given_name": "M. C. Perillo", "clpid": "Isaac-M-C-P" }, { "family_name": "Pritychenko", "given_name": "B.", "clpid": "Pritychenko-B" }, { "family_name": "Ross", "given_name": "R. R.", "clpid": "Ross-R-R" }, { "family_name": "Saab", "given_name": "T.", "clpid": "Saab-T" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Schnee", "given_name": "R. W.", "clpid": "Schnee-R-W" }, { "family_name": "Seitz", "given_name": "D. N.", "clpid": "Seitz-D-N" }, { "family_name": "Shestople", "given_name": "P.", "clpid": "Shestople-P" }, { "family_name": "Shutt", "given_name": "T.", "clpid": "Shutt-T" }, { "family_name": "Smith", "given_name": "A.", "orcid": "0000-0002-1938-4660", "clpid": "Smith-A" }, { "family_name": "Smith", "given_name": "G. W.", "clpid": "Smith-G-W" }, { "family_name": "Sonnenschein", "given_name": "A. H.", "clpid": "Sonnenschein-A-H" }, { "family_name": "Spadafora", "given_name": "A. L.", "clpid": "Spadafora-A-L" }, { "family_name": "Stockwell", "given_name": "W.", "clpid": "Stockwell-W" }, { "family_name": "Taylor", "given_name": "J. D.", "clpid": "Taylor-J-D" }, { "family_name": "White", "given_name": "S.", "clpid": "White-S" }, { "family_name": "Yellin", "given_name": "S.", "clpid": "Yellin-S" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" }, { "literal": "CDMS Collaboration" } ], "abstract": "The Cryogenic Dark Matter Search (CDMS) employs Ge and Si detectors to search for weakly interacting massive particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against interactions of background particles. CDMS data, accounting for the neutron background, give limits on the spin-independent WIMP-nucleon elastic-scattering cross section that exclude unexplored parameter space above 10 GeV/c^2 WIMP mass and, at >75% C.L., the entire 3\u03c3 allowed region for the WIMP signal reported by the DAMA experiment.", "doi": "10.1103/PhysRevLett.84.5699", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2000-06-19", "series_number": "25", "volume": "84", "issue": "25", "pages": "5699-5703" }, { "id": "authors:pyf0w-56980", "collection": "authors", "collection_id": "pyf0w-56980", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:JOCjap98.887", "type": "article", "title": "Modeling the power flow in normal conductor-insulator-superconductor junctions", "author": [ { "family_name": "Jochum", "given_name": "J.", "clpid": "Jochum-J" }, { "family_name": "Mears", "given_name": "C.", "clpid": "Mears-C" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Castle", "given_name": "J. P.", "clpid": "Castle-J-P" }, { "family_name": "Cunningham", "given_name": "M. F.", "clpid": "Cunningham-M-F" }, { "family_name": "Drury", "given_name": "O. B.", "clpid": "Drury-O-B" }, { "family_name": "Frank", "given_name": "M.", "clpid": "Frank-M" }, { "family_name": "Labov", "given_name": "S. E.", "clpid": "Labov-S-E" }, { "family_name": "Lipschultz", "given_name": "F. P.", "clpid": "Lipschultz-F-P" }, { "family_name": "Netel", "given_name": "H.", "clpid": "Netel-H" }, { "family_name": "Neuhauser", "given_name": "B.", "clpid": "Neuhauser-B" } ], "abstract": "Normal conductor-insulator-superconductor (NIS) junctions promise to be interesting for x-ray and phonon sensing applications, in particular due to the expected self-cooling of the N electrode by the tunneling current. Such cooling would enable the operation of the active element of the sensor below the cryostat temperature and at a correspondingly higher sensitivity. It would also allow the use of MS junctions as microcoolers. At present, this cooling has not been realized in large area junctions (suitable for a number of detector applications). In this article, we discuss a detailed modeling of the heat flow in such junctions; we show how the heat flow into the normal electrode by quasiparticle back-tunneling and phonon absorption from quasiparticle pair recombination can overcompensate the cooling power. This provides a microscopic explanation of the self-heating effects we observe in our large area NIS junctions. The model suggests a number of possible solutions.", "doi": "10.1063/1.367121", "issn": "0021-8979", "publisher": "American Institute of Physics", "publication": "Journal of Applied Physics", "publication_date": "1998-03-15", "series_number": "6", "volume": "83", "issue": "6", "pages": "3217-3224" }, { "id": "authors:8q8bn-0kc22", "collection": "authors", "collection_id": "8q8bn-0kc22", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180724-131524018", "type": "book_section", "title": "Cryogenic germanium detectors for a weakly interactive massive particle (WIMP) dark-matter search", "book_title": "EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V", "author": [ { "family_name": "Stockwell", "given_name": "W.", "clpid": "Stockwell-W" }, { "family_name": "Akerib", "given_name": "D.", "clpid": "Akerib-D-S" }, { "family_name": "Aubourg", "given_name": "\u00c9.", "clpid": "Aubourg-\u00c9" }, { "family_name": "Barnes", "given_name": "P. D., Jr.", "clpid": "Barnes-P-D-Jr" }, { "family_name": "Cummings", "given_name": "A.", "orcid": "0000-0002-3840-7696", "clpid": "Cummings-A-C" }, { "family_name": "Da Silva", "given_name": "A.", "clpid": "Da-Silva-A" }, { "family_name": "Emes", "given_name": "J.", "clpid": "Emes-J" }, { "family_name": "Golwala", "given_name": "S.", "orcid": "0000-0002-1098-7174", "clpid": "Golwala-S-R" }, { "family_name": "Haller", "given_name": "E. E.", "clpid": "Haller-E-E" }, { "family_name": "Margulies", "given_name": "S.", "clpid": "Margulies-S" }, { "family_name": "Pritychenko", "given_name": "B.", "clpid": "Pritychenko-B" }, { "family_name": "Ross", "given_name": "R. R.", "clpid": "Ross-R-R" }, { "family_name": "Sadoulet", "given_name": "B.", "clpid": "Sadoulet-B" }, { "family_name": "Shutt", "given_name": "T.", "clpid": "Shutt-T" }, { "family_name": "Smith", "given_name": "G.", "orcid": "0000-0003-4494-8277", "clpid": "Smith-Graham-P" }, { "family_name": "Taylor", "given_name": "J.", "clpid": "Taylor-J" }, { "family_name": "White", "given_name": "S.", "clpid": "White-S" }, { "family_name": "Young", "given_name": "B. A.", "clpid": "Young-B-A" } ], "contributor": [ { "family_name": "Siegmund", "given_name": "Oswald H. W.", "clpid": "Siegmund-O-H-W" }, { "family_name": "Vallerga", "given_name": "John V.", "clpid": "Vallerga-J-V" } ], "abstract": "We are preparing an experimental search for weakly interacting massive particle (WIMP) dark matter using cryogenic germanium detectors. These detectors measure both the ionization and phonons produced by particle interactions in the substrate. The ionization measurement uses low drift fields, approximately equals 1 V/cm. The phonon measurement is made using neutron transmutation doped (NTD) germanium thermistors. Simultaneous detection of phonons and ionization allows us to discriminate between electron-recoil and nuclear-recoil events which gives a powerful method for isolating possible WIMP events (nuclear recoils) from background gamma ray events (electron recoils). Recent work on our understanding and optimization of these detectors will be presented.", "doi": "10.1117/12.186825", "isbn": "9780819416049", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "1994-09-16", "pages": "374-381" } ]