Phd records
https://feeds.library.caltech.edu/people/Munro-George-Clarkson/Phd.rss
A Caltech Library Repository Feedhttp://www.rssboard.org/rss-specificationpython-feedgenenWed, 31 Jan 2024 19:29:59 +0000The Theory of the Modified Aston-Type Mass-Spectrometer
https://resolver.caltech.edu/CaltechTHESIS:02282017-085047751
Authors: {'items': [{'id': 'Munro-George-Clarkson', 'name': {'family': 'Munro', 'given': 'George Clarkson'}, 'show_email': 'NO'}]}
Year: 1933
DOI: 10.7907/2X6A-V938
The theory of an Aston-type mass-spectrometer using a
cylindrical condenser and bringing all ions of the same
specific mass to a point focus by variation of the magnetic
field alone is developed. The theory of the motion of an
ion in an inverse first-power electrostatic field is studied
under the particular set of conditions where all ions
regardless of their energy enter the condenser normal to its
leading edge and at the median position in the gap. Taylor
series expressions have been obtained which give the exit
position, the square of the exit velocity, and the tangent
of the angle of deflection in the field. The existence,
uniqueness, continuity, and uniform convergence of these
series solutions are established. The equation of the family
of straight lines which the ions follow beyond the electrostatic
field and before the magnetic field are obtained. The
existence, location, and width of a virtual source are
established for this system under the above conditions of
collimation. Expressions for the coordinates of the faces of
the magnetic pole pieces are obtained for the case where the
leading and trailing faces are mirror images of one another,
in the line containing the centers of curvature of the paths
of the ions in the magnetic field. The maximum mass-resolution
is obtained for a magnetic deflection of about one radian when
the electric deflection is one fourth of a radian. A study
is made of the corrections for various edge effects in the
magnetic field. Tables are given of the numerical results
of this investigation.https://thesis.library.caltech.edu/id/eprint/10070