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An electrostatically and a magnetically confined electron gun lens systemFocal properties, electron trajectory calculations, and geometries are given for two electron 'gun' lens systems that have a variety of applications in, for example, electron-neutral and electron-ion scattering experiments. One nine-lens system utilizes only electrostatic confinement and is capable of focusing electrons onto a fixed target with extremely small divergence angles, over a range of final energies 1-790 eV. The second gun lens system is a simpler three-lens system suitable for use in a uniform, solenoidal magnetic field. While the focusing properties of such a magnetically confined lens systenm are simpler to deal with, the system does illustrate features of electron extraction and Brillouin flow that have not been suitably emphasized in the literature.
Document ID
19890032878
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bernius, Mark T.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Man, Kin F.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chutjian, Ara
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 14, 2013
Publication Date
November 1, 1988
Publication Information
Publication: Review of Scientific Instruments
Volume: 59
ISSN: 0034-6748
Subject Category
Electronics And Electrical Engineering
Accession Number
89A20249
Distribution Limits
Public
Copyright
Other

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