A high−voltage telefocus electron gun with remote focusing
1975; American Institute of Physics; Volume: 46; Issue: 1 Linguagem: Inglês
10.1063/1.1134033
ISSN1527-2400
AutoresH. Schmoranzer, H. Wellenstein, R. A. Bonham,
Tópico(s)Electron and X-Ray Spectroscopy Techniques
ResumoA new design for a telefocus electron gun is presented. Features include a nearly constant minimum FWHM of 180 μ with beam currents of 1−400 μA at focal distances from 1/2 to 1 1/2 m. The gun is especially designed to operate under adverse vacuum conditions with background pressures as high as 10−4 Torr with accelerating potentials of 10 to 60 keV. In addition tn can be remotely focused and positioned from outside the vacuum chamber in which the gun is used.
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