A high−voltage telefocus electron gun with remote focusing
- 1 January 1975
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 46 (1) , 89-91
- https://doi.org/10.1063/1.1134033
Abstract
A 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.Keywords
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