Electron gun for brightness

Details Electron gun for brightness Electron gun for brightness

1985-04-22

1986-05-27

Sikes, William L.

Electric lamp and discharge devices

Electrode and shield structures

Point source cathodes

313346R, H01J 116, H01J 1910

Patent

active

045917540

ABSTRACT:
An electron gun for high brightness including a LaB.sub.6 single crystal cathode having a (100) plane on at least part of a main electron beam emission surface of a cathode tip having a top and a Wehnelt having a tapered surface defining an interior angle similar to or greater than a vertical angle of said cathode tip.

REFERENCES:
patent: 4054946 (1977-10-01), Ferris et al.
patent: 4055780 (1977-10-01), Kawai et al.
Introduction to Electron Beam Technology, Ed. by R. Bakish (Wiley, 1962) p. 270.
Electron and Ion Beam Science and Technology (Proceedings of the First International Conference), Ed. by R. Bakish (Wiley, 1965) p. 119.
A Pierce Description of the Travelling Wave Gyrotron, by A. J. Sangster (Vacuum, Nov./Dec. 1980, vol. 30, p. 466).
Energy Distribution, Intensity Modulation and Emittance of the Beam Extracted from a Duopigatron Source, by J. P. Grandchamp, et al (Vacuum, Jan./Feb. 1984, vol. 34, p. 68).
Japanese Journal of Applied Physics, Letters, Bd. 19, 1980, Nr. 9, S.L537-L540.

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