DocumentCode :
1011004
Title :
Aperture lens formula corrected for space charge in the electron stream
Author :
Birdsall, Charles K.
Author_Institution :
General Electric Microwave Lab., Palo Alto, Calif.
Volume :
4
Issue :
2
fYear :
1957
fDate :
4/1/1957 12:00:00 AM
Firstpage :
132
Lastpage :
134
Abstract :
The aperture lens formula of Davisson and Calbick is rederived to include the effect of space charge forces. The correction is applied to a parallel flow Pierce gun, leading to the focal length reduction as a function of perveance, e.g., 30 per cent reduction at perveance 3 × 10-6.
Keywords :
Apertures; Cathodes; Cities and towns; Electric variables measurement; Electron beams; Electron devices; Electron guns; Electrons; Fluid flow measurement; Gaussian processes; Length measurement; Lenses; Solids; Space charge; Velocity measurement;
fLanguage :
English
Journal_Title :
Electron Devices, IRE Transactions on
Publisher :
ieee
ISSN :
0096-2430
Type :
jour
DOI :
10.1109/T-ED.1957.14215
Filename :
1472194
Link To Document :
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