DocumentCode
1216093
Title
A Figure of Merit for Electron-Concentrating Systems
Author
Pierce, J.R.
Author_Institution
Bell Telephone Laboratories, Inc., New York, N.Y.
Volume
33
Issue
7
fYear
1945
fDate
7/1/1945 12:00:00 AM
Firstpage
476
Lastpage
478
Abstract
Electron-concentrating systems are subject to certain limitations because of the thermal velocities of electrons leaving the cathode. A figure of merit is proposed for measuring the goodness of a device in this respect. This figure of merit is the ratio of the area of the aperture which, in an ideal system with the same important parameters as the actual system, would pass a given fraction of the cathode current to the area of the aperture which in the actual system does pass this fraction of the cathode current. Expressions are given for evaluating this figure of merit.
Keywords
Apertures; Area measurement; Capacitance; Cathodes; Current density; Current measurement; Frequency; Magneto electrical resistivity imaging technique; Nonlinear equations; Size measurement;
fLanguage
English
Journal_Title
Proceedings of the IRE
Publisher
ieee
ISSN
0096-8390
Type
jour
DOI
10.1109/JRPROC.1945.230224
Filename
1696887
Link To Document