DocumentCode :
1028142
Title :
The effect of drift length, beam radius, and perveance on klystron power conversion efficiency
Author :
Mihran, Theodore G.
Author_Institution :
General Electric Company, Schenectady, N. Y.
Volume :
14
Issue :
4
fYear :
1967
fDate :
4/1/1967 12:00:00 AM
Firstpage :
201
Lastpage :
206
Abstract :
Current bunching calculations based on the disk electron model are used to determine the effect of drift length, beam radius, and beam perveance on the power conversion efficiency of a two-cavity klystron. In a 2.5 × 10-6perveance klystron, a loss in power output exceeding one decibel results when a drift length shorter than 0.08λqis used. Power conversion efficiency is found to be reduced by 5 to 10 points in beams where normalized beam radius \\gamma b lies in the range from 0.3 to 0.1. The loss of efficiency due to perveance in an optimum klystron design is found to be given approximately by the expression \\Delta _{\\eta}=0.0606 \\sqrt {\\mu}{P} , where Δηis expressed in percentage points, and \\mu P is the microperveance of the beam. In a 2.5 × 10-6perveance beam, the power conversion efficiency is reduced by ten percentage points from its ballistic value of 58.2 percent, indicating that previously published work is in error by a factor of two.
Keywords :
Computer errors; Electrons; Frequency; Helium; Humans; Klystrons; Particle beams; Plasma density; Plasma devices; Power conversion;
fLanguage :
English
Journal_Title :
Electron Devices, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9383
Type :
jour
DOI :
10.1109/T-ED.1967.15929
Filename :
1474652
Link To Document :
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