DocumentCode :
3555483
Title :
A gyro-TWT with a space-charged limited gun
Author :
Ferguson, P.E. ; Symons, R.S.
Author_Institution :
Varian Associates, Inc., Palo Alto, CA
Volume :
27
fYear :
1981
fDate :
1981
Firstpage :
198
Lastpage :
201
Abstract :
Most gyrotron traveling wave tubes (gyro-TWT) currently employ temperature-limited magnetron-injection electron guns to produce electron beams with high perpendicular to parallel velocity ratios. Certain problems with these guns have inspired the investigation of alternative space-charge-limited guns. An improved design technique applied to the helical transverse, magnetic "wiggler" employed in early cyclotron maser experiments shows promise for high power operation. A previously reported C-band gyro-TWT has been modified. The magnetron injection gun has been replaced with a Pierce-type electron gun. A bifilar helix of prescribed length capable of producing a helically varying transverse magnetic field for converting axial electron energy into transverse electron energy of low energy spread was placed between the Pierce gun and the rf interaction circuit. The rf interaction circuit was not changed. Substantial output power was achieved. Comparison of initial experimental results with previous results using the magnetron injection gun are presented.
Keywords :
Cyclotrons; Electron beams; Electron guns; Electron tubes; Gyrotrons; Magnetic circuits; Magnetic fields; Masers; Power generation; Undulators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electron Devices Meeting, 1981 International
Type :
conf
DOI :
10.1109/IEDM.1981.190040
Filename :
1481993
Link To Document :
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