DocumentCode :
1557641
Title :
A novel 4.5-MW electron gun for a coaxial cavity gyrotron
Author :
Piosczyk, Bernhard
Author_Institution :
Inst. fur Hochleistungsimpuls- und Mikrowellentechnik, Forschungszentrurn Karlsruhe, Germany
Volume :
48
Issue :
12
fYear :
2001
fDate :
12/1/2001 12:00:00 AM
Firstpage :
2938
Lastpage :
2944
Abstract :
A novel 4.5-MW (90 kV, 50 A) electron gun for a 165-GHz coaxial cavity gyrotron operated in the transverse electric mode TE31, 3.7 has been designed, fabricated, and operated in a gyrotron. The electrons are extracted toward the anode as in a conventional magnetron injection gun (MIG) and not toward the coaxial insert as in the previously used so-called inverse gun. The main advantage of this arrangement is the reduced overall radial size which becomes comparable to the size of a conventional gun with the same diameter of the emitter. The design and the technology of the electron gun fulfil the requirements for a high-power gyrotron operated at long pulses up to continuous wave. The coaxial insert is fully cooled and can be adjusted when the tube is completely assembled. The amplitude of mechanical vibrations has been measured to be less than 0.03 mm under operating conditions. This is sufficiently small for stable long-pulse operation. In operation at short pulses (ms) a microwave RF output power of 2.2 MW at 165 GHz has been obtained with a beam current of 84 A. The best operating conditions have been observed with an intermediate type of electron flow
Keywords :
electron guns; gyrotrons; 165 GHz; 4.5 MW; 50 A; 90 kV; beam current; coaxial cavity gyrotron; continuous-wave operation; electron flow; electron gun; high-power operation; long-pulse operation; magnetron injection gun; mechanical vibration; microwave RF output power; transverse electric mode; Anodes; Assembly; Coaxial components; Electrons; Gyrotrons; Mechanical variables measurement; Power generation; Radio frequency; Tellurium; Vibration measurement;
fLanguage :
English
Journal_Title :
Electron Devices, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9383
Type :
jour
DOI :
10.1109/16.974732
Filename :
974732
Link To Document :
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