DocumentCode :
3219799
Title :
High efficiency linear C-band helix traveling wave tube
Author :
Chesnut, Merritt
Author_Institution :
Commun. & Power Industries, Palo Alto, CA, USA
fYear :
2004
fDate :
27-29 April 2004
Firstpage :
291
Abstract :
Summary form only given. This paper describes the development and performance of a C-band helix traveling wave tube. A new high efficiency collector was developed that employs elaborate electrode processing to reduce the secondary electron emission ratio, advanced asymmetrical electrode geometry, transverse magnetic flux threading and a short refocusing section. Fewer secondary electrons are generated and more electrons stay in the collector, reducing helix or body current. Limiting input drive so the power output stays within the linear operating range of the TWT and avoids the near saturation region reduces both the spread and the mean of the velocity distribution in the electron beam. Capturing this beam with the new high efficiency collector mentioned above has enabled higher levels of collector depression than have been previously obtainable. The result is a TWT that is more efficient, is easier to cool and has lower annual operating energy costs.
Keywords :
cathodes; electron beam focusing; microwave tubes; secondary electron emission; travelling wave tubes; C-band helix traveling wave tube; TWT linear operating range; asymmetrical electrode geometry; body current; collector depression; electron beam velocity distribution; helix current; high efficiency collector; high efficiency linear TWT; secondary electron emission ratio reduction; short refocusing section; transverse magnetic flux threading; Cooling; Costs; Drives; Electrodes; Electrons; Frequency measurement; Power industry; Power measurement; Radio frequency; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International
Print_ISBN :
0-7803-8261-7
Type :
conf
DOI :
10.1109/IVELEC.2004.1316322
Filename :
1316322
Link To Document :
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