Experimental studies of a high power, X-band, coaxial gyroklystron

Author

Cheng, J. ; Xu, Xiaoxi ; Lawson, Wesley J. ; Calame, J.P. ; Castle, M. ; Hogan, Bart P. ; Granatstein, Victor L. ; Nusinovich, Gregory S. ; Reiser, M.

Author_Institution

Naval Undersea Warefare Center, Newport, RI, USA

Volume

27

Issue

4

fYear

1999

fDate

8/1/1999 12:00:00 AM

Firstpage

1175

Lastpage

1187

Abstract

Gyroklystrons are possible candidates for the RF sources in future linear colliders. A two-cavity and a three-cavity X-band gyroklystrons have been designed, built, and tested on the new 100 MW test bed at the University of Maryland. The theoretical design of the three-cavity X-band gyroklystron called for a peak power of 96 MW at an efficiency near 40% at a frequency of 8.568 GHz. In experiments, peak output power in the range of 75-85 MW at a frequency of 8.6 GHz has been measured with the three-cavity gyroklystron tube. The three-cavity tube was operated at electron beam voltage and current of 470 kV and 500 A, respectively. The efficiency is approximately 32% and the gain is approximately 30 dB. The pulse width of the output power signal is 1.7 μs (full width at half maximum), while the pulse repetition rate was limited to 2 Hz in the proof-of-principle study. The paper details the design, performance, and diagnostics of these two X-band gyroklystrons operating at the fundamental cyclotron resonance

Keywords

cyclotron resonance; electron beam testing; gyrotrons; klystrons; microwave generation; microwave power amplifiers; microwave tubes; 100 MW; 2 Hz; 30 dB; 32 percent; 40 percent; 470 kV; 500 A; 75 to 85 MW; 8.568 GHz; 8.6 GHz; 96 MW; RF sources; University of Maryland; X-band gyroklystron; X-band gyroklystrons; design; diagnostics; efficiency; electron beam current; electron beam voltage; fundamental cyclotron resonance; gain; gyroklystron; high power X-band coaxial gyroklystron; linear colliders; output power signal; peak output power; peak power; performance; proof-of-principle study; pulse repetition rate; pulse width; test bed; testing; three cavity gyroklystron tube; three-cavity X-band gyroklystron; three-cavity tube; two-cavity X-band gyroklystron; Coaxial components; Electron beams; Electron tubes; Frequency measurement; Klystrons; Power generation; Power measurement; Radio frequency; Space vector pulse width modulation; Testing;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.782298

Filename

782298