Title :
Performance characteristics of a high-power X-band two-cavity gyroklystron
Author :
Lawson, Wes ; Calame, J.P. ; Hogan, Bartholomew P. ; Skopec, Marlene ; Striffler, Charles D. ; Granatstein, Victor L.
Author_Institution :
Lab. for Plasma Res., Maryland Univ., College Park, MD, USA
fDate :
6/1/1992 12:00:00 AM
Abstract :
The operating characteristics of a two-cavity X-band gyroklystron experiment are reported. Beam voltages and currents up to 440 kV and 200 A, respectively, are generated in 1 μs pulses by a thermionic magnetron injection gun. Velocity ratios (ν⊥ /νz) near one in the output cavity are used to achieve peak powers of 24 MW near 9.87 GHz. The maximum saturated efficiency of more than 33% occurs at a beam voltage of 425 kV and a current of 150 A. A large signal gain in excess of 34 dB is realized by operating the input cavity just below the start oscillation threshold. Details of tube stability and the dependence of amplification on magnetic field profile, input signal parameters, and various beam quantities are presented
Keywords :
cavity resonators; gyrotrons; klystrons; microwave amplifiers; 150 A; 200 A; 24 MW; 33 percent; 34 dB; 425 kV; 440 kV; 9.87 GHz; X-band two-cavity gyroklystron; amplification; beam current; beam voltage; high power; input cavity; input signal parameters; large signal gain; magnetic field profile; maximum saturated efficiency; operating characteristics; output cavity; peak powers; start oscillation threshold; thermionic magnetron injection gun; tube stability; Cathodes; Costs; Frequency estimation; Klystrons; Laser beams; Linear accelerators; Pulse amplifiers; Pulse modulation; Radio frequency; Radiofrequency amplifiers;
Journal_Title :
Plasma Science, IEEE Transactions on
