Title :
Present status of a 17.1-GHz four-cavity frequency-doubling coaxial gyroklystron design
Author :
Yovchev, Ivailo G. ; Lawson, Wes G. ; Nusinovich, Gregory S. ; Granatstein, Victor L. ; Castle, Michael
Author_Institution :
Inst. for Plasma Res., Maryland Univ., College Park, MD, USA
fDate :
6/1/2000 12:00:00 AM
Abstract :
A design of a Ku-band 17.1-GHz four-cavity coaxial gyroklystron amplifier for driving future linear colliders is presented. The X-band input cavity operates in the TE0.11 mode, whereas the remaining three cavities (buncher, penultimate, and output) operate in the TE021 mode, doubling the frequency of the input signal. The electron beam parameters are the following: current of 540 A, voltage of 460 kV, perpendicular-to-parallel velocity ratio of 1.5, and a parallel velocity spread of 6.4%. The output cavity has been simulated as (1) zero-drive unstable with Q-factor of 320 and (2) zero-drive stable with Q-factor of 250. The simulations show that the maximum efficiency in the first case is 37.4%, and in the second one is 34.4%. In both cases, a high gain of 60 dB at a 100-MW output power level can be realized
Keywords :
cavity resonators; electron beams; gyrotrons; harmonic generation; klystrons; microwave generation; microwave power amplifiers; microwave tubes; 100 MW; 17.1 GHz; 34.4 percent; 37.4 percent; 460 kV; 540 A; 60 dB; Ku-band four-cavity coaxial gyroklystron amplifier; Q-factor; TE0.11 mode; TE021 mode; X-band input cavity; buncher cavity; current; design; electron beam parameters; four-cavity frequency-doubling coaxial gyroklystron design; frequency doubling; input signal; linear colliders; maximum efficiency; output cavity; output power level; parallel velocity spread; penultimate cavity; perpendicular-to-parallel velocity ratio; voltage; zero-drive stable cavity; zero-drive unstable cavity; Circuits; Coaxial components; Cyclotrons; Electron beams; Frequency; Klystrons; Power system harmonics; Pulse amplifiers; Tellurium; Voltage;
Journal_Title :
Plasma Science, IEEE Transactions on
