Title :
Experimental studies of a 30 MW two-cavity second harmonic gyroklystron
Author :
Matthews, H.W. ; Lawson, W. ; Calame, J.P. ; Flaherty, M.K.E. ; Cheng, J. ; Hogan, B. ; Latham, P.E. ; Granatstein, V.L.
Author_Institution :
Lab. for Plasma Res., Maryland Univ., College Park, MD, USA
Abstract :
We report the operating characteristics of a sequence of two-cavity second harmonic K-band gyroklystrons. The TE/sub 011/ input cavity is driven near 9.88 GHz. The first four tubes utilized smooth transition output cavities which resonate at twice the drive frequency in the TE/sub 021/ mode. Peak powers in excess of 30 MW were achieved with efficiencies greater than 28% and large signal gains of 27 dB. The results of an abrupt transition complex TE/sub 01/, TE/sub 02/ mixed mode output cavity are also discussed, as well as the prospect of placing a coaxial insert into the highest power tube.<>
Keywords :
cavity resonators; gyrotrons; harmonics; klystrons; microwave amplifiers; power amplifiers; 27 dB; 28 percent; 30 MW; 9.88 GHz; K-band; SHF; TE/sub 01/ mode; TE/sub 011/ mode input cavity; TE/sub 02/ mode; TE/sub 021/ mode; coaxial insert; microwave tubes; mixed mode output cavity; operating characteristics; second harmonic gyroklystron; two-cavity second harmonic gyroklystron; Cyclotrons; Frequency; K-band; Klystrons; Magnetic circuits; Magnetic fields; Magnetic resonance; Magnetic separation; Pulse modulation; Voltage;
Conference_Titel :
Electron Devices Meeting, 1993. IEDM '93. Technical Digest., International
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-1450-6
DOI :
10.1109/IEDM.1993.347331
