Title :
Electron beam-cavity system of 170 GHz gyrotron for ITER
Author :
Zapevalov, V.E. ; Flyagin, V.A. ; Kuftin, A.N. ; Lygin, V.K. ; Moiseev, M.A. ; Zavolsky, N.A.
Author_Institution :
Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia
Abstract :
The opportunity of using TE/sub 28.7/, TE/sub 31.8/ and TE/sub 25.10/ operating modes for a CW 170 GHz/1 MW gyrotron for ITER is assessed. Parameters are optimized to achieve maximum efficiency of the gyrotron with an acceptable ohmic load on the cavity. Results of an experimental investigation of short pulse prototypes of the TE/sub 28.7/ and TE/sub 25.10/ gyrotrons are presented. Mauimum output power 1.4 MW, efficiency 36%, and 65% with single-stage depressed collector were achieved.
Keywords :
cavity resonators; electron beams; gyrotrons; millimetre wave tubes; numerical analysis; plasma radiofrequency heating; 1 to 1.4 MW; 170 GHz; 36 percent; 65 percent; CW gyrotron; EHF; ITER application; ITER plasma set-ups; MM-wave tube; TE/sub 25.10/ mode; TE/sub 28.7/ mode; TE/sub 31.8/ mode; cavity numerical simulation; electron beam-cavity system; maximum efficiency; megawatt gyrotron; parameters optimization; short pulse prototypes; single-stage depressed collector; Cathodes; Electron beams; Frequency; Guns; Gyrotrons; Numerical simulation; Physics; Power generation; Prototypes; Voltage;
Conference_Titel :
Infrared and Millimeter Waves, 2000. Conference Digest. 2000 25th International Conference on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-6513-5
DOI :
10.1109/ICIMW.2000.892922
