High power and long pulse experiments of ITER gyrotron

Ikeda, Ryosuke; Oda, Yasuhisa; Kajiwara, Ken; Takahashi, Koji; Kobayashi, Takayuki; Moriyama, Shinichi; Sakamoto, Keishi

Long pulse gyrotrons for ITER are under development. At present, output power of 1.2 MW for 2 s pulse operation and long pulse operation of 1000 s at 0.5 MW were achieved in experiments of TE31,11 mode gyrotron. Moreover, a transmission efficiency of 91% was obtained in 40 m transmission experiment. Recently, development of TE31,9 mode gyrotron was started. 1 MW with oscillation efficiency of 33% was realized in 1 ms operation without depressed collector voltage. And, 0.61 MW with total electric efficiency 51 % was achieved in 10 s operation with depressed collector voltage.

Language	:	English
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Meeting title	:	Plasma Conference 2014 (PLASMA 2014)
Held date	:	2014/11
Location (city)	:	Niigata
Location (country)	:	Japan
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Keywords	:	no keyword
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Registration No. : BB20141301
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