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Study of Sub-Terahertz high power gyrotron for ECH&CD system of DEMO

原型炉用電子サイクロトロン加熱電流駆動システムに向けた大電力サブテラヘルツジャイロトロンの研究

坂本 慶司; 假家 強*; 小田 靖久; 南 龍太郎*; 池田 亮介; 梶原 健; 小林 貴之; 高橋 幸司; 森山 伸一; 今井 剛*

Sakamoto, Keishi; Kariya, Tsuyoshi*; Oda, Yasuhisa; Minami, Ryutaro*; Ikeda, Ryosuke; Kajiwara, Ken; Kobayashi, Takayuki; Takahashi, Koji; Moriyama, Shinichi; Imai, Tsuyoshi*

For the Electron cyclotron resonance heating and current drive system on DEMO reactor, the mm-wave of more than 200 GHz is expected. To increase the gyrotron frequency, extremely high-order oscillation mode should be adopted to suppress the Ohmic loss on the resonator wall to less than $$sim$$20 MW/m$$^{2}$$. Here, we designed and fabricated a 300 GHz gyrotron of TE32,18 mode oscillation and started a short pulse experiment to investigate the oscillation characteristics of the high order mode at $$sim$$300 GHz. As a preliminary result, we demonstrated the power generation of $$sim$$0.5 MW at $$sim$$300 GHz oscillation at the oscillation mode of TE32,18, and other modes.

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