Development and preparation for JT-60SA ECH system

Moriyama, Shinichi; Kobayashi, Takayuki; Sawahata, Masayuki; Terakado, Masayuki; Hiranai, Shinichi; Wada, Kenji; Sato, Yoshikatsu; Hinata, Jun; Yokokura, Kenji; Hoshino, Katsumichi; Takahashi, Koji; Kajiwara, Ken; Oda, Yasuhisa; Ikeda, Ryosuke; Isayama, Akihiko; Sakamoto, Keishi

Long pulse operation of the dual frequency gyrotron was started for JT-60SA ECH system. Pulse length of 2 s at 0.4 MW output, and 1 s at 0.7 MW were obtained at both 110 GHz and 138 GHz, so far. Typical oscillation efficiency is about 30%. Diffraction loss was acceptable for long pulse 1 MW output. The first high power test of the "power and beam profile monitor" featuring a fast movable Si $_{3}$ N $_{4}$ disk in the waveguide slit was successfully demonstrated.

Language	:	English
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Meeting title	:	Workshop on RF Heating Technology of Fusion Plasmas 2013
Held date	:	2013/09
Location (city)	:	Speyer
Location (country)	:	Germany
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Keywords	:	no keyword
Research Facility	:	JT-60(臨界プラズマ試験装置)
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Registration No. : BB20131306
JAEA Abstracts No. :
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