Real-time measurement and feedback control of ion temperature profile and toroidal rotation using fast CXRS system in JT-60U

Yoshida, Maiko; Sakamoto, Yoshiteru; Sueoka, Michiharu; Kawamata, Yoichi; Oyama, Naoyuki; Suzuki, Takahiro; Kamada, Yutaka; JT-60 Team

A fast charge exchange recombination spectroscopy (CXRS) system has been developed for the real-time measurement and feedback control of ion temperature ( $_{rm i}$ ) profile and toroidal rotation velocity ( $_{rm t}$ ) in JT-60U. In order to control $_{rm i}$ and $_{rm t}$ in real-time, the charge exchange recombination spectroscopy with high time resolution, the real-time processor system, and the real-time control system have been developed. Utilizing this system, real-time control of the $_{rm i}$ gradient has been demonstrated with neutral beams at high beta plasmas. The strength of the internal transport barrier is controlled. Moreover, the real-time control of $_{rm t}$ has been demonstrated from counter (anti parallel to the plasma current, $_{rm p}$ ) to co (parallel to the $_{rm p}$ ) direction.

Language	:	English
Journal	:	Fusion Engineering and Design
Volume	:	84
Number	:	12
Pages	:	p.2206 - 2213
Publication Year/Month	:	2009/12
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Paper URL	:	https://doi.org/10.1016/j.fusengdes.2009.04.006
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Keywords	:	no keyword
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Registration No. : AA20071128
JAEA Abstracts No. : 38000499
Paper Submission No. : 7060

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