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Combined non-inductive current drive in a high confinement reversed magnetic shear plasma at high normalized density in JT-60U

JT-60Uにおける高規格化密度領域での高閉じ込め負磁気シア放電での複合非誘導電流駆動

井手 俊介; 藤田 隆明; 鈴木 隆博; 波多江 仰紀; 内藤 磨; 鎌田 裕; 関 正美

Ide, Shunsuke; Fujita, Takaaki; Suzuki, Takahiro; Hatae, Takaki; Naito, Osamu; Kamada, Yutaka; Seki, Masami

グリーンワルド密度の82%の高密度領域でHモードスケーリングの1.4倍の閉じ込めを持った負磁気シア放電の完全非誘導電流駆動に、初めて成功した。完全非誘導電流駆動は、低域混成波と中性粒子ビームによる電流駆動を62%のブートストラップ割合を持つプラズマに行って実現した。異なる非誘導電流駆動を組み合わせることにより、高ブートストラップ負磁気シア放電における中心と周辺同時の電流分布を変えることに成功した。

Non-inductive full current drive (CD) in a reversed magnetic shear plasma (RS) with high energy confinement of 1.4 times the H-mode scaling at 82% of the Greenwald density has been achieved simultaneously for the first time in a tokamak; these results were obtained in the JT-60U tokamak. The full-CD state was realized by a combination of waves in the lower hybrid range of frequency and neutral beam injection together with high bootstrap current fraction ($$f_{rm bs}$$) of 62% to the total plasma current. The combination has demonstrated for the first time active current profile modification in a high $$f_{rm bs}$$ RS plasma both in the core and in peripheral regions.

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パーセンタイル:66.13

分野:Physics, Fluids & Plasmas

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