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Experimental investigation of the interaction of IBW and LHCD in the HT-7 tokamak

Baonian Wan, Yuejiang Shi, Guosheng Xu, Xianzu Gong, Yanping Zhao, Jiafang Shan, Junyu Zhao, Yubao Zhu, Jiangang Li, Guangli Kuang2004年被引用 21Nuclear FusionIF 3出版社

Experiments of simultaneous injection of LHWs and IBWs into plasmas have been conducted in the HT-7 tokamak. Evidence that IBW can control the plasma pressure profile was observed in LHCD plasmas. It was found that electron Landau damping (ELD) of IBWs occurred around the maxima of parallel refractive index, n||, and that the ion cyclotron resonant layer can enhance off-axis LHW power deposition and create a localized fast electron current channel. But the global LHCD efficiency during an IBW pulse was not improved obviously. As a result of the localization of LHCD during an IBW pulse, the global current density profile was modified, which was indicated by the internal inductance, li. Optimization of this operation mode utilizing the features of the interaction of IBWs and LHCD provides a new way of obtaining a high performance plasma under steady-state conditions.

日本語訳

HT-7トカマクにおいて、低域混成波(LHW)とイオンバーンスタイン波(IBW)の同時入射実験が実施された。LHCDプラズマにおいて、IBWがプラズマ圧力分布を制御できるという証拠が観測された。IBWの電子ランダウ減衰(ELD)が平行屈折率n||の最大値付近で発生し、イオンサイクロトロン共鳴層がLHWの電力堆積を強化し、局所的な高速電子電流を生成できることが見出された。しかし、IBWパルス中の全体的なLHCD効率は明らかに改善されなかった。IBWパルス中のLHCDの局所化の結果、全体的な電流密度分布が修正され、これは内部インダクタンスliによって示された。IBWとLHCDの相互作用の特徴を活用したこの運転モードの最適化は、定常状態条件下で高性能プラズマを得るための新たな手法を提供するものである。

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