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Response of plasma rotation to resonant magnetic perturbations in J-TEXT tokamak

W Yan, Z Y Chen, D W Huang, Q M Hu, Y J Shi, Y H Ding, Z F Cheng, Z J Yang, X M Pan, S G Lee2018年Plasma Physics and Controlled FusionIF 2.2出版社

The response of plasma toroidal rotation to the external resonant magnetic perturbations (RMP) has been investigated in Joint Texas Experimental Tokamak (J-TEXT) ohmic heating plasmas. For the J-TEXT's plasmas without the application of RMP, the core toroidal rotation is in the counter-current direction while the edge rotation is near zero or slightly in the co-current direction. Both static RMP experiments and rotating RMP experiments have been applied to investigate the plasma toroidal rotation. The core toroidal rotation decreases to lower level with static RMP. At the same time, the edge rotation can spin to more than 20 km s−1 in co-current direction. On the other hand, the core plasma rotation can be slowed down or be accelerated with the rotating RMP. When the rotating RMP frequency is higher than mode frequency, the plasma rotation can be accelerated to the rotating RMP frequency. The plasma confinement is improved with high frequency rotating RMP. The plasma rotation is decelerated to the rotating RMP frequency when the rotating RMP frequency is lower than the mode frequency. The plasma confinement also degrades with low frequency rotating RMP.

日本語訳

プラズマのトロイダル回転に対する外部共鳴磁気摂動(RMP)の応答が、J-TEXTオーミック加熱プラズマにおいて調査された。RMPを印加しないJ-TEXTプラズマでは、コア領域のトロイダル回転はカウンター方向であり、エッジ領域の回転はほぼゼロかわずかにコ方向であった。プラズマのトロイダル回転に対する影響を調べるため、静的RMP実験と回転RMP実験の両方が適用された。静的RMPにより、コア領域のトロイダル回転はより低いレベルに減少した。同時に、エッジ領域の回転はコ方向に毎秒20km以上までスピンアップし得る。一方、回転RMPにより、コアプラズマの回転は減速または加速され得る。回転RMPの周波数がモード周波数より高い場合、プラズマ回転は回転RMPの周波数まで加速され得る。高周波数の回転RMPによりプラズマ閉じ込めは改善された。回転RMPの周波数がモード周波数より低い場合、プラズマ回転は回転RMPの周波数まで減速される。低周波数の回転RMPによりプラズマ閉じ込めも劣化した。

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Magnetic perturbationResonant magnetic perturbationTEXTJ-TEXTPlasma rotation
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