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Enhanced particle transport caused by resonant magnetic perturbations in the J-TEXT tokamak

Qiming Hu, Ge Zhuang, Q. Yu, Bo Rao, Li Gao, Nengchao Wang, Wei Jin, Bin Yi, Wubing Zeng, Wei Chen2014年被引用 15Nuclear FusionIF 3出版社

The effect of resonant magnetic perturbations (RMPs) on particle transport is studied in the J-TEXT tokamak. It is found that for the discharges with an existing saturated 2/1 resistive tearing mode (TM), applied RMPs of moderate amplitude lead to a decrease in electron density with a relative amplitude ranging from −3% to −10% in the plasma core, and the mode stabilization and electron temperature increase are observed simultaneously in this case. Sufficiently large amplitude of RMPs, however, leads to locked modes and much larger decrease in the electron density as well as in the electron temperature, with . For the discharges without 2/1 TMs, applied RMPs cause a relative density decrease (−30%) before (after) field penetration. Using the two-fluid equations and experimental parameters as input, the nonlinear numerical results approximately agree with experimental observations.

日本語訳

J-TEXTトカマクにおいて、共鳴磁気摂動(RMP)が粒子輸送に及ぼす影響を研究した。既存の飽和した2/1抵抗性テアリングモード(TM)を有する放電では、中程度の振幅のRMPを印加すると、プラズマコアにおける電子密度の相対振幅が−3%から−10%の範囲で減少し、同時にモードの安定化と電子温度の上昇が観測されることがわかった。しかし、RMPの振幅が十分に大きい場合、ロックモードが発生し、電子密度および電子温度の減少がはるかに大きくなる(with .)。2/1 TMを有さない放電では、RMPの印加により、磁場の浸透前(後)に相対密度減少 (−30%)が生じる。二流体方程式と実験パラメータを入力として用いた非線形数値計算の結果は、実験観測とおおよそ一致する。

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Magnetic perturbationResonant magnetic perturbationTEXTParticle transportJ-TEXT
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