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Local measurements of screening currents driven by applied RMPs on TEXTOR

P. Denner, Y. Liang, Y. Yang, M. Rack, L. Zeng, J. Pearson, Y. Xu, the TEXTOR Team2014年被引用 7Nuclear FusionIF 3出版社

In order to understand the mechanism by which resonant magnetic perturbations (RMPs) mitigate or suppress edge-localized modes, it is necessary to understand the plasma response to the application of RMPs. TEXTOR's fast movable Mirnov probe can provide direct measurements of the plasma response to RMPs applied using the dynamic ergodic divertor. The effect of toroidal plasma rotation is investigated, and a change in the phase of the plasma response at certain values of rotation is found. Jumps in the phase of the magnetic field are found to occur on resonant surfaces, indicating the formation of screening currents on these surfaces. The first observations of screening currents on multiple surfaces are presented, and the transition from screening to field penetration with increasing strength of the applied RMP field is observed.

日本語訳

共鳴磁場摂動(RMP)が周辺局在モードを緩和または抑制するメカニズムを理解するためには、RMPの印加に対するプラズマ応答を理解することが必要である。TEXTORの高速可動ミルノフプローブは、動的エルゴディックダイバータを用いて印加されたRMPに対するプラズマ応答の直接測定を提供することができる。トロイダルプラズマ回転の効果が調査され、特定の回転値においてプラズマ応答の位相の変化が見いだされた。磁場の位相の跳びが共鳴面で発生することが見いだされ、これらの面上での遮蔽電流の形成を示している。複数の面上での遮蔽電流の最初の観測が提示され、印加されたRMP場の強度の増加に伴う遮蔽から磁場浸透への遷移が観測された。

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