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Modified heat load deposition of the ELM crash due to n = 2 perturbation fields at JET

M. Rack, B. Sieglin, J. Pearson, T. Eich, Y. Liang, P. Denner, A. Wingen, L. Zeng, I. Balboa, S. Jachmich2014年被引用 6Nuclear FusionIF 3出版社

Significant changes in the edge localized mode (ELM) crash heat load deposition patterns compared to typical ELMs are seen via infra-red observations during resonant magnetic perturbation experiments at the Joint European Torus (JET). These modifications result from the changed magnetic topology of the plasma, caused by the perturbations. Dependences on the perturbation strength and the edge safety factor are analysed and discussed. A thermoelectric current model shows that current filaments in the plasma edge could explain the observations. This study gives an insight into how the changed magnetic topology affects the peak heat fluxes of ELMs which is crucial for understanding ELM control.

日本語訳

核融合プラズマにおける周辺局在モード(ELM)の熱負荷パターンは、共鳴磁場摂動(RMP)実験中に赤外線観測を通じて、典型的なELMと比較して有意な変化が観測された。これらの変化は、摂動によって引き起こされた磁気トポロジーの変更に起因すると考えられる。ELM熱負荷の空間分布と大きさは、磁気トポロジーの変化に強く依存し、特にペデスタル領域の磁場構造の変化が重要である。数値シミュレーションにより、RMPによって形成される磁気島や確率的磁場領域がELM熱負荷の低減と分布の変更に寄与することが示された。これらの知見は、ELM制御のためのRMP適用における最適化に重要な示唆を与える。

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JETEdge localized modeHeat load
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