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Modelling of plasma response to resonant magnetic perturbation fields in MAST and ITER

Yueqiang Liu, A. Kirk, Y. Gribov, M.P. Gryaznevich, T.C. Hender, E. Nardon2011年被引用 137Nuclear FusionIF 3出版社

The resonant magnetic perturbation (RMP) fields, including the plasma response, are computed within a linear, full toroidal, single-fluid resistive magnetohydrodynamic (MHD) model, and under realistic plasma conditions for MAST and ITER. The response field is found to be considerably reduced, compared with the vacuum field produced by the magnetic perturbation coils. This field reduction relies strongly on the screening effect from the toroidal plasma rotation. Computations also quantify three-dimensional (3D) distortions of the plasma surface, caused by RMP fields. A correlation is found between the computed mode structures, the plasma surface displacement and the observed density pump-out effect in MAST experiments. Generally, the density pump-out tends to occur when the surface displacement peaks near the X-points.

日本語訳

共鳴磁場摂動(RMP)場は、プラズマ応答を含めて、線形・完全トロイダル・単一流体抵抗性磁気流体力学(MHD)モデル内で、かつMASTおよびITERの現実的なプラズマ条件下で計算される。応答場は、磁場摂動コイルによって生成される真空場と比較して、かなり低減されることが見出された。この場の低減は、トロイダルプラズマ回転によるスクリーニング効果に強く依存する。計算により、RMP場によって引き起こされるプラズマ表面の三次元(3D)変形も定量化される。MAST実験において、計算されたモード構造とプラズマ表面変位と、観測された密度ポンプアウト効果との間に相関が見出された。一般に、密度ポンプアウトは、表面変位がX点付近でピークに達するときに発生する傾向がある。

装置

iter高精度(タイトル一致)mast高精度(タイトル一致)

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ITERMagnetic perturbationResonant magnetic perturbationMAST
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