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Rotation dependent ion fluxes in front of resonant magnetic perturbation coils

H. Stoschus, M. Lehnen, O. Schmitz, D. Reiser, B. Unterberg, U. Samm, the TEXTOR Research Team2013年被引用 7Nuclear FusionIF 3出版社

Ion fluxes to the first wall of TEXTOR are modulated during application of a fast rotating resonant magnetic perturbation (RMP) field. The modulation in front of the RMP coils matches the magnetic topology modelled in vacuum approximation for low relative rotation of frel = −0.2 kHz between the RMP field and toroidal plasma rotation. With increasing relative rotation, the ion flux pattern is shifted linearly in counter-Bt direction. The shift is correlated to a displacement Δφ = π/2 of the electron density modulation at the outermost resonant flux surface caused by an internal plasma response. This indicates a competition between the near magnetic field of the RMP coils and the net magnetic field at the resonant flux surface.

日本語訳

TEXTORの第一壁へのイオン束は、高速回転する共鳴磁場摂動(RMP)の印加中に変調される。RMPコイルの前方での変調は、RMP場とトロイダルプラズマ回転との間の相対回転が低い場合、すなわちfrel = −0.2 kHzの場合に、真空近似でモデル化された磁場トポロジーと一致する。相対回転が増加するにつれて、イオン束パターンは反Bt方向に線形的にシフトする。このシフトは、内部プラズマ応答によって引き起こされる最外側共鳴磁気面における電子密度変調の変位Δφ = π/2と相関する。これは、RMPコイルの近接磁場と共鳴磁気面における正味の磁場との間の競合を示している。

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Magnetic perturbationResonant magnetic perturbation
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