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Observations of secondary structures after collapse events occurring at the q = 2 magnetic surface in the TEXTOR tokamak

Y. Liang, H.R. Koslowski, A. Krämer-Flecken, O. Zimmermann, K. Löwenbrück, G. Bertschinger, R.C. Wolf, the TEXTOR-team2007年被引用 23Nuclear FusionIF 3出版社

Collapse events at the q = 2 surface occurring during the mode locking process of an m/n = 2/1 tearing mode have been observed on TEXTOR. The plasma confinement within the q = 2 surface collapses without much influence on the width of the island (O-point). With an external rotating resonant magnetic perturbation (RMP) field induced by the dynamic ergodic divertor, secondary structures moving near the separatrix of the primary large 2/1 island with the same frequency as the RMP have been observed after the collapse events. The plasma confinement recovers when the secondary structures vanish.

日本語訳

TEXTORにおいて、m/n = 2/1テアリングモードのモードロッキング過程で発生するq = 2有理面上での崩壊現象が観測された。q = 2有理面内のプラズマ閉じ込めは、アイランド(O点)の幅に大きな影響を与えることなく崩壊する。動的エルゴディックダイバータによって誘起される外部回転共鳴磁場摂動(RMP)により、崩壊現象の後、主たる大きな2/1アイランドのセパラトリックス近傍をRMPと同じ周波数で移動する二次構造が観測された。二次構造が消滅すると、プラズマ閉じ込めは回復する。

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