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Interplay between edge and outer core fluctuations in the tokamak Tore Supra

C. Fenzi, X. Garbet, A. Truc, H. Capes, P. Devynck, F. Gervais, P. Hennequin, C. Laviron, A. Quéméneur2000年被引用 6Nuclear FusionIF 3出版社

In the tokamak Tore Supra, when a poloidally and toroidally localized limiter, called a modular limiter, is introduced into the lower part of the scrape-off layer, density fluctuations located in the vicinity of this limiter present a specific feature with the appearance of a new spectral pattern in the associated frequency spectrum. This leads to a strong up-down asymmetry observed in both the plasma edge and the plasma outer core, with a maximum level of turbulence at the bottom of the plasma. The observed asymmetry characteristics show that magnetic connection lengths play a critical role here and that the limiter configuration has some effect on the outer core turbulence.

日本語訳

トカマク型Tore Supraにおいて、ポロイダル方向およびトロイダル方向に局在化したリミター(モジュラーリミターと呼ばれる)をスクレイプオフ層の下部に導入すると、このリミター近傍に位置する密度揺動は、関連する周波数スペクトルにおける新たなスペクトルパターンの出現という特徴を示す。これにより、プラズマ周辺部およびプラズマ外部コア領域の両方において、上下非対称性が強く観測され、プラズマ底部で乱流が最大レベルに達する。観測された非対称性の特性は、磁気結合長がここで決定的な役割を果たし、リミターの配置が外部コア領域の乱流に何らかの影響を及ぼすことを示している。

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Tore Supra
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