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Correlation length scaling laws in drift-Alfvén edge turbulence computations

S Konzett, D Reiser, A Kendl2012年Plasma Physics and Controlled FusionIF 2.2出版社

The effect of changes in plasma parameters, that are characteristic near or at an L–H transition in fusion edge plasmas, on fluctuation correlation lengths are analysed by means of drift-Alfvén turbulence computations. Scalings by density gradient length, collisionality, plasma beta and by an imposed shear flow are considered. It is found that strongly sheared flows lead to the appearance of long-range correlations in electrostatic potential fluctuations parallel and perpendicular to the magnetic field.

日本語訳

プラズマパラメータの変化が、核融合周辺プラズマにおけるL-H遷移近傍または遷移時に特徴的な変動の相関長に及ぼす影響を、ドリフト・アルヴェン乱流計算により解析した。密度勾配長、衝突頻度、プラズマベータ、および外部印加せん断流によるスケーリングを検討した。その結果、強いせん断流は、磁場に平行および垂直な静電ポテンシャル変動において長距離相関の出現を引き起こすことが見出された。

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Alfvén waveEdge turbulence
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