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Sheared flow generation and mode suppression in a magnetized linear cylindrical plasma

H Tsuchiya, S-I Itoh, A Fujisawa, K Kamataki, S Shinohara, M Yagi, Y Kawai, A Komori, K Itoh2008年Plasma Physics and Controlled FusionIF 2.2出版社

In a magnetized cylindrical plasma produced with the electron cyclotron resonance (ECR) scheme, a sheared E × B-flow showing zonal flow (ZF) characteristics has been driven by ECR power modulation. This method was used to control the sheared flow, and allowed us to observe that a coherent mode (spontaneously driven in the plasma) becomes stabilized as the induced plasma flow amplitude increases. The stabilization of the mode is caused by the increase in the plasma flow shear; thus, the result demonstrates the fundamental process of the shearing effect of ZFs on turbulence, which is commonly observed in toroidal plasma confinement devices for fusion research.

日本語訳

電子サイクロトロン共鳴(ECR)方式で生成された磁化円筒プラズマにおいて、ECRパワー変調により帯状流(ZF)特性を示すシアを有するE × B流が駆動された。この手法を用いてシア流を制御し、誘起されたプラズマ流の振幅が増大するにつれて、プラズマ中に自発的に駆動されるコヒーレントモードが安定化されることを観測することができた。このモードの安定化はプラズマ流のシアの増大によって引き起こされる。したがって、この結果は、核融合研究用のトロイダルプラズマ閉じ込め装置において一般的に観測される、乱流に対する帯状流のシア効果の基本過程を実証するものである。

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