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Self-organization of plasma turbulence

プラズマ乱流の自己組織化

井戸村 泰宏   

Idomura, Yasuhiro

核融合プラズマ乱流はしばしば帯状流のような自己組織化乱流構造を示す。この現象は長谷川-三間(H-M)方程式によって記述される自己組織化描像との類推によって議論されてきた。H-M方程式は乱流スペクトルの双カスケード、Rhinesスケール、断熱応答スケールといったいくつかの重要な特徴を予測するが、これまでにこれらの基礎的な特徴は核融合プラズマ乱流で検証されていない。本講演では電子温度勾配駆動乱流の自己組織化を示し、これらの基礎的な特徴を検証するとともに、その乱流輸送への影響を議論する。

Fusion plasma turbulence often shows self-organized turbulent structures such as zonal flows. This phenomenon has been is discussed by analogy with a self-organization picture described by the Hasegawa-Mima (H-M) equation. Although the H-M equation predicts several important features such as the dual cascade of turbulent spectra, the Rhines scale, and the adiabatic response scale, these basic features have not examined in fusion plasma turbulence so far. In this talk, we present the self-organization of electron temperature gradient driven turbulence, examine these basic features, and discuss their impact on turbulent transport.

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