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Turbulent transport and structural transition in confined plasmas

Kimitaka Itoh, Sanae-I Itoh, Atsushi Fukuyama, Masatoshi Yagi1997年Plasma Physics and Controlled FusionIF 2.2出版社

The theory of far-nonequilibrium transport of plasmas is described. Analytic as well as simulation studies are developed. The subcritical nature of turbulence and the mechanism for self-sustaining are discussed. The transport coefficient is obtained. The pressure gradient is introduced as an order parameter, and the bifurcation from collisional to turbulent transport is shown. The generation of the electric field and its influence on the turbulent transport are analysed. The bifurcation of the radial electric field structure is addressed. Hysteresis appears in the flux-gradient relation. This bifurcation causes the multifold states in the plasma structure, driving the transition in the transport coefficient or the self-generating oscillations in the flux. The structural formation and dynamics of plasma profiles are explained.

日本語訳

非平衡遠方輸送のプラズマの理論について述べる。解析的およびシミュレーション的研究の両方を展開する。乱流の亜臨界的性質と自己維持機構について考察する。輸送係数を導出する。圧力勾配を秩序パラメータとして導入し、衝突輸送から乱流輸送への分岐を示す。電場の生成とその輸送への影響を解析する。径方向電場の分岐構造を明らかにする。フラックスと勾配の関係にヒステリシスが現れることを示す。この分岐はプラズマ構造における多安定状態を引き起こし、輸送係数の遷移あるいはフラックスの自発的振動をもたらす。プラズマ分布の構造形成とダイナミクスを説明する。

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Turbulent transport
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