小特集 「プラズマの非局所輸送現象と様々な構造形成」
プラズマの非局所輸送現象と様々な構造形成 5.磁場閉じ込めプラズマにおける揺らぎの非局所性と輸送 5.2 揺らぎの非局所性にかかわる理論的背景
2002 年 78 巻 9 号 p. 903-910
詳細
2002 年 78 巻 9 号 p. 903-910
Nonlocal properties of fluctuations in confined plasmas are briefly surveyed. Contributions to understanding the bifurcation phenomena, improved confinement, and transient transport problem are explained. The theoretical progress in this aspect is addressed: Namely, the fluctuations are not excited by linear instabilities but are dressed with other turbulent fluctuations or fluctuations of meso-scale. Nonlinear interactions of fluctuations with different scale lengths are essential indictating the dynamics of turbulence and turbulent transport. There are activators and suppressers in global inhomogeneities for evolution of turbulence. Turbulent fluctuations, on the other hand, induce or destroy these global inhomogeneities. Finally, statistical nature of turbulence is addressed.
