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On the clumps in turbulent magnetized plasma

C F Zhang1987年Plasma Physics and Controlled FusionIF 2.2出版社

Starting from the Vlasov equation (instead of the drift kinetic equation), the clumps equation is derived under QL-2 approximation. Then its moment equations are obtained. For small separation of two points in phase space, the moment equations are closed and can be solved exactly. The authors show that for ion clumps, Larmor radius effect plays an important role. Ion clumps occupy a much smaller volume in phase space than that obtained from drift approximation. For electron clumps, longitudinal diffusion may be important as well as the cross field diffusion. The time evolution of clumps with different alpha ( alpha =( tau perpendicular to / tau /sub ///)3. tau perpendicular to = Omega 2L2perpendicular to /2Dperpendicular to , tau /sub ///=(L/sub ///2/2D/sub ///)13/) are discussed.

日本語訳

Vlasov方程式(ドリフト運動論方程式ではなく)から出発して、QL-2近似の下でクランプ方程式を導出する。次にそのモーメント方程式を得る。位相空間における2点の小さな分離に対して、モーメント方程式は閉じており、厳密に解くことができる。著者らは、イオンクランプについては、ラーモア半径効果が重要な役割を果たすことを示す。イオンクランプは、ドリフト近似から得られるものよりもはるかに小さな位相空間体積を占める。電子クランプについては、横拡散と同様に縦拡散も重要であり得る。異なるα(α = (τ_⊥ / τ_∥)^3、τ_⊥ = Ω^2 L_⊥^2 / (2 D_⊥)、τ_∥ = (L_∥^2 / (2 D_∥))^{13})を持つクランプの時間発展について議論する。

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Magnetized plasma
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