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On the theory of Alfven vortices

A B Mikhailovskii, V P Lakhin, G D Aburdzhaniya, L A Mikhailovskaya, O G Onishchenko, A I Smolyakov1987年Plasma Physics and Controlled FusionIF 2.2出版社

The revision of the previous theory of shear Alfven vortices in a homogeneous plasma is given. In the previous papers the solutions were not matched adequately on the singular line of the vortex so that they do not satisfy the charge conservation law. The influence of the magnetic viscosity on the character of the admitted discontinuities in the shear Alfven vortices is studied. The nonlinear equations of the shear Alfven waves in the usual approximation of cold ions and also with allowance for the ion temperature are obtained. The solution, in the form of the dipole vortex with spatially decreasing amplitude, is found. The specific character of the solution obtained consists of a power decrease of the transverse potential on sufficiently far vortex periphery. It is shown that the integral characteristics of the vortices (energy, generalized enstrophy) are finite. The numerical analysis of the solution obtained is performed.

日本語訳

均一プラズマにおけるシアー・アルフヴェン渦の従来理論の修正を行う。従来の論文では、渦の特異線上で解が適切に接続されておらず、その結果、電荷保存則を満たさない。磁気粘性がシアー・アルフヴェン渦において許容される不連続性の性質に及ぼす影響を研究する。冷プラズマ近似におけるシアー・アルフヴェン波の非線形方程式、およびイオン温度を考慮した場合の非線形方程式を導出する。空間的に減衰する振幅を持つ双極子渦の形の解が見出される。得られた解の特異な性質は、渦の十分遠方の周辺部における横方向ポテンシャルの冪乗則的な減衰からなる。渦の積分特性(エネルギー、一般化エンストロフィー)が有限であることを示す。得られた解の数値解析を実行する。

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Alfvén wave
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