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Magnetic reconnection and current sheet formation in 3D magnetic configurations

Anna G Frank1999年Plasma Physics and Controlled FusionIF 2.2出版社

The problem of magnetic reconnection in three-dimensional (3D) magnetic configurations has been studied experimentally. The research has concentrated on the possibilities of formation of current sheets, which represent crucial objects for a realization of magnetic reconnection phenomena. Different types of 3D magnetic configurations were examined, including configurations with singular lines of the X-type, non-uniform fields containing isolated magnetic null-points and without null-points. It was revealed that formation of quasi-one-dimensional current sheets is the universal process for plasma dynamics in 3D magnetic fields both with null-points and without. At the same time the peculiarities of current sheets, plasma dynamics and magnetic reconnection processes depend essentially on characteristics of 3D magnetic configurations. The result of principal significance obtained was that magnetic reconnection phenomena can take place in a wide range of 3D magnetic configurations as a consequence of their ability to form current sheets.

日本語訳

磁気リコネクションの問題が、三次元(3D)磁気配位において実験的に研究された。この研究は、磁気リコネクション現象の実現にとって決定的な対象である電流シートの形成可能性に焦点を当てた。X型特異線を持つ配位、孤立したヌル点を含む非一様磁場、およびヌル点を含まない配位など、異なるタイプの三次元磁気配位が検討された。三次元磁場における準一次元電流シートの形成は、ヌル点の有無にかかわらず、プラズマダイナミクスの普遍的なプロセスであることが明らかにされた。同時に、電流シートの特性、磁気リコネクションのダイナミクス、およびその効率は、三次元磁気配位の特性に本質的に依存することが示された。得られた主要な結果は、磁気リコネクション現象が、電流シートを形成する能力により、広範囲の三次元磁気配位において発生し得るということである。

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