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Self-consistent development of fast magnetic reconnection with anomalous plasma resistivity

M Ugai1984年Plasma Physics and Controlled FusionIF 2.2出版社

The generic feature of the fast reconnection process that develops self-consistently with the growth of anomalous resistivity is numerically studied. The anomalous resistivity due to current-driven instability is quite favorable to the occurrence of the fast reconnection mechanism, and vice-versa, which leads to rapid magnetic energy conversion. As the growth of the anomalous resistivity becomes saturated, a magnetic island is suddenly formed and is attached to slow shocks standing in the extended region. In this respect, the author argues that Petschek's configuration (1964) involving a large-scale X-type magnetic field is unstable against resistive tearing mode in high-temperature plasmas where the anomalous resistivity is most effective in providing an electrical resistivity.

日本語訳

異常抵抗率の成長とともに自己整合的に発展する高速磁気リコネクション過程の一般的特徴を数値的に研究した。電流駆動不安定性による異常抵抗率は、高速リコネクション機構の発生に極めて有利に働き、その逆もまた然りであり、これにより急速な磁気エネルギー変換が引き起こされる。異常抵抗率の成長が飽和に達すると、磁気島が突然形成され、拡張領域に存在する低速衝撃波に付随する。この観点から、著者は、高温プラズマにおいて異常抵抗率が電気抵抗を提供する上で最も効果的である場合、大規模なX型磁場構造を伴うPetschekの配置(1964年)は、抵抗性テアリング不安定性に対して不安定であると論じる。

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Fusion Advanced Studies TorusMagnetic reconnection
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