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Influence of asymmetries and guide fields on the magnetic reconnection diffusion region in collisionless space plasmas

J P Eastwood, T D Phan, M Øieroset, M A Shay, K Malakit, M Swisdak, J F Drake, A Masters2013年Plasma Physics and Controlled FusionIF 2.2出版社

Collisionless magnetic reconnection is considered to be one of the most important plasma phenomena because it governs the transport of energy, momentum and plasma in a wide variety of situations. In particular, understanding the central diffusion region is crucial to gaining a full understanding of the physics of reconnection. Although most diffusion region studies have historically focussed on simple reconnection geometries (antiparallel fields and symmetric reconnecting plasmas), in recent years significant progress has been made in understanding the impact of plasma asymmetries, guide fields and flow shear on collisionless diffusion region physics. Here we present a review of this recent progress, which is based both on supercomputer simulations and increasingly detailed multi-point satellite measurements of collisionless magnetic reconnection in space plasmas.

日本語訳

無衝突磁気リコネクションは、多様な状況におけるエネルギー、運動量、およびプラズマの輸送を支配するため、最も重要なプラズマ現象の一つと考えられている。特に、中心拡散領域の理解は、リコネクションの物理を完全に理解する上で極めて重要である。歴史的に、拡散領域の研究のほとんどは単純なリコネクション形状(反平行磁場および対称的なリコネクションプラズマ)に焦点を当ててきたが、近年では、プラズマの非対称性、ガイド磁場、および流れのシアが無衝突拡散領域の物理に与える影響の理解において大きな進展が見られている。本稿では、この最近の進展について、超並列計算機シミュレーションと、宇宙プラズマにおける無衝突磁気リコネクションのますます詳細化された多点衛星観測の両方に基づくレビューを提示する。

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