The origins of electrical resistivity in magnetic reconnection: Studies by 2D and 3D macro particle simulations
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- Tanaka Motohiko
- Research and Information Center, National Institute for Fusion Science
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- タイトル別名
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- origins of electrical resistivity in magnetic reconnection Studies by 2D and 3D macro particle simulations
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説明
This article argues the roles of electrical resistivity in magnetic reconnection, and also presents recent 3D particle simulations of coalescing magnetized flux bundles. Anomalous resistivity of the lower-hybrid-drift (LHD) instability, and collisionless effects of electron inertia and/or off-diagonal terms of electron pressure tensor are thought to break the frozen-in state that prohibits magnetic reconnection. Studies show that, while well-known stabilization of the LHD instability in high-beta plasma condition makes anomalous resistivity less likely, the electron inertia and/or the off-diagonal electron pressure tensor terms make adequate contributions to break the frozen-in state, depending on strength of the toroidal magnetic field. Large time and space scale particle simulations show that reconnection in magnetized plasmas proceeds by means of electron inertia effect, and that electron acceleration results instead of Joule heating of the MHD picture. Ion inertia contributes positively to reconnection, but ion finite Larmor radius effect does negatively because of charge separation of ions and magnetized electrons. The collisionless processes of the 2D and 3D simulations are similar in essence, and support the mediative role of electron inertia in magnetic reconnection of magnetized plasmas.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 53 (6), 463-472, 2001
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390001206512740608
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- NII論文ID
- 10007639439
- 130003956247
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 5859153
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDLサーチ
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