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It is demonstrated that a non-Taylor finite beta self-organized state is realized in which a perpendicular component of the electric current is generated and the force-free(parallel) current decreases until until they reach to almost the same level. The self-organized state is described by an MHD force-balance relation, namely, j perp = B x nabla p/B.B and J_ parallel = muB where mu is not a constant, and the pressure structure resembles the structure of the toroidal magnetic field intensity. Unless an anomalous perpendicular thermal conduction arises, the plasma cannot relax to a Taylor state but to a non-Taylor(non-force-free) self-organized state. This state becomes more prominent for a weaker resistivity condition. The non-Taylor state has a rather universal property, for example, independence of the initial beta value. Another remarkable finding is that the Taylor\u0027s conjecture of helicity conservation is, in a strict sense, not valid. The helicity dissipation occurs and its rate slows down critically in accordance with the stepwise relaxation of the magnetic energy. It is confirmed that the driven magnetic reconnection caused by the nonlinearly excited plasma kink flows plays the leading role in all of theses key features of the non-Taylor self-organization.\"", "subitem_description_type": "Abstract"}]}, "item_5_source_id_10": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0915-633X", "subitem_source_identifier_type": "ISSN"}]}, "item_5_text_25": {"attribute_name": "登録情報", "attribute_value_mlt": [{"subitem_text_value": "Made available in DSpace on 2010-02-05T10:16:08Z (GMT). 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Non-Taylor Magnetohydrodynamic Self-Organization
http://hdl.handle.net/10655/2350
http://hdl.handle.net/10655/23507e46aba9-f8cf-4426-9881-dc72882d5c55
Item type | 研究報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Non-Taylor Magnetohydrodynamic Self-Organization | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | magnetohydrodynamic simulation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | finite pressure | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | magnetic helicity | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | driven magnetic reconnection | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | stepwise relaxation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | non-Taylor self-organization | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
"Zhu, Shao-ping
× "Zhu, Shao-ping× Horiuchi, R.× Sato, T.× The, Complexity Simulation Group" |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "A self-organization process in a plasma with a finite pressure is investigated by means of a three-dimensional magnetohydrodynamic simulation. It is demonstrated that a non-Taylor finite beta self-organized state is realized in which a perpendicular component of the electric current is generated and the force-free(parallel) current decreases until until they reach to almost the same level. The self-organized state is described by an MHD force-balance relation, namely, j perp = B x nabla p/B.B and J_ parallel = muB where mu is not a constant, and the pressure structure resembles the structure of the toroidal magnetic field intensity. Unless an anomalous perpendicular thermal conduction arises, the plasma cannot relax to a Taylor state but to a non-Taylor(non-force-free) self-organized state. This state becomes more prominent for a weaker resistivity condition. The non-Taylor state has a rather universal property, for example, independence of the initial beta value. Another remarkable finding is that the Taylor's conjecture of helicity conservation is, in a strict sense, not valid. The helicity dissipation occurs and its rate slows down critically in accordance with the stepwise relaxation of the magnetic energy. It is confirmed that the driven magnetic reconnection caused by the nonlinearly excited plasma kink flows plays the leading role in all of theses key features of the non-Taylor self-organization." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 1994-10-01 |
|||||
報告書番号 | ||||||
NIFS-314 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |