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Bifurcation physics of magnetic islands and stochasticity explored by heat pulse propagation studies in toroidal plasmas
http://hdl.handle.net/10655/00012545
http://hdl.handle.net/10655/000125456bb4b1f1-cd70-4667-8210-6709f60afd67
名前 / ファイル | ライセンス | アクション |
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Nucl.Fusion56(9)_pp092001 (4.2 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-07-05 | |||||
タイトル | ||||||
タイトル | Bifurcation physics of magnetic islands and stochasticity explored by heat pulse propagation studies in toroidal plasmas | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | stochasticity | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | magnetic island | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | bifucation | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | heat puls propagation | |||||
キーワード | ||||||
主題Scheme | Other | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
IDA, Katsumi
× IDA, Katsumi× Kobayashi, Tatsuya× INAGAKI, Shigeru× ITOH, Kimitaka |
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著者ID | ||||||
内容記述タイプ | Other | |||||
内容記述 | 0000-0002-0585-4561 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Bifurcation physics of a magnetic island was investigated using the heat pulse propagation technique produced by the modulation of electron cyclotron heating. There are two types of bifurcation phenomena observed in a large helical device (LHD) and DIII-D. One is a bifurcation of the magnetic topology between nested and stochastic fields. The nested state is characterized by the bi-directional (inward and outward) propagation of the heat pulse with slow propagation speed. The stochastic state is characterized by the fast propagation of the heat pulse with electron temperature flattening. The other bifurcation is between the magnetic island with larger thermal diffusivity and that with smaller thermal diffusivity. The damping of toroidal flow is observed at the O-point of the magnetic island both in helical plasmas and in tokamak plasmas during a mode locking phase with strong flow shears at the boundary of the magnetic island. Associated with the stochastization of the magnetic field, the abrupt damping of toroidal flow is observed in LHD. The toroidal flow shear shows a linear decay, while the ion temperature gradient shows an exponential decay. This observation suggests that this flow damping is due to the change in the non-diffusive term of momentum transport. | |||||
書誌情報 |
Nuclear Fusion 巻 56, 号 9, p. 092001, 発行日 2016-07-29 |
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出版者 | ||||||
出版者 | IOP Publishing | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 17414326 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12472385 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1088/0029-5515/56/9/092001 | |||||
権利 | ||||||
権利情報 | This is the Accepted Manuscript version of an article accepted for publication in Nuclear Fusion IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/0029-5515/56/9/092001. | |||||
情報源 | ||||||
関連名称 | Citation K. Ida et al 2016 Nucl. Fusion 56 092001 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1088/0029-5515/56/9/092001 | |||||
関連名称 | Publisher version | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
NAIS | ||||||
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