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Magnetohydrodynamic tearing modes (TMs) lock to them, causing sudden losses\nof confinement known as disruptions. Recently, a hypothesis has been proposed that there\nmay exist a self-healing stable regime in which a static resonant EF is effectively shielded\nby forcing these TMs to slowly rotate inductively by the applied non-axisymmetric field (Inoue et al 2017 Nucl. Fusion 57 116020; Inoue et al 2018 Plasma. Phys. Control. Fusion\n60 025003; Inoue et al 2018 Preprint: 2018 IAEA Fusion Energy Conf. TH/P4-24). This is based on non-linear, resistive, reduced magnetohydrodynamic simulations using a cylindrical single helicity model. Proof-of-principle experiments in the DIII-D device showed that the magnetic mode structure on the plasma surface is qualitatively consistent with the simulation prediction. However, radial mode profiles revealed qualitatively different behavior. This led\nto a revised hypothesis that in actual non-circular toroidal devices, a tearing layer in forced rotation induces a shielding process at other rational surfaces when we take into account multiple resonant Fourier components. 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A new stabilizing regime of tearing mode entrainment in the presence of a static error field
https://repo.qst.go.jp/records/77019
https://repo.qst.go.jp/records/77019e6e07582-6ea9-46ee-8bf2-df38571e4faf
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-10-01 | |||||
タイトル | ||||||
タイトル | A new stabilizing regime of tearing mode entrainment in the presence of a static error field | |||||
言語 | ||||||
言語 | eng | |||||
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 | |||||
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 |
Okabayashi, M
× Okabayashi, M× Inoue, Shizuo× Logan, NC× Strait, EJ× Grassie, J× Ferrano, N× Hanson, J× Jardin, S× La Haye, RJ× Liu, YQ× C, Paz-Soldan× Sugiyama, LE× Wingen, A× N.Z.Taylor× Shizuo, Inoue |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Uncorrected static error fields (EFs) in axisymmetric fusion devices are one of the few remaining serious obstacles for advancing the present tokamak-based approach to a practical reactor. Magnetohydrodynamic tearing modes (TMs) lock to them, causing sudden losses of confinement known as disruptions. Recently, a hypothesis has been proposed that there may exist a self-healing stable regime in which a static resonant EF is effectively shielded by forcing these TMs to slowly rotate inductively by the applied non-axisymmetric field (Inoue et al 2017 Nucl. Fusion 57 116020; Inoue et al 2018 Plasma. Phys. Control. Fusion 60 025003; Inoue et al 2018 Preprint: 2018 IAEA Fusion Energy Conf. TH/P4-24). This is based on non-linear, resistive, reduced magnetohydrodynamic simulations using a cylindrical single helicity model. Proof-of-principle experiments in the DIII-D device showed that the magnetic mode structure on the plasma surface is qualitatively consistent with the simulation prediction. However, radial mode profiles revealed qualitatively different behavior. This led to a revised hypothesis that in actual non-circular toroidal devices, a tearing layer in forced rotation induces a shielding process at other rational surfaces when we take into account multiple resonant Fourier components. The time evolution experiment of the radial penetration is supportive of this hypothesis. |
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書誌情報 |
Nuclear Fusion 巻 59, 号 12, p. 126015, 発行日 2019-09 |
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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 | 0029-5515 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1088/1741-4326/ab37d2 | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://iopscience.iop.org/article/10.1088/1741-4326/ab37d2 |