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NONLINEAR DYNAMICS OF TEARING MODE DRIVEN BY STATIC AND ROTATING EXTERNAL 3D FIELDS
https://repo.qst.go.jp/records/54976
https://repo.qst.go.jp/records/54976084b70d1-e6d6-4085-93d0-44585ca5d9ac
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-02-05 | |||||
| タイトル | ||||||
| タイトル | NONLINEAR DYNAMICS OF TEARING MODE DRIVEN BY STATIC AND ROTATING EXTERNAL 3D FIELDS | |||||
| 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_5794 | |||||
| 資源タイプ | conference paper | |||||
| 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 |
井上, 静雄
× 井上, 静雄× Okabayashi, Michio× Taylor, Zane× J., Strait Edward× 白石, 淳也× 武智, 学× 松永, 剛× 諫山, 明彦× 林, 伸彦× 井手, 俊介× 井上 静雄× 白石 淳也× 武智 学× 松永 剛× 諫山 明彦× 林 伸彦× 井手 俊介 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The interaction of a locked tearing mode with a non-axisymmetric control field is numerically explored via nonlinear resistive MHD simulation code “AEOLUS-IT”. Locked tearing mode islands often lead to disruptions in tokamaks. Experiments have shown that unlocking and rotating the island using a rotating control field (CF) can postpone or prevent a disruption. The dynamics of this control has been modelled with the AEOLUS-IT code in both tearing stable and unstable plasmas. The fundamental responses of penetration and screening of the CF and static error field have been identified and characterized in both tearing stable and unstable model plasmas. Forced-rotation of the CF prevents the EF penetration in both plasmas, which is characterized with a finite slip frequency between plasmas and the CF. On the other hand, the magnetic island rotating frame is different between tearing stable and unstable plasmas. The magnetic island rotates with the external fields in tearing stable plasmas, while it coalesces with the plasmas. Furthermore, model predictions of two distinct regimes of plasma responses, characterized as standing-wave and traveling-wave responses, are in qualitative agreement with DIII-D observations. These results are an important step toward predictive understanding of this approach to tearing mode control and disruption avoidance. | |||||
| 書誌情報 |
Proceedings of 27th IAEA Fusion Energy Conference 発行日 2019-02 |
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