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Simulation study of interaction between runaway electron generation and resistive MHD modes over avalanche timescale
https://repo.qst.go.jp/records/54719
https://repo.qst.go.jp/records/54719f0eed704-44f4-4ed1-8e1d-49d75e3606d9
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-03-16 | |||||
| タイトル | ||||||
| タイトル | Simulation study of interaction between runaway electron generation and resistive MHD modes over avalanche timescale | |||||
| 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 |
松山, 顕之
× 松山, 顕之× 相羽, 信行× 矢木, 雅敏× 松山 顕之× 相羽 信行× 矢木 雅敏 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Runaway electron generation is simulated using a reduced magnetohydrodynamic (MHD) model that couples runaway generation process and resistive kink modes. It is shown that the concentration of runaway current near the magnetic axis is limited by the presence of sawtooth-like activity, which radially redistributes seed electrons simultaneously with a modification of the ohmic current profile to maintain the central safety factor above unity. The profile of runaway generation rate is also modified, where the peak location of Dreicer generation rate is shifted radially outwards and the resistive kink hinders a feedback mechanism that causes the current concentration in the plasma center. The flat profile of seed electrons is inherited by the avalanche growth. Flat current and q profiles over the beam radius are observed at the runaway current plateau on the avalanche timescale. | |||||
| 書誌情報 |
Proceedings of 26th IAEA Fusion Energy Conference p. TH/P1-34, 発行日 2017-02 |
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