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Self-consistent runaway beam formation in 3D magnetic fields during radiation-driven disruptions
https://repo.qst.go.jp/records/54927
https://repo.qst.go.jp/records/54927bd15b558-c5c9-4448-9f8b-4531fd66c676
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-10-30 | |||||
| タイトル | ||||||
| タイトル | Self-consistent runaway beam formation in 3D magnetic fields during radiation-driven disruptions | |||||
| 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 |
Matsuyama, Akinobu
× Matsuyama, Akinobu× Aiba, Nobuyuki× Isayama, Akihiko× Yagi, Masatoshi× 松山 顕之× 相羽 信行× 諫山 明彦× 矢木 雅敏 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Fluid modeling of runaway electron generation [A. Matsuyama, et al., Nucl. Fusion 57, 066038 (2017)] is extended as an integrated simulator of whole disruption phase from thermal quench due to disruptive instabilities to full current conversion by the runaway beam. Such an integrated simulation is useful to provide a consistent picture of the runaway beam formation in mitigated disruptions of ITER-grade devices. While seed runaway currents are lost by the magnetic surface break-up, they can be confined after the recovery of nested surfaces. Because of its burst-like nature, hot-tail electrons survive if the central TQ occurs after the recovery of the edge boundary. It is suggested that the steady runaway seed generation due to tritium decay and Compton scattering poses an irreducible minimum for runaway seeds in the D-T activation phase. On the longer timescale, the avalanche growth rate is shown to be affected by drop of internal inductance due to internal reconnection. For the efficacy of runaway avoidance with massive deuterium deposition, the reduced ohmic heating and the associated changes of atomic processes to a recombining state are suggested as a key characteristic. | |||||
| 書誌情報 |
Proceedings of the 27th IAEA Fusion Energy Conference (FEC2018) 発行日 2018-10 |
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| 出版者 | ||||||
| 出版者 | International Atomic Energy Agency, Vienna | |||||
