WEKO3
アイテム
Energy-selective confinement of fusion-born alpha particles during internal relaxations in a tokamak plasma
https://repo.qst.go.jp/records/86524
https://repo.qst.go.jp/records/865243629a1e0-afd2-4cd7-8fe3-f2a167f7bfea
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-07-08 | |||||
| タイトル | ||||||
| タイトル | Energy-selective confinement of fusion-born alpha particles during internal relaxations in a tokamak plasma | |||||
| 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 |
Bierwage, Andreas
× Bierwage, Andreas× Koji, Shinohara× O. Kazakov, Yevgen× G. Kiptily, Vasily× Lauber, Philipp× Nocente, Massimo× Stancar, Ziga× Shuhei, Sumida× Masatoshi, Yagi× Garcia, Jeronimo× Shunsuke, Ide× Contributors, JET× Bierwage, Andreas× Koji, Shinohara× Shuhei, Sumida× Masatoshi, Yagi× Shunsuke, Ide |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Long-pulse operation of a self-sustained fusion reactor using toroidal magnetic containment requires control over the content of alpha particles produced by D-T fusion reactions. On the one hand, MeV-class alpha particles must stay confined to heat the plasma. On the other hand, decelerated helium ash must be expelled before diluting the fusion fuel. Here, we report results of kinetic-magnetohydrodynamic hybrid simulations of a large tokamak plasma that confirm the existence of a parameter window where such energy-selective confinement can be accomplished by exploiting internal relaxation events known as sawtooth crashes. The physical picture — a synergy between magnetic geometry, optimal crash duration and rapid particle motion — is completed by clarifying the role of magnetic drifts. Besides causing asymmetry between co- and counter-going particle populations, magnetic drifts determine the size of the confinement window by dictating where and how much reconnection occurs in particle orbit topology. | |||||
| 書誌情報 |
Nature Communications 巻 13, p. 3941-1-3941-10, 発行日 2022-07 |
|||||
| 出版者 | ||||||
| 出版者 | Springer | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 2041-1723 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1038/s41467-022-31589-6 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1038/s41467-022-31589-6 | |||||
