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Impact of fast ions on a trapped-electron-mode dominated plasma in a JT-60U hybrid scenario
https://repo.qst.go.jp/records/79949
https://repo.qst.go.jp/records/799494d18b384-a6bc-4665-9c04-b5785e9c61e5
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-05-11 | |||||
| タイトル | ||||||
| タイトル | Impact of fast ions on a trapped-electron-mode dominated plasma in a JT-60U hybrid scenario | |||||
| 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 |
Mazzi, S.
× Mazzi, S.× Zarzoso, D.× Garcia, J.× T., Görler× Di Siena, A.× Camenen, Y.× Benkadda, S.× Yoshida, Maiko× Hayashi, Nobuhiko× Shinohara, Koji× Maiko, Yoshida× Nobuhiko, Hayashi× Koji, Shinohara |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The impact of fast ions on a trapped electron mode (TEM) is extensively analysed by linear and nonlinear gyrokinetic simulations for a JT-60U plasma at high and low magnetic shear using the Gene code in local approximation. For the first time, it is shown that TEM-induced turbulent transport may remain unaffected by the steep fast ion pressure profile generated by the neutral beam injection. Unlike recent observations of ion temperature gradient (ITG)- induced turbulent transport reductions due to fast ions, TEM-dominated systems could act differently in the presence of a significant fast ion population. The possible role of zonal flows as a saturation mechanism is analyzed, showing that their weak impact in the reported JT-60U scenario might lead to different behaviour of fast ions with respect to the ITG-dominated discharges. It is also shown that Alfvénic shear modes are destabilized at low wave numbers (n≈8). They are identified as drift Alfvén waves destabilized by ITG, which is a form of Alfvénic ITG instabilities. Deep numerical analysis provides the physical parameter range in which ITG-driven BAEs are stabilized. These results open the way to new possibilities of tailoring |
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| 書誌情報 |
Nuclear Fusion 巻 60, p. 046026, 発行日 2020-03 |
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| 出版者 | ||||||
| 出版者 | Institute of Physics | |||||
| 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/ab74a1 | |||||
| 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/ab74a1 | |||||
