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Dynamics of enhanced neoclassical particle transport of tracer impurity ions in ion temperature gradient driven turbulence
https://repo.qst.go.jp/records/81797
https://repo.qst.go.jp/records/8179728419407-fa86-4739-84be-75ef58a9d388
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-02-09 | |||||
| タイトル | ||||||
| タイトル | Dynamics of enhanced neoclassical particle transport of tracer impurity ions in ion temperature gradient driven turbulence | |||||
| 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 |
Yasuhiro, Idomura
× Yasuhiro, Idomura× Obrejan, Kevin× Asahi, Yuichi× Mitsuru, Honda× Yasuhiro, Idomura× Mitsuru, Honda |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Tracer impurity transport in ion temperature gradient-driven (ITG) turbulence is investigated using a global full-f gyrokinetic simulation including kinetic electrons, bulk ions, and low to medium Z tracer impurities, where Z is the charge number. It is found that in addition to turbulent particle transport, enhanced neoclassical particle transport due to a new synergy effect between turbulent and neoclassical transports makes a significant contribution to tracer impurity transport. Bursty excitation of the ITG mode generates non-ambipolar turbulent particle fluxes of electrons and bulk ions, leading to a fast growth of the radial electric field following the ambipolar condition. The divergence of ExB flows compresses up-down asymmetric density perturbations, which are subject to transport induced by the magnetic drift. The enhanced neoclassical particle transport depends on the ion mass because the magnitude of up-down asymmetric density perturbation is determined by a competition between the E_B compression effect and the return current given by the parallel streaming motion. This mechanism does not work for the temperature and, thus, selectively enhances only particle transport. | |||||
| 書誌情報 |
Physics of Plasmas 巻 28, 号 1, p. 012501, 発行日 2021-02 |
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| 出版者 | ||||||
| 出版者 | The American Institute of Physics | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1070-664X | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1063/5.0027484 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://aip.scitation.org/doi/10.1063/5.0027484 | |||||
