WEKO3
アイテム
Effect of ECH/ECCD on Energetic-Particle-Driven MHD Modes in Helical Plasmas
https://repo.qst.go.jp/records/79367
https://repo.qst.go.jp/records/79367e30690b3-2de9-4322-914a-4566ee342398
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-03-12 | |||||
| タイトル | ||||||
| タイトル | Effect of ECH/ECCD on Energetic-Particle-Driven MHD Modes in Helical Plasmas | |||||
| 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 |
Yamamoto, Satoshi
× Yamamoto, Satoshi× Nagasaki, Kazunobu× Nagaoka, Kenichi× Varela, Jacobo× Cappa, Alvaro× Ascasibar, Enrique× Castejon, Francisco× Fontdecaba, Josep× Manuel, García× Ida, Katsumi× Ishizawa, Akihiro× Isobe, Mitsutaka× Kobayashi, Shinji× Liniers, Macarena× Daniel, Lopez-Bruna× Marushchenko, Nikolai× Medina, Francisco× Melnikov, Alexander× Minami, Takashi× Mizuuchi, Tohru× Nakamura, Yuji× Ochando, Maria× Ogawa, Kunihiro× Ohshima, Shinsuke× Okada, Hiroyuki× Osakabe, Masaki× Sanders, Mike× Velasco, Jose× Weir, Gavin× Narushima, Mikiro× Gonzalez, Antonio× Yamamoto, Satoshi× Nagasaki, Kazunobu× Ida, Katsumi× Ishizawa, Akihiro |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The effect of electron cyclotron heating (ECH) and current drive (ECCD) on energetic-particle (EP)-driven magnetohydrodynamic (MHD) modes is studied in the helical devices LHD, TJ-II and Heliotron J. We demonstrate that EP-driven MHD modes, including Alfvén eigenmodes (AEs) and energetic particle modes (EPMs), can be controlled by ECH/ECCD. In the LHD device, which has a moderate rotational transform and a high magnetic shear, co-ECCD enhances toroidal AEs (TAEs) and global AEs (GAEs), while counter-ECCD stabilizes them, which improves the neutron rate compared with the co-ECCD case. Counter-ECCD decreases the core rotational transform and increases the magnetic shear, strengthening the continuum damping on the shear Alfvén continua (SAC). In the TJ-II device, which has a high rotational transform, moderate magnetic shear and low toroidal field period, helical AEs (HAEs) appear when the HAE frequency gap of the SAC is changed by counter-ECCD combined with a bootstrap current and NB-driven current. On the other hand, both co- and counter-ECCD are effective in stabilizing GAEs and EPMs in the Heliotron J device, which has a low rotational transform and low magnetic shear. The experimental results indicate that the magnetic shear has a stabilizing effect regardless of its sign. Modelling analysis using the FAR3d code shows that the growth rates are reduced by both co- and counter-ECCD in Heliotron J, reproducing the show that the effect depends on the magnetic configuration. In Heliotron J, some modes are stabilized experimental results. ECH only also affects EP-driven MHD modes, and the experimental results with an increase in ECH power in the low-bumpiness magnetic configuration, while some modes are destabilized in the high- and medium-bumpiness magnetic configurations. |
|||||
| 書誌情報 |
Nuclear Fusion 巻 60, 号 6, 発行日 2020-03 |
|||||
| 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/ab7f13 | |||||
| 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/ab7f13 | |||||
