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Torque to counter-current direction driving low frequency tearing modes in JT-60U
https://repo.qst.go.jp/records/84811
https://repo.qst.go.jp/records/848119217f338-c297-4a4f-ac0a-989df78987e7
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-11-13 | |||||
| タイトル | ||||||
| タイトル | Torque to counter-current direction driving low frequency tearing modes in JT-60U | |||||
| 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 |
Takahiro, Bando
× Takahiro, Bando× Mitsuru, Honda× Shizuo, Inoue× Maiko, Yoshida× Go, Matsunaga× Akihiko, Isayama× Manabu, Takechi× Koji, Shinohara× Shuhei, Sumida× Takahiro, Bando× Mitsuru, Honda× Shizuo, Inoue× Maiko, Yoshida× Go, Matsunaga× Akihiko, Isayama× Manabu, Takechi× Koji, Shinohara× Shuhei, Sumida |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In the JT-60U tokamak, low frequency modes (LFMs) have been reported recently when the m/n = 2/1 neoclassical tearing mode grows sufficiently. LFMs show the low mode frequencies (<20 Hz) with the rotation direction to the counter-current direction (ctr-direction) toroidally, even if strong injection power to the co-current direction (co-direction) is applied by tangential neutral beam injections. As a candidate to drive the rotation to the ctr-direction, the neoclassical toroidal viscosity (NTV) torque is investigated in this study. Indeed, when a LFM is observed, the estimated 'offset velocity' of the NTV torque is larger than the observed toroidal velocity around the q = 2 surface and results in the torque to the ctr-direction (ctr-torque). The torque balance between the NTV torque and the torque induced by the eddy current on the resistive wall is investigated. It is found that the rotation to the ctr-direction having the low mode frequency is obtained as the result of the ctr-torque to the offset velocity. Our investigation suggests the requirement to include the NTV torque in the modeling on the mode locking of neoclassical tearing modes in tokamaks. | |||||
| 書誌情報 |
Plasma Physics and Controlled Fusion 巻 63, 号 11, p. 115005, 発行日 2021-11 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0741-3335 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1361-6587/ac11b7 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://iopscience.iop.org/article/10.1088/1361-6587/ac11b7/meta | |||||
