Suppression and mitigation of inter-ELM high-frequency Alfven-like mode by resonant magnetic perturbation in EAST
文献类型：期刊论文
| 作者 | Zhao, Jiquan1,2; Sun, Youwen1 ; Chu, Nan1,2; Shi, Tonghui1; Ma, Qun1,2; Wang, Yumin1; He, Kaiyang1,2; Hu, Youjun1
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| 刊名 | PLASMA SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 23 |
| ISSN号 | 1009-0630 |
| 关键词 | Alfven-like mode RMP HFAM mode inter-ELM |
| DOI | 10.1088/2058-6272/ac06b8 |
| 通讯作者 | Sun, Youwen(ywsun@ipp.ac.cn) |
| 英文摘要 | Suppression and mitigation of a high-frequency Alfven-like mode (HFAM) between type-I edge localized modes (ELMs) during ELM mitigation by resonant magnetic perturbation (RMP) is observed for the first time in the EAST tokamak. This mode is located near the edge pedestal region. The modeling result of the Alfven continuum shows that the HFAM is located near the elipical Alfven eigenmode (EAE) gap. During the application of n = 1 RMP for ELM mitigation, the HFAM can be fully suppressed when the RMP amplitude exceeds a threshold, below which the HFAM is mitigated. The suppression is caused by a reduction of pedestal height induced by RMP. In the case using n = 3 RMP, the mode is localized toroidally at specific phase depending on the phase of applied RMP, i.e. locked in the three-dimensional equilibrium formed by RMP. The dominant toroidal mode number of HFAM is around n = -6 and it reduces to -3 during the application of n = 3 RMP, which indicates the existence of possible nonlinear coupling between the HFAM and RMP. Here the negative mode number denotes that the mode rotates in electron diamagnetic drift direction. The observation reported here improves the understanding of pedestal dynamics and its stability in RMP ELM control. |
| 资助项目 | National Key R&D Program of China[2017YFE0301100] ; National Natural Science Foundation of China[11 875 292] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000676023000001 |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/123257]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Sun, Youwen |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, HFIPS, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Jiquan,Sun, Youwen,Chu, Nan,et al. Suppression and mitigation of inter-ELM high-frequency Alfven-like mode by resonant magnetic perturbation in EAST[J]. PLASMA SCIENCE & TECHNOLOGY,2021,23. |
| APA | Zhao, Jiquan.,Sun, Youwen.,Chu, Nan.,Shi, Tonghui.,Ma, Qun.,...&Hu, Youjun.(2021).Suppression and mitigation of inter-ELM high-frequency Alfven-like mode by resonant magnetic perturbation in EAST.PLASMA SCIENCE & TECHNOLOGY,23. |
| MLA | Zhao, Jiquan,et al."Suppression and mitigation of inter-ELM high-frequency Alfven-like mode by resonant magnetic perturbation in EAST".PLASMA SCIENCE & TECHNOLOGY 23(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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