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Suppression and mitigation of inter-ELM high-frequency Alfvén-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
刊名Plasma Science and Technology
出版日期2021-07-23
卷号23
ISSN号1009-0630
关键词Alfvén-like mode RMP HFAM mode inter-ELM
DOI10.1088/2058-6272/ac06b8
通讯作者ZHAO,Jiquan()
英文摘要Abstract Suppression and mitigation of a high-frequency Alfvén-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 Alfvén continuum shows that the HFAM is located near the elipical Alfvén 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.
语种英语
出版者IOP Publishing
WOS记录号IOP:1009-0630-23-9-AC06B8
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/123976]  
专题中国科学院合肥物质科学研究院
通讯作者ZHAO,Jiquan
作者单位1.Institute of Plasma Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
2.University of Science and Technology of China, Hefei 230026, People's Republic of 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 Alfvén-like mode by resonant magnetic perturbation in EAST[J]. Plasma Science and 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 Alfvén-like mode by resonant magnetic perturbation in EAST.Plasma Science and Technology,23.
MLA ZHAO,Jiquan,et al."Suppression and mitigation of inter-ELM high-frequency Alfvén-like mode by resonant magnetic perturbation in EAST".Plasma Science and 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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