Observation of enhanced pedestal turbulence during ELM mitigation with resonant magnetic perturbation on EAST

doi:10.1063/5.0056082

	Observation of enhanced pedestal turbulence during ELM mitigation with resonant magnetic perturbation on EAST
	Zhong, Fubin 1,2; Zhang, Tao 1; Wang, Yumin 1; Wen, Fei 1; Huang, Jia 1,2; Wu, Mingfu 1,2; Li, Gongshun 1; Liu, Yukai 3; Geng, Kangning 3; Xiang, Haoming 1,2
刊名	AIP ADVANCES
	2021-07-01
卷号	11
DOI	10.1063/5.0056082
通讯作者	Zhang, Tao(zhangt@ipp.ac.cn)
英文摘要	Edge localized mode (ELM) mitigation accompanied by density pump-out has been achieved during the application of resonant magnetic perturbation (RMP) with a toroidal mode number of n = 4 on EAST recently. The mean ELM frequency increases by a factor of 2.7 from 86 to 235 Hz with a decreased reduction in ELM loss. The evolution of pedestal electron density measured by a profile reflectometer before and after turning on the RMP current is presented. Both the pedestal density and density gradient show a decrease with application of RMP. The density fluctuation in the pedestal region has been measured by an O-mode fluctuation reflectometer. The broadband density fluctuation with a frequency range of 20-115 kHz is enhanced at the later period of the inter-ELM phase during ELM mitigation. This phenomenon is also observed for magnetic fluctuation measured by magnetic probes mounted in the vacuum vessel. A further study shows that the enhanced broadband fluctuations lead to a decrease in the growth rate of the pedestal density and an increase in divert or particle flux. This result implies that these enhanced broadband fluctuations could lead to an enhancement of outward particle transport. The possible roles of the enhanced fluctuations observed in ELM mitigation are also discussed. (c) 2021 Author(s).
资助项目	National Key R&D Program of China[2017YFE0301205] ; National Key R&D Program of China[2019YFE03040002] ; National Key R&D Program of China[2019YFE03080200] ; National Natural Science Foundation of China[11875289] ; National Natural Science Foundation of China[11675211] ; National Natural Science Foundation of China[11805136] ; National Natural Science Foundation of China[12075284] ; Youth Science and Technology Talents Support Program (2020) by Anhui Association for Science and Technology[RCTJ202009]
WOS关键词	EDGE LOCALIZED MODES ; DENSITY PROFILE ; REFLECTOMETRY
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	AIP Publishing
WOS记录号	WOS:000692286100004
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; Youth Science and Technology Talents Support Program (2020) by Anhui Association for Science and Technology
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125251]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Tao
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China 4.Nanchang Univ, Inst Fus Energy & Plasma Applicat, Dept Phys, Jiangxi Prov Key Lab Fus & Informat Control, Nanchang 330031, Jiangxi, Peoples R China 5.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
推荐引用方式 GB/T 7714	Zhong, Fubin,Zhang, Tao,Wang, Yumin,et al. Observation of enhanced pedestal turbulence during ELM mitigation with resonant magnetic perturbation on EAST[J]. AIP ADVANCES,2021,11.
APA	Zhong, Fubin.,Zhang, Tao.,Wang, Yumin.,Wen, Fei.,Huang, Jia.,...&Gao, Xiang.(2021).Observation of enhanced pedestal turbulence during ELM mitigation with resonant magnetic perturbation on EAST.AIP ADVANCES,11.
MLA	Zhong, Fubin,et al."Observation of enhanced pedestal turbulence during ELM mitigation with resonant magnetic perturbation on EAST".AIP ADVANCES 11(2021).