Experimental study of core and edge fluctuations by reflectometry on EAST tokamak

doi:10.1088/2058-6272/abf4b5

	Experimental study of core and edge fluctuations by reflectometry on EAST tokamak
	Zhou, Zhen 1,4; Zhang, Tao 1; Wu, Mingfu 1,5; Ye, Kaixuan 1,5; Zhong, Fubin 1,5; Huang, Jia 1,5; Geng, Kangning 2,3; Liu, Yukai 2,3; Li, Gongshun 1; Xiang, Haoming 1,5
刊名	PLASMA SCIENCE & TECHNOLOGY
	2021-07-01
卷号	23
关键词	core fluctuation edge fluctuation reflectometry
ISSN号	1009-0630
DOI	10.1088/2058-6272/abf4b5
通讯作者	Zhang, Tao(zhangt@ipp.ac.cn)
英文摘要	An eight-channel poloidal correlation reflectometer (PCR) with O-mode polarization has been installed in the EAST tokamak to measure the fluctuations from core to edge. The PCR launches eight different frequency microwaves (20.4, 24.8, 33, 40, 42.4, 48, 52.6, 57.2 GHz) into the plasma from the low field side and two poloidally separated antennae are used to receive the reflected waves. As a result, the diagnostic can measure fluctuations in eight (radial)x two (poloidal) spatial positions. The diagnostic has been applied to study the core and edge pedestal fluctuations during an inter-ELM phase in H-mode plasma. This inter-ELM phase can be divided into two stages. In the first stage, a low frequency (<50 kHz) broadband fluctuation dominates in the pedestal gradient region. In the second stage, this fluctuation is strongly suppressed and quasi-coherent fluctuations (QCFs) appear. The QCF's amplitude increases with the pedestal density gradient, implying density gradient driven instabilities. But the core fluctuations inside the pedestal show no evident changes during the inter-ELM phase.
资助项目	National Key R&D Program of China[2017YFE0301205] ; 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]
WOS关键词	MICROWAVE REFLECTOMETRY
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000649637700001
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/122194]
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 230031, Peoples R China 2.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China 3.Shenzhen Univ, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Coll Optoelect Engn, Shenzhen 5180602, Peoples R China 4.Nanchang Univ, Jiangxi Prov Key Lab Fusion & Informat Control, Inst Fus Energy & Plasma Applicat, Dept Phys, Nanchang 330031, Jiangxi, Peoples R China 5.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Zhen,Zhang, Tao,Wu, Mingfu,et al. Experimental study of core and edge fluctuations by reflectometry on EAST tokamak[J]. PLASMA SCIENCE & TECHNOLOGY,2021,23.
APA	Zhou, Zhen.,Zhang, Tao.,Wu, Mingfu.,Ye, Kaixuan.,Zhong, Fubin.,...&Liu, Sanqiu.(2021).Experimental study of core and edge fluctuations by reflectometry on EAST tokamak.PLASMA SCIENCE & TECHNOLOGY,23.
MLA	Zhou, Zhen,et al."Experimental study of core and edge fluctuations by reflectometry on EAST tokamak".PLASMA SCIENCE & TECHNOLOGY 23(2021).