Experimental observation of the localized coupling between geodesic acoustic mode and magnetic islands in tokamak plasmas

doi:10.1088/1741-4326/abd72d

	Experimental observation of the localized coupling between geodesic acoustic mode and magnetic islands in tokamak plasmas
	Xu, Ming 1; Kong, D. F.1; Liu, A. D.2; Liang, Y. F.1; Cai, H. S.2; Qiu, Z. Y.3; Chen, W.4; Shi, T. H.1; Duan, Y. M.1; Xiang, H. M.1
刊名	NUCLEAR FUSION
	2021-03-01
卷号	61
关键词	GAM twin counter-propagating BAEs magnetic islands nonlinear interaction
ISSN号	0029-5515
DOI	10.1088/1741-4326/abd72d
通讯作者	Kong, D. F.(kfkong@ipp.ac.cn) ; Liu, A. D.(lad@ustc.edu.cn)
英文摘要	The localized coupling among geodesic acoustic mode (GAM), tearing modes (TMs) and twin counter-propagating beta-induced Alfven eigenmodes (BAEs) waves has been investigated in the experimental advanced superconducting tokamak. Before the appearance of TMs, typical continuous GAM is observed through the multi-channel Doppler backscattering (DBS) diagnostic. The twin BAEs can be excited after the burst of magnetic islands, which are localized to the q = 4 rational surface that is confirmed by the measurement of DBS array, where the GAM and twin BAEs are observed synchronically at R approximate to 2.23 m (normalized radius rho approximate to 0.8). One reasonable excitation mechanism is proposed that the twin BAEs can be excited by the nonlinear interaction between GAM and magnetic islands. As the width of magnetic islands increases, the electromagnetic twin BAEs increase synchronically with the decreasing of electrostatic GAM, strongly suggesting that the electromagnetic components are pumped from three-wave interaction between electrostatic GAM and magnetic islands.
资助项目	National Nature Science Foundation of China[11975267] ; National Nature Science Foundation of China[U1967206] ; National Key Research and Development Program of China[2017YFE0300501] ; National Key Research and Development Program of China[2018YFE0304100] ; Institute of Energy, Hefei Comprehensive National Science Center[19KZS205] ; International Partnership Program of Chinese Academy of Sciences[Y16YZ17271] ; Users with Excellence Program of Hefei Science Center CAS[2020HSC-UE008]
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000621472800001
资助机构	National Nature Science Foundation of China ; National Key Research and Development Program of China ; Institute of Energy, Hefei Comprehensive National Science Center ; International Partnership Program of Chinese Academy of Sciences ; Users with Excellence Program of Hefei Science Center CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120469]
专题	中国科学院合肥物质科学研究院
通讯作者	Kong, D. F.; Liu, A. D.
作者单位	1.Chinese Acad Sci ASIPP, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230026, Anhui, Peoples R China 3.Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China 4.Southwestern Inst Phys, POB 432, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Xu, Ming,Kong, D. F.,Liu, A. D.,et al. Experimental observation of the localized coupling between geodesic acoustic mode and magnetic islands in tokamak plasmas[J]. NUCLEAR FUSION,2021,61.
APA	Xu, Ming.,Kong, D. F..,Liu, A. D..,Liang, Y. F..,Cai, H. S..,...&Wan, B. N..(2021).Experimental observation of the localized coupling between geodesic acoustic mode and magnetic islands in tokamak plasmas.NUCLEAR FUSION,61.
MLA	Xu, Ming,et al."Experimental observation of the localized coupling between geodesic acoustic mode and magnetic islands in tokamak plasmas".NUCLEAR FUSION 61(2021).