Structure bifurcation induced by wide magnetic islands

doi:10.1088/1741-4326/ab7d1a

	Structure bifurcation induced by wide magnetic islands
	Hu, Z. Q.1,2; Wang, Z. X.3; Wei, L.3; Li, J. Q.4; Kishimoto, Y.5; Lin, X. D.1; Gao, X.6
刊名	NUCLEAR FUSION
	2020-05-01
卷号	60
关键词	magnetic island zonal flow multi-scale interaction MHD instability
ISSN号	0029-5515
DOI	10.1088/1741-4326/ab7d1a
通讯作者	Wei, L.(laiwei@dlut.edu.cn)
英文摘要	Magnetic islands resulting from magnetic reconnection play significantly important roles in critical issues of magnetic fusion plasmas, because they essentially change magnetic topology and significantly degrade plasma confinement. In this paper, we report that the wide islands can lead to a structure bifurcation of flow parity inside islands, then induce a state with a large vortex flow. The mechanism is identified as an instability in the configuration with magnetic islands, in which the eigenmode parity is contrary to the conventional tearing mode and the radial profile of zonal flow also changes. The critical values of the width of magnetic island for the bifurcation are obtained and discussed. The dependence of bifurcation on various physical parameters is studied in detail. It is found that tearing instability parameter Delta '
资助项目	National Natural Science Foundation of China[11675038] ; National Natural Science Foundation of China[11805135] ; Fundamental Research Funds for the Central Universities[DUT18ZD101] ; Dalian Youth Science and Technology Project Support Program[2015R01] ; International Partnership Program of Chinese Academy of Sciences[Y16YZ17271]
WOS关键词	RADIAL ELECTRIC-FIELD
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000528752100001
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Dalian Youth Science and Technology Project Support Program ; International Partnership Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103367]
专题	中国科学院合肥物质科学研究院
通讯作者	Wei, L.
作者单位	1.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China 2.Shenzhen Univ, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China 3.Dalian Univ Technol, Sch Phys, Key Lab Mat Modificat Beams, Minist Educ, Dalian 116024, Peoples R China 4.Southwestern Inst Phys, Chengdu 610041, Peoples R China 5.Kyoto Univ, Grad Sch Energy Sci, Uji, Kyoto 6110011, Japan 6.Chinese Acad Sci, Inst Plasma Phys, Hefei 330031, Peoples R China
推荐引用方式 GB/T 7714	Hu, Z. Q.,Wang, Z. X.,Wei, L.,et al. Structure bifurcation induced by wide magnetic islands[J]. NUCLEAR FUSION,2020,60.
APA	Hu, Z. Q..,Wang, Z. X..,Wei, L..,Li, J. Q..,Kishimoto, Y..,...&Gao, X..(2020).Structure bifurcation induced by wide magnetic islands.NUCLEAR FUSION,60.
MLA	Hu, Z. Q.,et al."Structure bifurcation induced by wide magnetic islands".NUCLEAR FUSION 60(2020).