Influence of circulating energetic ions on MHD instabilities in negative magnetic shear plasma

doi:10.1088/1741-4326/ac2106

	Influence of circulating energetic ions on MHD instabilities in negative magnetic shear plasma
	Gao, Baofeng 1; Cai, Huishan 1; Gao, Xiang 1,2; Wan, Yuanxi 1,2
刊名	NUCLEAR FUSION
	2021-11-01
卷号	61
关键词	energetic ions double tearing mode EPM
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac2106
通讯作者	Cai, Huishan(hscai@mail.ustc.edu.cn)
英文摘要	The influence of circulating energetic ions (CEIs) on double tearing mode (DTM) is investigated by a global kinetic-MHD hybrid simulation. It is shown that the co-CEIs with a small orbit width have a destabilizing effect on the DTM. As the orbit width increases, this destabilizing effect is reduced. If the orbit width is large enough, the DTM is transformed to single tearing modes due to the co-CEIs, so the mode becomes more stable than the DTM without CEIs. The effect of the counter-CEIs with small orbit width is similar to that of the co-CEIs. For a large orbit width, the counter-CEIs also have a stabilizing effect. If the energetic ion beta is larger than a threshold, an energetic particle driven mode (EPM) is excited due to the resonance between counter-CEIs and the bulk plasma. The effects of energetic ion beta, orbit width and resistivity on this EPM are studied systematically. The onset threshold of EPM depends on the orbit width and resistivity. It decreases with orbit width increasing, while it increases with resistivity increasing. The mode transition from DTM to EPM with energetic ion beta increasing is also found for large orbit width.
资助项目	National Natural Science Foundation of China[11822505] ; National Natural Science Foundation of China[11835016] ; National Natural Science Foundation of China[12175277] ; National Natural Science Foundation of China[11975271] ; National Natural Science Foundation of China[11675257] ; Youth Innovation Promotion Association CAS ; Users with Excellence Program of Hefei Science Center CAS[2019HSC-UE013] ; Fundamental Research Funds for the Central Universities[WK3420000008] ; Collaborative Innovation Program of Hefei Science Center CAS[2019HSC-CIP014]
WOS关键词	INTERNAL KINK ; MAGNETOHYDRODYNAMIC MODES ; STABILIZATION ; OSCILLATIONS ; EXCITATION ; PARTICLES
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000708199900001
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Users with Excellence Program of Hefei Science Center CAS ; Fundamental Research Funds for the Central Universities ; Collaborative Innovation Program of Hefei Science Center CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125613]
专题	中国科学院合肥物质科学研究院
通讯作者	Cai, Huishan
作者单位	1.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Gao, Baofeng,Cai, Huishan,Gao, Xiang,et al. Influence of circulating energetic ions on MHD instabilities in negative magnetic shear plasma[J]. NUCLEAR FUSION,2021,61.
APA	Gao, Baofeng,Cai, Huishan,Gao, Xiang,&Wan, Yuanxi.(2021).Influence of circulating energetic ions on MHD instabilities in negative magnetic shear plasma.NUCLEAR FUSION,61.
MLA	Gao, Baofeng,et al."Influence of circulating energetic ions on MHD instabilities in negative magnetic shear plasma".NUCLEAR FUSION 61(2021).