Roles of primary and sideband resonances in the confinement of energetic passing ions under resonant magnetic perturbations

doi:10.1088/1741-4326/abb422

	Roles of primary and sideband resonances in the confinement of energetic passing ions under resonant magnetic perturbations
	He, K.1,2; Sun, Y.1; Wan, B. N.1; Gu, S.1; Jia, M.1
刊名	NUCLEAR FUSION
	2020-12-01
卷号	60
关键词	fast ion RMP plasma response resonance
ISSN号	0029-5515
DOI	10.1088/1741-4326/abb422
通讯作者	Sun, Y.(ywsun@ipp.ac.cn)
英文摘要	Numerical simulations have been carried out to study how resonant magnetic perturbation (RMP) affects the loss of energetic passing ions. The loss fractions are compared between RMPs without and with the plasma response included, namely vacuum and response RMPs. The significant role of the RMP spectrum is revealed. More interestingly, inclusion of the plasma response, which to a large extent heals the magnetic topology, does not necessarily lead to a better confinement. In order to better interpret the result, it is crucial to clarify how the RMP spectrum affects drift islands. Due to magnetic drift, the structure of drift islands is essentially different from the magnetic topology. The primary contribution from resonant components and the sideband contribution from non-resonant components are compared in detail for the first time by tailoring the RMP spectrum. It is found that both contributions play an important role in the formation of drift islands under a realistic RMP. In particular, when an island chain is closer to the plasma boundary, the sideband contribution is more dominant, which is closely related to the radial profiles of non-resonant components. In the presence of a plasma response, sideband resonance becomes even more dominant and can still result in large drift islands, which may be a critical factor for the confinement of energetic passing ions in future discharges.
资助项目	National Key R&D Program of China[2017YFE0301100] ; National Natural Science Foundation of China[11875292] ; National Natural Science Foundation of China[11805237]
WOS关键词	TRANSPORT
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000577204800001
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/334002/104470]
专题	中国科学院合肥物质科学研究院
通讯作者	Sun, Y.
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	He, K.,Sun, Y.,Wan, B. N.,et al. Roles of primary and sideband resonances in the confinement of energetic passing ions under resonant magnetic perturbations[J]. NUCLEAR FUSION,2020,60.
APA	He, K.,Sun, Y.,Wan, B. N.,Gu, S.,&Jia, M..(2020).Roles of primary and sideband resonances in the confinement of energetic passing ions under resonant magnetic perturbations.NUCLEAR FUSION,60.
MLA	He, K.,et al."Roles of primary and sideband resonances in the confinement of energetic passing ions under resonant magnetic perturbations".NUCLEAR FUSION 60(2020).