Numerical simulations of NBI fast ion loss with RMPs on the EAST tokamak

doi:10.1088/1741-4326/ab966b

	Numerical simulations of NBI fast ion loss with RMPs on the EAST tokamak
	Xu, Yingfeng 4; Li, Li 2,3; Hu, Youjun 4; Liu, Yueqiang 1,4; Guo, Wenfeng 4; Ye, Lei 4; Xiao, Xiaotao 4
刊名	NUCLEAR FUSION
	2020-08-01
卷号	60
关键词	resonant magnetic perturbation neutral beam injection fast ion loss orbit-following code EAST
ISSN号	0029-5515
DOI	10.1088/1741-4326/ab966b
通讯作者	Xu, Yingfeng(xuyingfeng@ipp.ac.cn)
英文摘要	Fast ion losses in the presence of resonant magnetic perturbations (RMPs) on the EAST tokamak have been simulated by using the Monte Carlo orbit-following code GYCAVA (Xuet al2019Comput. Phys. Comm.24440). Fast ions produced by the co-current tangential neutral beam injection (NBI) were considered. The initial distribution of NBI fast ions was numerically computed by the TGCO code and then = 1 vacuum and response RMP fields were numerically computed by the MHD code MARS-F (Liuet al2000Phys. Plasmas73681). It is found that fast ion losses increase almost linearly with the RMP coil current. Poincare plots show that fast ion losses in the presence of RMPs on EAST are mainly due to the orbit stochasticity induced by RMPs. The collision effect, including the slowing down and the pitch angle scattering, on fast ion losses have also been numerically studied. The synergy effect of RMPs and collision-induced pitch angle scattering can enhance the particle loss of fast ions. The collision effect, including the effective ion charge number effect, on the power loss of fast ions is weak. Fast ion losses increase with the effective ion charge number increasing, which is related to the pitch angle scattering effect. The plasma response to RMPs can enhance or reduce fast ion losses. The plasma response effect on fast ion losses depends on the RMP coil phasing, that is, the phase difference between the upper and lower coils. The heat loads on the outer wall clearly follow then = 1 periodicity of the RMP coil configuration. Positions of maximum heat loads are closely related to the coil phasing of RMPs. These mean that the magnetic topology of RMPs is responsible for the toroidal distribution of heat loads.
资助项目	National Natural Science Foundation of China[11775265] ; National Natural Science Foundation of China[11775268] ; National Key R&D Program of China[2017YFE0300402] ; EAST team
WOS关键词	PARTICLE ; RIPPLE
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000553148100001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; EAST team
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/70938]
专题	中国科学院合肥物质科学研究院
通讯作者	Xu, Yingfeng
作者单位	1.Gen Atom, POB 85608, San Diego, CA 92186 USA 2.Minist Educ, Magnet Confinement Fus Res Ctr, Beijing, Peoples R China 3.Donghua Univ, Coll Sci, Shanghai 201620, Peoples R China 4.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Xu, Yingfeng,Li, Li,Hu, Youjun,et al. Numerical simulations of NBI fast ion loss with RMPs on the EAST tokamak[J]. NUCLEAR FUSION,2020,60.
APA	Xu, Yingfeng.,Li, Li.,Hu, Youjun.,Liu, Yueqiang.,Guo, Wenfeng.,...&Xiao, Xiaotao.(2020).Numerical simulations of NBI fast ion loss with RMPs on the EAST tokamak.NUCLEAR FUSION,60.
MLA	Xu, Yingfeng,et al."Numerical simulations of NBI fast ion loss with RMPs on the EAST tokamak".NUCLEAR FUSION 60(2020).