Simulations of first-orbit losses of neutral beam injection (NBI) fast ions on EAST

doi:10.1088/2058-6272/ab8973

	Simulations of first-orbit losses of neutral beam injection (NBI) fast ions on EAST
	Xu, Xingyuan; Xu, Yingfeng; Zhang, Xiaodong; Hu, Youjun; Ye, Lei; Xiao, Xiaotao
刊名	PLASMA SCIENCE & TECHNOLOGY
	2020-08-01
卷号	22
关键词	neutral beam first-orbit loss GYCAVA
ISSN号	1009-0630
DOI	10.1088/2058-6272/ab8973
通讯作者	Xu, Yingfeng(xuyingfeng@ipp.ac.cn) ; Zhang, Xiaodong(xdzhang@ipp.ac.cn)
英文摘要	Simulations of first-orbit losses of neutral beam injection (NBI) fast ions in the EAST tokamak have been studied in detail by using the orbit-following code GYCAVA and the NBI code TGCO. Beam ion losses with the wall boundary are smaller than those with the last closed flux surface boundary. In contrast to heat loads on the wall without radio frequency wave (RFW) antennas, heat loads on the wall with RFW antennas are distributed more locally near the RFW antennas. The direction of the toroidal magnetic field dramatically affects the final positions of lost fast ions, which is related to the magnetic drift. The numerical results on heat loads of beam ions corresponding to different toroidal magnetic fields are qualitatively consistent with the experimental results. Beam ion losses increase with the beam energy for the co-current NBIs and the counter-perpendicular NBI. We have studied the behavior of fast ions produced by a small section neutral beam (beamlet) by using the numerical tool NBIT. The distributions of the loss fraction of beamlet fast ions peaked near the edge of the beam section for the counter-current NBIs, and they are related to the injection angle. This indicates that the first-orbit losses can be reduced by changing the shape of beam cross section.
资助项目	National Natural Science Foundation of China[11775265] ; EAST team
WOS关键词	PLASMA EDGE ; ORBIT LOSS ; TOKAMAK
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000536946200001
资助机构	National Natural Science Foundation of China ; EAST team
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103233]
专题	中国科学院合肥物质科学研究院
通讯作者	Xu, Yingfeng; Zhang, Xiaodong
作者单位	Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Xu, Xingyuan,Xu, Yingfeng,Zhang, Xiaodong,et al. Simulations of first-orbit losses of neutral beam injection (NBI) fast ions on EAST[J]. PLASMA SCIENCE & TECHNOLOGY,2020,22.
APA	Xu, Xingyuan,Xu, Yingfeng,Zhang, Xiaodong,Hu, Youjun,Ye, Lei,&Xiao, Xiaotao.(2020).Simulations of first-orbit losses of neutral beam injection (NBI) fast ions on EAST.PLASMA SCIENCE & TECHNOLOGY,22.
MLA	Xu, Xingyuan,et al."Simulations of first-orbit losses of neutral beam injection (NBI) fast ions on EAST".PLASMA SCIENCE & TECHNOLOGY 22(2020).