Simulations of the radial electric field induced by neutral beam injection in a tokamak

doi:10.1088/1741-4326/ac054d

	Simulations of the radial electric field induced by neutral beam injection in a tokamak
	Xu,Xingyuan 1,4; Xu,Yingfeng 2,3; Zhang,Xiaodong 4; Hu,Youjun 4
刊名	Nuclear Fusion
	2021-06-24
卷号	61
关键词	ion orbit loss polarization density radial electric field neutral beam injection
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac054d
通讯作者	Xu,Yingfeng() ; Zhang,Xiaodong()
英文摘要	AbstractA model based on Poisson’s equation has been proposed to study the radial electric field induced by neutral beam injection (NBI). The radial electric field is produced by charge separation of beam induced electrons and beam ions. The charge separation is produced by redistribution and loss of NBI ions, which is due to the magnetic drift and collision effects. The birth and steady-state distributions of NBI fast ions related to charge separation were numerically computed by the orbit code GYCAVA and the NBI code TGCO. According to our model, the neoclassical polarization density of bulk ions has a great shielding effect on the radial electric field due to charge separation. The simulation results show that NBI ions can produce a significant radial electric field (～10 kV m?1) in the core region. The counter-current NBI (injection anti-parallel to the plasma current) can produce a negative radial electric field, which is due to the magnetic drift and collision effects of NBI ions. While the co-current injection (injection parallel to the plasma current) produces a positive radial electric field in the core region, which is mainly related to the magnetic drift of NBI ions. The dependence of the radial electric field on the injection direction and the beam energy of NBI has been investigated. As the beam energy increases, the magnitudes of the electric field for counter-injections increase and the magnitude of the electric field for co-current perpendicular injection decrease.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0029-5515-61-8-AC054D
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123990]
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	1.University of Science and Technology of China, Hefei 230026, China 2.College of Science, Donghua University, Shanghai 201620, China 3.Member of Magnetic Confinement Fusion Research Centre, Ministry of Education, Donghua University, China 4.Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
推荐引用方式 GB/T 7714	Xu,Xingyuan,Xu,Yingfeng,Zhang,Xiaodong,et al. Simulations of the radial electric field induced by neutral beam injection in a tokamak[J]. Nuclear Fusion,2021,61.
APA	Xu,Xingyuan,Xu,Yingfeng,Zhang,Xiaodong,&Hu,Youjun.(2021).Simulations of the radial electric field induced by neutral beam injection in a tokamak.Nuclear Fusion,61.
MLA	Xu,Xingyuan,et al."Simulations of the radial electric field induced by neutral beam injection in a tokamak".Nuclear Fusion 61(2021).