Modelling and application of a new method to measure the non-thermal electron current in the edge of magnetically confined plasma

doi:10.1088/1741-4326/ac2aba

HFCAS OpenIR

	Modelling and application of a new method to measure the non-thermal electron current in the edge of magnetically confined plasma
	Liu, S. C.1; Liang, Y.1,2; Zhang, H. X.1,3; Yan, N.1 ; Liao, L.1,3; Zhang, X. X.1,3; Liu, X. J.1; Wei, W. Y.1,3; Zhao, N.4; Chen, L.1 ; Chen, R.1 ; Hu, G. H.1; Ming, T. F.1; Sun, Y.1 ; Qian, J. P.1; Zeng, L.1; Li, G. Q.1; Wang, L.1 ; Xu, G. S.1; Gong, X. Z.1; Gao, X.1
	2021-12-01
发表期刊	NUCLEAR FUSION
ISSN	0029-5515
通讯作者	Liang, Y.(y.liang@fz-juelich.de) ; Yan, N.(yanning@ipp.ac.cn)
摘要	The non-thermal electrons could form considerable current in the edge plasma of tokamak and stellarator. A new method, named directional electron probe (DEP), is proposed to measure the edge non-thermal electron current in magnetically confined plasma. The DEP consists of two opposite channels whose connection line aligns with the local magnetic field line. Each channel has a hole with small radial width and enough thickness to block high energy ions due to their large Larmor radii, and at the end of the hole the collector is biased to positive voltage to repel low energy ions. In this way, the collected current of DEP is mainly contributed by electrons. A particle orbit simulation is performed based on the Boris algorithm, which demonstrates the validity and rationality of the DEP. According to the simulation, the ion collection probability is quite small if compared with the electron collection probability, consequently the collected current is mainly contributed by electrons. The collected currents of thermal electrons under Maxwell-Boltzmann distribution from both channels are almost equal, and the net current is driven by non-thermal electrons. A radial array of DEP has been successfully applied to the scrape-off layer (SOL) non-thermal electron current measurement in EAST. The amplitude and structure of the non-thermal electron current are observed during the lower hybrid wave heating phase. The experimental SOL net current is compared with the simulated net current from a rough estimation, revealing the same radial structure of SOL current and demonstrating the validity of DEP.
关键词	non-thermal electron SOL current directional electron probe Boris push plasma EAST
DOI	10.1088/1741-4326/ac2aba
关键词[WOS]	ION TEMPERATURE ; TOKAMAK PLASMA ; MACH PROBE
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[11875294] ; National Natural Science Foundation of China[11875292] ; National Natural Science Foundation of China[11922513] ; National Natural Science Foundation of China[U19A20113] ; National Natural Science Foundation of China[11975271] ; National MCF Energy R D Program[2017YFE0301100] ; National MCF Energy R D Program[2019YFE03040000] ; National MCF Energy R D Program[2019YFE03030000] ; National MCF Energy R D Program[2017YFE0301300] ; Users with Excellence Program of Hefei Science Center, CAS[2021HSC-UE014]
项目资助者	National Natural Science Foundation of China ; National MCF Energy R D Program ; Users with Excellence Program of Hefei Science Center, CAS
WOS研究方向	Physics
WOS类目	Physics, Fluids & Plasmas
WOS记录号	WOS:000709985400001
出版者	IOP Publishing Ltd
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/125592
专题	中国科学院合肥物质科学研究院
通讯作者	Liang, Y.; Yan, N.
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, Trilateral Euregio Cluster TEC, D-52425 Julich, Germany 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Southwest Univ Sci & Technol, Sch Sci, Mianyang 621010, Sichuan, Peoples R China
第一作者单位	中科院等离子体物理研究所
通讯作者单位	中科院等离子体物理研究所
推荐引用方式 GB/T 7714	Liu, S. C.,Liang, Y.,Zhang, H. X.,et al. Modelling and application of a new method to measure the non-thermal electron current in the edge of magnetically confined plasma[J]. NUCLEAR FUSION,2021,61.
APA	Liu, S. C..,Liang, Y..,Zhang, H. X..,Yan, N..,Liao, L..,...&Gao, X..(2021).Modelling and application of a new method to measure the non-thermal electron current in the edge of magnetically confined plasma.NUCLEAR FUSION,61.
MLA	Liu, S. C.,et al."Modelling and application of a new method to measure the non-thermal electron current in the edge of magnetically confined plasma".NUCLEAR FUSION 61(2021).