Toward modeling of the scrape-off layer currents induced by electrode biasing using 2D particle-in-cell simulations

doi:10.1088/2058-6272/aba23b

	Toward modeling of the scrape-off layer currents induced by electrode biasing using 2D particle-in-cell simulations
	Zhang, Huaxiang 2,3; Li, Dehui 3; Liang, Yunfeng 1,3
刊名	PLASMA SCIENCE & TECHNOLOGY
	2020-10-01
卷号	22
关键词	scrape-off layer electrode biasing particle-in-cell
ISSN号	1009-0630
DOI	10.1088/2058-6272/aba23b
通讯作者	Liang, Yunfeng(y.liang@ipp.cas.cn)
英文摘要	The property of scrape-off layer (SOL) currents induced by a biased electrode is investigated by fully kinetic collisionless two-dimensional particle-in-cell (PIC) simulations. A reduced Vlasov-Darwin model is employed, which is capable of describing the low-frequency kinetic behavior without electromagnetic vacuum modes (omega(2) = omega(2)(pe)+c(2)k(2)). A linear decay distribution of electron currents parallel to the background magnetic field is exhibited. Simulation analyses indicate that the cross field ion current is a key factor in sheath formation and global current balance. The influences of electrode area, biasing voltage and plasma source on the SOL current profile are studied, respectively. Characteristic plasma parameters in the far SOL region of the EAST tokamak are used in simulations to assess the current driving ability of the electrode biasing method. Due to the limitations of computational power, the geometrical size of the simulation domain is significantly smaller than the realistic SOL, which may lead to an absence of the quasi-neutral region in the upstream plasma. At last, a heuristic method is proposed to calculate the upper bound of the total current strength.
资助项目	National Natural Science Foundation of China[51828101] ; National Natural Science Foundation of China[11875294] ; National Key R&D Program of China[2017YFE0301100]
WOS关键词	DIVERTOR ; TRANSPORT
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000563238200001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/70609]
专题	中国科学院合肥物质科学研究院
通讯作者	Liang, Yunfeng
作者单位	1.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, Trilateral Euregio Cluster, D-52425 Julich, Germany 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Huaxiang,Li, Dehui,Liang, Yunfeng. Toward modeling of the scrape-off layer currents induced by electrode biasing using 2D particle-in-cell simulations[J]. PLASMA SCIENCE & TECHNOLOGY,2020,22.
APA	Zhang, Huaxiang,Li, Dehui,&Liang, Yunfeng.(2020).Toward modeling of the scrape-off layer currents induced by electrode biasing using 2D particle-in-cell simulations.PLASMA SCIENCE & TECHNOLOGY,22.
MLA	Zhang, Huaxiang,et al."Toward modeling of the scrape-off layer currents induced by electrode biasing using 2D particle-in-cell simulations".PLASMA SCIENCE & TECHNOLOGY 22(2020).