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

doi:10.1088/2058-6272/aba23b

HFCAS OpenIR

	Toward modeling of the scrape-off layer currents induced by electrode biasing using 2D particle-in-cell simulations
	Zhang, Huaxiang 1,2; Li, Dehui1 ; Liang, Yunfeng 1,3
	2020-10-01
发表期刊	PLASMA SCIENCE & TECHNOLOGY
ISSN	1009-0630
通讯作者	Liang, Yunfeng(y.liang@ipp.cas.cn)
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.
关键词	scrape-off layer electrode biasing particle-in-cell
DOI	10.1088/2058-6272/aba23b
关键词[WOS]	DIVERTOR ; TRANSPORT
收录类别	SCI
语种	英语
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]
项目资助者	National Natural Science Foundation of China ; National Key R&D Program of China
WOS研究方向	Physics
WOS类目	Physics, Fluids & Plasmas
WOS记录号	WOS:000563238200001
出版者	IOP PUBLISHING LTD
引用统计	被引频次：3[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/334002/70609
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.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, Trilateral Euregio Cluster, D-52425 Julich, Germany
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	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).