Particle-in-cell simulations of heat flux to tokamak divertors in an oblique magnetic field

doi:10.1088/1361-6587/abe6b6

HFCAS OpenIR

	Particle-in-cell simulations of heat flux to tokamak divertors in an oblique magnetic field
	Men,Zongzheng 1,2; Xiang,Nong 1; Ou,Jing1 ; Wang,Xueyi 3
	2021-03-18
发表期刊	Plasma Physics and Controlled Fusion
ISSN	0741-3335
通讯作者	Xiang,Nong()
摘要	Abstract The management of excessive heat flux to tokamak divertors is one of the most important issues, especially for long-pulse operations of EAST. Different simulation codes based mainly on fluid models have been developed to study the physical processes in edge plasma, including the heat flux to divertor target plates. In these simulations, only the neutral region is included and the heat flux is estimated by using energy transmission coefficients based on a simplified sheath model. In this paper, particle-in-cell simulations are conducted to study the heat flux flowing to the EAST divertor target plates by taking the sheath into account. It is found that the parallel electron velocity distribution function (VDF) in the sheath is a cut-off Maxwellian distribution so the electron sheath energy transmission can be obtained analytically, while ion VDFs in the sheath strongly depend on the incident angle between the magnetic field and divertor target plates. For a small incident angle, in the sheath, the ions move along open orbits and are accelerated mainly in the direction perpendicular to the plane formed by the magnetic field and target plates due to the Lorentz force. An analytical expression for the ion heat flux to the target plates is presented and the obtained results are in good agreement with the simulation results.
关键词	heat flux magnetic sheath particle-in-cell simulation
DOI	10.1088/1361-6587/abe6b6
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFE0300406] ; National Natural Science Foundation of China[11975272]
项目资助者	National Key R&D Program of China ; National Natural Science Foundation of China
WOS研究方向	Physics
WOS类目	Physics, Fluids & Plasmas
WOS记录号	IOP:0741-3335-63-4-abe6b6
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/120718
专题	中国科学院合肥物质科学研究院
通讯作者	Xiang,Nong
作者单位	1.Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 2.University of Science and Technology of China, Hefei 230026, People’s Republic of China 3.Physics Department, Auburn University, Auburn, AL, United States of America
推荐引用方式 GB/T 7714	Men,Zongzheng,Xiang,Nong,Ou,Jing,et al. Particle-in-cell simulations of heat flux to tokamak divertors in an oblique magnetic field[J]. Plasma Physics and Controlled Fusion,2021,63.
APA	Men,Zongzheng,Xiang,Nong,Ou,Jing,&Wang,Xueyi.(2021).Particle-in-cell simulations of heat flux to tokamak divertors in an oblique magnetic field.Plasma Physics and Controlled Fusion,63.
MLA	Men,Zongzheng,et al."Particle-in-cell simulations of heat flux to tokamak divertors in an oblique magnetic field".Plasma Physics and Controlled Fusion 63(2021).