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

doi:10.1088/1361-6587/abe6b6

	Particle-in-cell simulations of heat flux to tokamak divertors in an oblique magnetic field
	Men,Zongzheng 1,2; Xiang,Nong 1; Ou,Jing 1; Wang,Xueyi 3
刊名	Plasma Physics and Controlled Fusion
	2021-03-18
卷号	63
关键词	heat flux magnetic sheath particle-in-cell simulation
ISSN号	0741-3335
DOI	10.1088/1361-6587/abe6b6
通讯作者	Xiang,Nong()
英文摘要	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.
资助项目	National Key R&D Program of China[2017YFE0300406] ; National Natural Science Foundation of China[11975272]
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0741-3335-63-4-ABE6B6
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120717]
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).