Ion energy distribution in a radio frequency sheath of plasma with Kappa electron velocity distribution
Ou, Jing1,3; Huang, Yueheng1,2
刊名CONTRIBUTIONS TO PLASMA PHYSICS
2020-10-19
关键词ion energy distribution Kappa distribution radio frequency sheath
ISSN号0863-1042
DOI10.1002/ctpp.202000108
英文摘要

A hybrid model consisting of a one-dimensional radio frequency sheath model and an equivalent circuit model is used to investigate the effect of the non-Maxwellian plasma with enhanced electron tails on ion energy distribution (IED) at the plasma-wall interface. With the assumption that electrons obey the Kappa distribution in which the parameter kappa characterizes the deviation from Maxwellian distribution, the bimodal shape of the IED can always be found with the decrease of kappa under the condition of current experimental advanced superconducting tokamak (EAST) discharges during the ion cyclotron range of frequency wave heating. However, the height of the low-energy peak of the IED decreases, while the high-energy peak does not change significantly. In addition, the IED shifts towards the higher-energy regime, and the width of the IED expands with the decrease of kappa. It is also shown that frequency and amplitude of the disturbance current, bulk plasma density, and ion temperature are the crucial parameters for determining the shape of IED even in the presence of super-thermal electrons.

资助项目National Key R&D Program of China[2017YFE0300400] ; National Natural Science Foundation of China[11775257] ; National Natural Science Foundation of China[11805113]
WOS研究方向Physics
语种英语
出版者WILEY-V C H VERLAG GMBH
WOS记录号WOS:000581039600001
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/334002/104588]  
专题中国科学院合肥物质科学研究院
通讯作者Ou, Jing
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
2.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen, Peoples R China
3.Chinese Acad Sci, Ctr Magnet Fus Theory, Hefei, Peoples R China
推荐引用方式
GB/T 7714
Ou, Jing,Huang, Yueheng. Ion energy distribution in a radio frequency sheath of plasma with Kappa electron velocity distribution[J]. CONTRIBUTIONS TO PLASMA PHYSICS,2020.
APA Ou, Jing,&Huang, Yueheng.(2020).Ion energy distribution in a radio frequency sheath of plasma with Kappa electron velocity distribution.CONTRIBUTIONS TO PLASMA PHYSICS.
MLA Ou, Jing,et al."Ion energy distribution in a radio frequency sheath of plasma with Kappa electron velocity distribution".CONTRIBUTIONS TO PLASMA PHYSICS (2020).
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