Observation of non-thermal metastable ion velocity distributions in a miniaturized multi-dipole confined plasma device

doi:10.1063/5.0090948

	Observation of non-thermal metastable ion velocity distributions in a miniaturized multi-dipole confined plasma device
	Jiang, Di 2; Yip, Chi-Shung 2; Jin, Chen-Yao 1,2; Zhang, Wei 2; Wang, Liang 2; Xu, Guo-Sheng 2
刊名	PHYSICS OF PLASMAS
	2022-06-01
卷号	29
ISSN号	1070-664X
DOI	10.1063/5.0090948
通讯作者	Yip, Chi-Shung(csyip@ipp.ac.cn)
英文摘要	Hot cathode discharges are common plasma sources for fundamental plasma physics studies and other applications due to their capability to produce quiescent plasma. This work presents experimental observations of presheath-associated non-thermal metastable ion velocity distributions in a miniaturized multi-dipole confined plasma device measured by laser-induced fluorescence. The intensity of this non-Maxwellian component is related to the collisions of these metastable ions with background particles. Additionally, the flow velocity of this component is lower than the Bohm velocity; thus, its energy is lower than the presheath potential drop kT(e)/2. This implies that these non-thermal metastable ion velocity distributions are formed via presheath acceleration and are associated with the source asymmetries of the miniaturized device. The strength decreases as the neutral pressure increases once the neutral pressure is adjusted, suggesting that the presheath length is the critical condition that determines whether these components can be observed. Published under an exclusive license by AIP Publishing.
资助项目	National Natural Science Foundation of China[11875285] ; President Funding of Hefei Institutes of Physical Science, Chinese Academy of Sciences[YZJJ2022QN19]
WOS关键词	LASER-INDUCED FLUORESCENCE ; SHEATH
WOS研究方向	Physics
语种	英语
出版者	AIP Publishing
WOS记录号	WOS:000811841900005
资助机构	National Natural Science Foundation of China ; President Funding of Hefei Institutes of Physical Science, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/129544]
专题	中国科学院合肥物质科学研究院
通讯作者	Yip, Chi-Shung
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Di,Yip, Chi-Shung,Jin, Chen-Yao,et al. Observation of non-thermal metastable ion velocity distributions in a miniaturized multi-dipole confined plasma device[J]. PHYSICS OF PLASMAS,2022,29.
APA	Jiang, Di,Yip, Chi-Shung,Jin, Chen-Yao,Zhang, Wei,Wang, Liang,&Xu, Guo-Sheng.(2022).Observation of non-thermal metastable ion velocity distributions in a miniaturized multi-dipole confined plasma device.PHYSICS OF PLASMAS,29.
MLA	Jiang, Di,et al."Observation of non-thermal metastable ion velocity distributions in a miniaturized multi-dipole confined plasma device".PHYSICS OF PLASMAS 29(2022).