Power law fitting of the ion saturation current and the three-temperature Maxwellian EEDF in a multi-dipole confined hot cathode discharge: an experimental revisitation

doi:10.1088/1361-6595/ac5c61

	Power law fitting of the ion saturation current and the three-temperature Maxwellian EEDF in a multi-dipole confined hot cathode discharge: an experimental revisitation
	Yip, Chi-Shung 1; Jin, Chenyao 1,2; Zhan, Wei 1; Jiang, Di 1; Xu, Guo-Sheng 1
刊名	PLASMA SOURCES SCIENCE & TECHNOLOGY
	2022-04-01
卷号	31
关键词	Langmuir probes EEDF hot cathode discharges multi-dipole confinement
ISSN号	0963-0252
DOI	10.1088/1361-6595/ac5c61
通讯作者	Yip, Chi-Shung(csyip@ipp.ac.cn) ; Zhan, Wei(zhangwei@ipp.ac.cn)
英文摘要	Langmuir probe diagnostic in a multi-dipole confined hot cathode discharge has been revisited with an improved sheath expansion model with fitted expansion parameters. The results show a three-temperature Maxwellian EEDF composition also observed in previous studies using a very similar system. The dependence on neutral pressure and discharge current of each electron species are consistent with known physical processes in a multi-dipole confined hot cathode discharge. This shows that the employment of the new ion saturation fitting method does not eliminate the contribution of the high energy degraded primaries to the Langmuir probe I-V trace, as sheath expansion and high energy electron current contributes differently on an I-V trace. The result remains supportive to the existence of a very hot (T (dp) > 15 eV) degraded primary electron species separate from the typical hot electron (T (hot) similar to 3 eV) species. Thus it is recommended to sweep the Langmuir probe beyond the bias voltage of the hot cathode, whenever possible, in order to properly resolve the contribution to the I-V trace of the degraded primaries.
资助项目	National Natural Science Foundation of China[11875285]
WOS关键词	ENERGY-DISTRIBUTION FUNCTION ; ELECTRON-ENERGY ; BOHM CRITERION ; RF DISCHARGE ; PLASMA ; TRANSITION ; SIMULATOR
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000780040100001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128675]
专题	中国科学院合肥物质科学研究院
通讯作者	Yip, Chi-Shung; Zhan, Wei
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Yip, Chi-Shung,Jin, Chenyao,Zhan, Wei,et al. Power law fitting of the ion saturation current and the three-temperature Maxwellian EEDF in a multi-dipole confined hot cathode discharge: an experimental revisitation[J]. PLASMA SOURCES SCIENCE & TECHNOLOGY,2022,31.
APA	Yip, Chi-Shung,Jin, Chenyao,Zhan, Wei,Jiang, Di,&Xu, Guo-Sheng.(2022).Power law fitting of the ion saturation current and the three-temperature Maxwellian EEDF in a multi-dipole confined hot cathode discharge: an experimental revisitation.PLASMA SOURCES SCIENCE & TECHNOLOGY,31.
MLA	Yip, Chi-Shung,et al."Power law fitting of the ion saturation current and the three-temperature Maxwellian EEDF in a multi-dipole confined hot cathode discharge: an experimental revisitation".PLASMA SOURCES SCIENCE & TECHNOLOGY 31(2022).