Direct measurement of ion and electron flux ratio at their respective sheath-edges and absence of the electron Bohm criterion effects

doi:10.1088/1361-6595/ac9b8d

	Direct measurement of ion and electron flux ratio at their respective sheath-edges and absence of the electron Bohm criterion effects
	Jin, Chenyao 1,2; Yip, Chi-Shung 1; Zhang, Wei 1; Jiang, Di 1; Xu, Guo-Sheng 1
刊名	PLASMA SOURCES SCIENCE & TECHNOLOGY
	2022-11-01
卷号	31
关键词	sheath presheath electron sheath ion electron loss balance
ISSN号	0963-0252
DOI	10.1088/1361-6595/ac9b8d
通讯作者	Jin, Chenyao() ; Yip, Chi-Shung(csyip@ipp.ac.cn) ; Zhang, Wei(zhangwei@ipp.ac.cn)
英文摘要	A recent theory suggests that electrons enter electron sheaths at an electron Bohm velocity given by (T (e)/m (e))(1/2) instead of the electron thermal velocity as conventionally assumed. To test this theory, the flux density ratio Gamma(e,se)/Gamma(i,se) of electrons and ions entering their respective sheaths was directly measured via an almost continuous A (i)/A (e) area ratio scanning. The measured value agrees with the predictions assuming electrons entering the electron sheaths at their thermal velocity. The predictions associated with the electron Bohm criterion have not been found. If the predictions of such theories are true, the electron or ion presheath density drops will be very different from conventionally expected values.
资助项目	Chinese Academy of Science Hundred Youth Talent Program ; National Natural Science Foundation of China[11875285] ; China Postdoctoral Science Foundation[2022M713188] ; Hefei Institutes of Physical Science, Chinese Academy of Sciences[YZJJ2022QN19]
WOS关键词	RF DISCHARGE ; PLASMA ; BOUNDARY ; TRANSITION ; PRESHEATH ; VALIDITY ; ENERGY ; RANGE
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000882166400001
资助机构	Chinese Academy of Science Hundred Youth Talent Program ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; 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/334002/130361]
专题	中国科学院合肥物质科学研究院
通讯作者	Jin, Chenyao; Yip, Chi-Shung; Zhang, Wei
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, 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	Jin, Chenyao,Yip, Chi-Shung,Zhang, Wei,et al. Direct measurement of ion and electron flux ratio at their respective sheath-edges and absence of the electron Bohm criterion effects[J]. PLASMA SOURCES SCIENCE & TECHNOLOGY,2022,31.
APA	Jin, Chenyao,Yip, Chi-Shung,Zhang, Wei,Jiang, Di,&Xu, Guo-Sheng.(2022).Direct measurement of ion and electron flux ratio at their respective sheath-edges and absence of the electron Bohm criterion effects.PLASMA SOURCES SCIENCE & TECHNOLOGY,31.
MLA	Jin, Chenyao,et al."Direct measurement of ion and electron flux ratio at their respective sheath-edges and absence of the electron Bohm criterion effects".PLASMA SOURCES SCIENCE & TECHNOLOGY 31(2022).