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The influence of the photosheath on the very low energy electrons during active potential control
Zhoa, H.; Torkar, K.; Schmidt, R.; Riedler, W.; Escoubet, C. P.
Department太阳系探测联合研究中心
Source PublicationActive experiments in space plasmas - 1996 proceedings of the d0.6 symposium of cospar scientific commission d
1998
Pages745-748
Language英语
ISBN0273-1177;0-08-043458-4
AbstractA low and actively controlled electrostatic potential on the outer surface of a scientific spacecraft is very important for the accurate measurement of the cold plasma electrons and ions, A small potential barrier < 2 eV may emerge in the photoelectron sheath during the active potential control operation using energetic (some keV) ion beams. Although the measurement conditions are improved considerably, some very low energy electrons of the ambient plasma cannot overcome the potential barrier and return to the plasma. It is designated as the screen effect of the photosheath, In this paper, the relationship between the "hidden" low energy electron population and the parameters of the photosheath potential barrier, such as the height (< 2 eV) and position of the potential barrier, is analysed, The domains of the "hidden" and "detectable" ambient plasma electrons in the velocity space are presented.
Conference Name31st COSPAR Scientific Assembly on Active Experiments in Space Plasmas
Conference Date1998
Conference PlaceBirmingham, England
Indexed ByCPCI
Document Type会议论文
Identifierhttp://ir.nssc.ac.cn/handle/122/949
Collection空间科学部
Recommended Citation
GB/T 7714
Zhoa, H.,Torkar, K.,Schmidt, R.,et al. The influence of the photosheath on the very low energy electrons during active potential control[C]. OXFORD:Pergamon Press Ltd,1998:745-748.
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