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Work function measurements of olivine: Implication to photoemission charging properties in planetary environments
Hong Gan; Xiongyao Li; Guangfei Wei; Shijie Wang
2015
发表期刊Advances in Space Research
卷号56期号:11页码:2432-2438
摘要For understanding the ubiquitous photoemission charging of solid surface in planetary environments, it is important to characterize the photoemission charging properties of silicate minerals such as the work function. In this study, we measured the work function of olivine mineral based on the measurements of contact potential difference by using an ultrahigh vacuum Kelvin probe force microscopy. Our results showed that work function on olivine mineral surface is mainly affected by surface morphology and crystal orientation and that the variation range of work function is 7.3-8.5 eV. It implicates that photoemission of the olivine mineral occurs under the X-ray and solar ultraviolet irradiation with wavelength of <171 nm. Consequently, it is possible to form electrostatic field of +(5-10) V on the sunlit planet, moon or asteroid surfaces due to dust photoemission charging, which even induces the migration of dust grains and the formation of dust-plasma atmosphere. Those are important problems worried to be solved for future lunar missions. Additionally, our work can help to instruct the dust mitigation technology and the electrostatic beneficiation in future space missions.
关键词Planet Moon Photoemission Olivine Work Function
学科领域月球与行星科学
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/352002/6060
专题月球与行星科学研究中心_月球与行星科学研究中心_期刊论文
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Hong Gan,Xiongyao Li,Guangfei Wei,et al. Work function measurements of olivine: Implication to photoemission charging properties in planetary environments[J]. Advances in Space Research,2015,56(11):2432-2438.
APA Hong Gan,Xiongyao Li,Guangfei Wei,&Shijie Wang.(2015).Work function measurements of olivine: Implication to photoemission charging properties in planetary environments.Advances in Space Research,56(11),2432-2438.
MLA Hong Gan,et al."Work function measurements of olivine: Implication to photoemission charging properties in planetary environments".Advances in Space Research 56.11(2015):2432-2438.
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