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DOI: 10.1002/2015GL063943
论文题名:
Laboratory investigation of lunar surface electric potentials in magnetic anomaly regions
作者: Howes C.T.; Wang X.; Deca J.; Horányi M.
刊名: Geophysical Research Letters
ISSN: 0094-9221
EISSN: 1944-8952
出版年: 2015
卷: 42, 期:11
起始页码: 4280
结束页码: 4287
语种: 英语
英文关键词: laboratory experiment ; lunar magnetic anomaly ; lunar swirls ; magnetic dipole field ; solar wind plasma ; surface potential
Scopus关键词: Dipole moment ; Electric potential ; Ions ; Laboratories ; Magnetic fields ; Magnetism ; Moon ; Surface potential ; Laboratory experiments ; Lunar magnetic anomalies ; lunar swirls ; Magnetic dipole fields ; Solar wind plasmas ; Magnetoplasma
英文摘要: To gain insight into lunar surface charging in the magnetic anomaly regions, we present the results of laboratory experiments with a flowing plasma engulfing a magnetic dipole field above an insulating surface. When the dipole moment is perpendicular to the surface, large positive potentials (close to ion flow energies in eV) are measured on the surface in the dipole lobe regions, charged by the unmagnetized ions while the electrons are magnetically excluded. The potential decreases exponentially with distance from the surface on the ion (flow) Debye length scale. The surface potentials become much smaller when the dipole moment is parallel to the surface, likely due to collisionality. We discuss the implications of our laboratory results for the lunar surface charging in the magnetic anomaly regions, suggesting that the surface potential may be much higher than the generally expected several volts positive due to photoemission. ©2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934301164&doi=10.1002%2f2015GL063943&partnerID=40&md5=b1c3a9ecbda69b1d8522e667891a605c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8837
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States

Recommended Citation:
Howes C.T.,Wang X.,Deca J.,et al. Laboratory investigation of lunar surface electric potentials in magnetic anomaly regions[J]. Geophysical Research Letters,2015-01-01,42(11).
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