Physics – Plasma Physics
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jgra..11310104s&link_type=abstract
Journal of Geophysical Research, Volume 113, Issue A10, CiteID A10104
Physics
Plasma Physics
4
Planetary Sciences: Solar System Objects: Moon (1221), Planetary Sciences: Solar System Objects: Dust, Solar Physics, Astrophysics, And Astronomy: Solar Activity Cycle (2162), Space Plasma Physics: Plasma Interactions With Dust And Aerosols (2461)
Scientific paper
The solar vacuum ultraviolet (VUV; < 200 nm) radiation induces photoemission from the surface of the Moon, Mercury, and other airless celestial bodies. This process charges the surface positively and generates a near-surface photoelectron plasma sheath. Solar activity is highly variable in the 70-100 nm range where the photoelectron yield peaks. Available data for high-resolution solar UV spectra and lunar grain photoelectric yield are combined to calculate the variation of photoelectron emission with solar activity. The results show that extreme solar flare conditions can increase photoelectron emission several fold. The consequence of higher photoelectron current is increased surface potential and stronger electric field that is likely to increase the electrostatic mobilization of lunar dust.
Chamberlin Phil
Horanyi Mihaly
Robertson Scott
Sternovsky Zoltan
Wang Xinhua
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