Lunar and Martian dust charging on surfaces

Details Lunar and Martian dust charging on surfaces Lunar and Martian dust charging on surfaces

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..649..402s&link_type=abstract

DUSTY PLASMAS IN THE NEW MILLENNIUM: Third Conference on the Physics of Dusty Plasmas. AIP Conference Proceedings, Volume 649,

Physics

1

Dusty Or Complex Plasmas, Plasma Crystals, Mars, Moon

Scientific paper

The contact charging of two planetary analog dust samples are investigated in a simple experiment. Dust particles of lunar (JSC-1) and Martian (JSC-MARS-1) regolith simulants are brought into contact with metals of known work function (Co, Ni, Au, Pt) and the resulting contact charge is measured. The dust charge is typically 105 elementary charges for a ~100 micron dust particle and increases with repeated agitation of the surface. The dust charge scales linearly the work function of the contacting surface. The effective work functions of the planetary analogs are determined by extrapolation to be 5.8 eV and 5.6 eV for the lunar and Martian dust simulants, respectively. Additional measurements are made with oxidized metal surfaces and a glass surface.

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