Statistics – Applications
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7069e..10p&link_type=abstract
Optical System Contamination: Effects, Measurements, and Control 2008. Edited by Straka, Sharon A. Proceedings of the SPIE, Vol
Statistics
Applications
Scientific paper
Dust contamination is a serious problem for equipment and vehicles for space mission applications. Lunar "weathering" has left the lunar soil with a relatively fine texture, a small count median diameter and an unusually large geometrical standard deviation compared to terrestrial dust particle size distributions. Accumulated lunar dust regolith is estimated to reduce solar power system efficiencies by as much as 50 percent. Lunar dust is electrostatically charged, difficult to remove, and appears to get everywhere. Astronaut exposure to lunar dust and its risks to health and operations are also an important design consideration for long-duration lunar missions. We are attempting to design an integrated approach to solving the dust problems associated with its many elements (life support systems, EVA, docking and berthing, surface mobility, in situ resource utilization, and power system components), as opposed to leaving it to each individual element developer. Other potential applications include mitigation of unintentional capture of extraterrestrial bacteria or spores on the surfaces of the equipment. This presentation will present an overview of the lunar regolith particle size and shape distribution properties, hydrophilic and hydrophobic coating self-cleaning approaches and a new approach which incorporates various catalytic mechanisms (stoichiometric, photocatalytic and electrocatalytic) for decontamination.
Leyble Dennis
Pirich Ronald
Weir John
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