Dust Eruptions by Photophoresis and Solid State Greenhouse Effects

Details Dust Eruptions by Photophoresis and Solid State Greenhouse Effects Dust Eruptions by Photophoresis and Solid State Greenhouse Effects

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006phrvl..96m4301w&link_type=abstract

Physical Review Letters, vol. 96, Issue 13, id. 134301

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13

Heat Flow In Porous Media, Slip Flows And Accommodation, Dust Processes, Atmospheres

Scientific paper

We carried out experiments that show a gas pressure dependent ability of light to eject particles from a dust bed. Dust eruptions also occur upon removal of the light source. This can be attributed to a solid state greenhouse effect and photophoretic forces. This ejection mechanism works at light intensities larger than 6kW/m2 but in extreme cases might work as low as 1kW/m2. It can be applied to sunlit dust on Mars where it aids or triggers dust lift-off from the surface into the atmosphere. It is of importance for dusty bodies at the inner edge of protoplanetary disks where it leads to light induced erosion. The effect also offers a base for technical applications of dust removal in low pressure environments.

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