Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2B080

Erosion by Photophoresis and Natural Knudsen Compressors in Microgravity

De Beule, Caroline (University of Duisburg-Essen)
Kelling, Thorben (University of Duisburg-Essen)
Teiser, Jens (University of Duisburg-Essen)
Wurm, Gerhard (University of Duisburg-Essen)
Jankowski, Tim (University of Duisburg-Essen)

Experiments have shown that dust beds eject small, micron sized particles under illumination at mbar pressure. This is cause by a solid-state greenhouse effect and photophoresis within the upper layers of the illuminated dust bed. Low gravity experiments showed that this effect strongly depends on graviy, which is in agreement with a developed model. In addition to experiments on parabolic flights, it was possible to get data in drop tower experiments, where light induced erosion is even more efficient.

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