Considerations on a suction drill for lunar surface drilling and sampling: II. experimental tests in vacuum conditions |
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Authors: | J?rg Fa?wald Norbert I K?mle Mark S Bentley Peter Weiss |
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Institution: | (1) Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria;(2) Departement Ingenierie en Milieux Extremes, COMEX, Centre d’ Essais Hyperbares, Marseille, France;; |
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Abstract: | Drilling devices with the ability to create narrow, but deep, boreholes in a planetary surface are important tools for the
exploration of the structure and properties of planetary surface layers. Therefore, they are usually proposed for planetary
landers for the Moon, Mars, Venus or small planetary bodies. A method based on the use of a cold gas flow for ejecting debris
particles from the borehole has recently been suggested and investigated theoretically (K?mle et al. in Acta Geotech 3:201–214,
2008a). The current paper reports on laboratory experiments designed to validate this method under vacuum or low pressure conditions.
Two different sample materials were used: (1) glass beads in the sub-millimeter size range, and (2) the certified lunar analog
material JSC-1A, a finely crushed basaltic rock. For both materials, the suction process for removing the particles from a
simulated borehole worked well and with a moderate gas consumption. |
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