Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998newar..42..237w&link_type=abstract
New Astronomy Reviews, Volume 42, Issue 3-4, p. 237-244.
Astronomy and Astrophysics
Astronomy
3
Scientific paper
We discuss new technologies which will be useful in capturing, recovering, and analyzing hypervelocity extraterrestrial grains using aerogel collectors. Two of the techniques that we will discuss also have application to existing and approved experiments, such as STARDUST, a US cometary sample return mission using aerogel collectors. We plan to explore experimentally, in the near future, the viability of a novel calorimetric aerogel, which would both greatly facilitate the finding of stopping hypervelocity grains, and would give a measure of their velocities, thus distinguishing extraterrestrial from anthropogenic grains before extraction and analysis. As one example, this would enable deployment of an interstellar grain collector in low earth orbit. We plan to explore the feasibility of extracting small grains using polysilicon microtweezers. We are refining our automated scanning techniques for application to scanning aerogel collectors. Finally, we are investigating the apparent intact capture of grains at 19-21 km s-1 in aerogel collectors.
Keller Ch.
Phillips Marcia
Westphal Andrew J.
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