Microgravity Experiment on Low-Velocity Impacts in Dust

Details Microgravity Experiment on Low-Velocity Impacts in Dust Microgravity Experiment on Low-Velocity Impacts in Dust

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.1817c&link_type=abstract

American Astronomical Society, DPS meeting #28, #18.17; Bulletin of the American Astronomical Society, Vol. 28, p.1127

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The Collisions Into Dust Experiment (COLLIDE) is under construction for flight in a Space Shuttle Get Away Special Cannister. The experiment will extend our laboratory database on collisions into sand to the low energy regime appropriate in planetary ring collisions. Low velocity collisions between planetary ring particles are crucial in determining the dynamics of planetary rings. They also help determine the characteristics of dust rings. Dust is the only observable component of some planetary rings, and the short lifetime of dust particles indicates the presence of longer-lived parent bodies. Collisions between these bodies plays a major role in determining the characteristics of the dust ring. Such low energy collisions may have also played an important role in the early stages of planet formation. Because the collisions occur at mm/s up to perhaps m/s velocities, the ejecta from such collisions cannot be studied in a 1 g gravity environment. Ground-based experiments have examined the velocity range down to about 5 meters per second. COLLIDE will extend this dataset down to collision speeds of the order of 1 cm/s. The experiment will conduct six impacts into simulated lunar regolith at various impact velocities and regolith depths. We will use video to study the evolution of the crater, ejecta launch angles, and ejecta velocity. We will report on the design and construction of COLLIDE and applications of the expected data to studies of planetary dust rings.

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