Comet simulation experiments as a prelude to the CRAF and Rosetta missions

Details Comet simulation experiments as a prelude to the CRAF and Rosetta missions Comet simulation experiments as a prelude to the CRAF and Rosetta missions

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..289b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Feb. 1991, p. 289-291. Research supported by DFG.

Physics

5

Chemical Composition, Comet Nuclei, Cometary Atmospheres, Ice, Space Simulators, Comet Rendezvous Asteroid Flyby Mission, Ground Tests, Interplanetary Dust, Temperature Dependence, Comets, Simulations, Experiments, Laboratory Studies, Craf Mission, Rosetta Mission, Mission Planning, Samples, Composition, Water Ice, Models, Comet Nuclei, Parameters

Scientific paper

Recent laboratory experiments on the structure and evolution of comet nuclei are surveyed, with an emphasis on their importance as an aid in selecting the location and technique of sample acquisition for the planned comet-encounter missions CRAF and Rosetta. The discoveries made during the Giotto and Vega encounters with Comet Halley are summarized; small-scale studies of gas entrapment in and release from water ice and efforts at numerical modeling of these processes are described; and the need for large-scale simulations such as the KOSI project at DLR (Gruen et al., 1987) is indicated. In KOSI, 20-cm-diameter 15-cm-thick specimens made up of ice, mineral dust, and frozen CO2 are irradiated in a large space simulation chamber. A device making it possible to prepare more realistic 'cometary' samples for KOSI is being constructed at Tel Aviv University.

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