Computer Science – Performance
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31...11p&link_type=abstract
Planetary and Space Science, vol. 31, Jan. 1983, p. 11-23.
Computer Science
Performance
2
Cometary Atmospheres, Cosmic Dust, Dust Collectors, Mass Spectroscopy, Space Environment Simulation, Abundance, Atomic Spectra, Decontamination, Space Rendezvous, Substrates, Vacuum Apparatus
Scientific paper
An experimental setup for the simulation of cometary dust collection analysis during a cometary rendezvous mission has been developed. It consists of substrate preparation, dust collection, and secondary ion mass spectroscopy (SIMS), all of which are integrated into one ultrahigh vacuum system. A 20-hr discharge cleaning of the substrates reduced the surface contamination of Na, Al, and K by a factor of 1000 and that of all other contaminants below the detection threshold. The dust environment in a cometary coma is simulated by an electromagnetic dust accelerator which can accelerate every type of dust up to 200 m/s. The SIMS analysis provided information on elemental abundances, the molecular composition, and isotopic ratios of selected elements even at a surface dust coverage of 0.01 to 0.0001. The ion beam permits performance of both bulk analysis and single grain analysis. The latter was successfully accomplished on a 15-micron Mg particle.
Bahr D.
Gruen Eberhard
Lang Dustin
Pailer Norbert
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