The heavy ion analyser PICCA for the comet Halley fly-by with Giotto

Details The heavy ion analyser PICCA for the comet Halley fly-by with Giotto The heavy ion analyser PICCA for the comet Halley fly-by with Giotto

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jphe...20..787k&link_type=abstract

Journal of Physics E - Scientific Instruments (ISSN 0022-3735), vol. 20, pt. 2, June 1987, p. 787-792. Research supported by the

Physics

8

Comet Tails, Giotto Mission, Halley'S Comet, Heavy Ions, Positive Ions, Comet Nuclei, Ion Distribution, Ionized Gases, Low Temperature, Neutral Gases, Space Probes

Scientific paper

The heavy ion analyzer RPA2-PICCA is designed to identify the composition and distribution of thermal positive ions in the coma of the comet Halley. The instrument is an electrostatic analyzer which takes advantage of the large relative flyby velocity and the fact that the ions in the inner coma should have low temperatures and be predominantly singly charged. Thus, the energy/charged measurements can be directly related to the mass distribution of the ions. Mass identification will be provided in the range from 10 to 203 amu (atomic mass units) with a mass resolution of either 0.4 amu or 1 amu, dependent on the ion mass.

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