Performance of the impact plasma and momentum detector (DIDSY-IPM) before closest approach to comet Halley

Details Performance of the impact plasma and momentum detector (DIDSY-IPM) before closest approach to comet Halley Performance of the impact plasma and momentum detector (DIDSY-IPM) before closest approach to comet Halley

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ehac....2..191l&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 2: Dust and Nucleus p 191-193 (SEE N

Computer Science

Performance

3

Cosmic Dust, Giotto Mission, Plasma Probes, Satellite-Borne Instruments, Spacecraft Performance, Spacecraft Shielding, Hypervelocity Impact, Penetration, Terminal Ballistics

Scientific paper

The Giotto impact plasma and momentum sensor (DIDSY-IPM) was designed to measure the dust flux, mass distribution, and the density of cometary particles in Halley's coma. It was protected by a plastic foil cover, to be retracted before the Halley encounter. The IPM data from Halley encounter in comparison with dust fluxes, derived from the PIA experiment and in combination with the results from laboratory experiments, suggest that the protective cover of the IPM-sensor was not released properly before closest approach. This implies that only the dust flux of particles with masses larger than the penetration limits for 2 or 3 of the cover foils (m greater than or = 3 times 10 to the minums 10th power and minus 9th power g, respectively) can be determined. There is evidence that the IPM protective cover was released shortly before closest approach.

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