Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...187..693g&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 187, no. 1-2, Nov. 1987, p. 693-698.
Astronomy and Astrophysics
Astrophysics
7
Calibrating, Flyby Missions, Interplanetary Dust, Spacecraft Instruments, Detectors, Gas Ionization, Impact
Scientific paper
Results from calibration tests with the Dust Impact Detection System-Impact Plasma and Momentum Detector on board Giotto are applied to the SP-1 and SP-2 dust detectors flown on the two Vega Halley probes. It is found that at constant speeds a linear dependency exists between the impact charge and the particle mass. At an encounter speed of 78 km/sec (Vega) the charge yields for ion, carbon, and silicate particles are about twice as high as at 69 km/sec (Giotto). For particles with a density of 1 g/cu cm, the penetration limits of the SP-1 films were 7.0 x 10 to the -16th g and 1.4 x 10 to the -14th g for Vega 1 and Vega 2 respectively.
Goeller J. R.
Gruen Eberhard
Maas Dustin
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