Physics
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250c.333g&link_type=abstract
In ESA, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 3: Posters p 333-336 (SEE N87-26714
Physics
Cosmic Dust, Hypervelocity Impact, Plasma Probes, Satellite-Borne Instruments, Space Environment Simulation, Terminal Ballistics, Carbon, Giotto Mission, Iron, Particle Accelerators, Penetration, Silicates, Spacecraft Shielding
Scientific paper
The Halley's comet environment encountered by the Giotto DIDSY IPM-P experiment (2 impact ionization detectors), 1 (sensor B) covered with a 2.5 micron thick aluminized Mylar film was simulated at a dust accelerator, using iron, silicate, and carbon particles. Silicate particles shot at a plasma drag accelerator were also used. It is shown that at constant speed the impact charge is proportionate to the particle mass. At encounter velocity the charge-to-mass ratio is 700 C/g for iron particles and 3000 C/g for carbon or silicate. Sensor B shows deviations from this law because of the film. For iron projectiles the penetration limit is 0.65 times 10 to the minus 14th power, for silicate 1.3 times 10 to the minus 14th power, and for carbon at least 1.8 times 10 to the minus 14th power g.
Goeller J. R.
Gruen Eberhard
Maas Dustin
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