An impact plasma monitor for cometary missions

Details An impact plasma monitor for cometary missions An impact plasma monitor for cometary missions

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984giot.rept...87g&link_type=abstract

In ESA The Giotto Spacecraft Impact-Induced Plasma Environ. p 87-88 (SEE N85-23905 14-18)

Computer Science

Giotto Mission, Halley'S Comet, Plasma Diagnostics, Plasma Sheaths, Aerospace Environments, Electrical Measurement, Environment Effects, Secondary Emission

Scientific paper

A device to detect the emission of plasma associated with high velocity impacts of molecules (70 km/sec), a source of interference for the experiments which study the neutral and ionized gas environment of Comet Halley, was developed. The impact plasma monitor will detect this effect on-board Giotto, VEGA-1 and VEGA-2 by measuring the saturation current of secondary electrons extracted from the surface of a probe exposed to the molecular bombardment. It is expected that these in-situ observations will complement the information obtained from theory and laboratory investigations and help to characterize the immediate vicinity of the spacecraft during their flyby through the cometary coma.

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