A planar model of the probe electric environment

Details A planar model of the probe electric environment A planar model of the probe electric environment

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981esasp.155...39g&link_type=abstract

In ESA The Comet Halley Probe. Plasma Environ. p 39-45 (SEE N81-34113 24-88)

Mathematics

Halley'S Comet, Impingement, Mathematical Models, Plasma Sheaths, Space Probes, Flyby Missions, Particle Density (Concentration), Secondary Emission, Spacecraft Charging, Spacecraft Shielding

Scientific paper

A computer program was written to investigate the structure and dynamic behavior of the charged particle density distribution for the case of a planar surface emitting ions and electrons at the same rate. Ions and neutral molecules impinging on the surface of the Halley's Comet probe extract secondary electrons and ions which control the electric properties of the shield and of its immediate environment. An ion and an electron layer form in the vicinity of the shield at distances of the order of the ion and electron Debye lengths, respectively. The potential of the surface is positive on average and is a function of the electron mean kinetic energy. A positive potential barrier develops at the location of the ion layer and its height is governed by the sum of the electron and ion mean kinetic energies.

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