Physics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12r..57t&link_type=abstract
(Active experiments in space; Proceedings of the Topical Meeting of the Interdisciplinary Scientific Commission D /Meeting D3/ o
Physics
2
Earth Orbital Environments, Electron Density (Concentration), Ion Density (Concentration), Particle In Cell Technique, Plasma Sheaths, Space Plasmas, Computerized Simulation, Plasma Turbulence, Spheres, Time Dependence
Scientific paper
The basic physics involving the interaction of a high voltage sphere with a LEO-Plasma was investigated via computer experiments. Two approaches were used: the fluid description and the more general particle pushing method. Both techniques displayed qualitatively similar features. Thus, the initial time-dependent response of the plasma predicted by the fluid model, including the initial current surge and sheath formation, the formation of ion and electron density shells about the sphere with a double layer potential structure, and the subsequent propagation of the density shells away from the sphere. The PIC results also displayed an oscillatory character and slightly different time constants for the growth and decay mechanisms involved.
Ma Zh. T.
Schunk Robert W.
Thiemann Heinz
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