Dusty plasmas in the vicinity of a large dielectric object in space

Details Dusty plasmas in the vicinity of a large dielectric object in space Dusty plasmas in the vicinity of a large dielectric object in space

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9611291m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, July 1, 1991, p. 11,291-11,305. Lockheed Corp.-supported research.

Physics

4

Cosmic Dust, Dielectrics, Plasma Composition, Space Plasmas, Charge Transfer, Saturn Rings, Spacecraft Charging

Scientific paper

The mutual interaction of plasma and dust is an important feature of the extraterrestrial environment. Modifications of this interaction in the presence of a large material body are investigated. It is found that the magnitudes of both the charge on the body and its potential are reduced by the presence of dust and that a significant reduction of the dust density near the body is due to electrostatic repulsion. Both the reduced magnitude of charge on the body and the repulsion of dust are sensitive to the mean dust velocity; more slowly moving dust is more effectively repelled and also results in a greater magnitude of charge on the body. In addition, some effects depend strongly on the size of the body with respect to the Debye length. The dust density as a function of radial distance from the body approaches its asymptotic value most slowly when the size of the body is of the order of 1-10 Debye lengths.

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