Physics
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.7623g&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, May 1, 1991, p. 7623-7639. Lockheed Corp.-supported research.
Physics
9
Artificial Clouds, Digital Simulation, Earth Ionosphere, Plasma Clouds, Three Dimensional Models, Atmospheric Density, Elastic Scattering, Electric Fields, Temperature Effects
Scientific paper
A fully three-dimensional model for an artificial plasma cloud in the ionosphere is developed. Such a cloud could be a result of a deliberate release or contamination about a spacecraft. The numerical solution for a plasma sphere immersed in a plasma with an external electric field is obtained and compared with known analytic solutions. The electrodynamical behavior of Gaussian-like clouds is examined. The neutral cloud simulates an orbital release (U = 8 km/s) with various masses. The effects of the central density of the contaminant neutrals and ions are investigated. The perturbation potential increases with increasing ion and neutral density. The perturbation electric field consists of a dipole field due to the action of the neutral density. The perturbation electric field consists of a dipole field due to the action of the neutral wind and a diffusion field due to the density gradients. The dipole field is mapped along the magnetic field lines while the diffusion is bounded within the density perturbation. With cloud densities of 10 to the 15th/cu m the ion cloud drifts almost with the neutral cloud velocity. The effects of the coupling of the lower E and upper F region are also investigated.
Gatsonis Nikolaos A.
Hastings Daniel E.
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