Kinetic modeling of the Saturn ring-ionosphere plasma environment

Details Kinetic modeling of the Saturn ring-ionosphere plasma environment Kinetic modeling of the Saturn ring-ionosphere plasma environment

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9417287w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Dec. 1, 1989, p. 17287-17298.

Physics

10

Planetary Ionospheres, Planetary Magnetic Fields, Plasma Dynamics, Saturn Atmosphere, Saturn Rings, Atmospheric Composition, Electric Discharges, Magnetic Field Configurations, Planetary Composition

Scientific paper

A time-independent kinetic plasma model was developed on the basis of the Li et al. (1988) semikinetic plasma model and was used to study the interaction of the Saturnian ionosphere and ring plasma. The model includes the gravitational magnetic mirror and centripetal and ambipolar electric forces, and the effect of the mixing of two plasma populations. The results obtained indicate that the density, temperature, and composition of plasma near the rings changing in the direction from the inner C ring to the outer A ring, due to the fact that the predominant source of plasma changes from the ionosphere to the rings. The model results also suggest that the outflow of hydrogen from the ionosphere to the rings may be shut off for field lines passing through the outer B and A ring, due to the ambipolar electric field set up by the warm ring plasma trapped near the ring plane by the centipetal force. In these regions, there will be a net flux of O(+) ions from the rings to the ionosphere.

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