On the equatorial confinement of thermal plasma generated in the vicinity of the rings of Saturn

Details On the equatorial confinement of thermal plasma generated in the vicinity of the rings of Saturn On the equatorial confinement of thermal plasma generated in the vicinity of the rings of Saturn

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89..395i&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Jan. 1, 1984, p. 395-398.

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15

Saturn Atmosphere, Saturn Rings, Space Plasmas, Thermal Plasmas, Atmospheric Ionization, Confinement, Magnetic Mirrors, Meteoroids, Planetary Ionospheres, Saturn, Rings, Equatorial Regions, Thermal Properties, Plasmas, Source, Meteoroids, Impacts, Ionosphere, Magnetic Properties, Charged Particles, Flow, Magnetic Moments, Temperature, Ions, Formation, Ionization, Vaporization, Boundaries, B Ring, C Ring, Models

Scientific paper

Consideration of the force balance of the ring plasma generated by meteoroid impact in the rotating ionosphere of Saturn is extended to include the magnetic mirroring effect. It is found that there are modifications to the so-called siphon flow limit derived for charged particles with zero magnetic moment if the ionospheric plasma has a thermal temperature exceeding a few electron volts. The nature of the force balance is such that, instead of a sharp division between complete loss and complete reabsorption, a transition zone of partial loss appears. If part of the ions near the rings are produced by ionization of the neutral atmosphere in the vicinity of the ring system (also generated by meteoroid impact vaporization), another theoretical limit dividing the upward flow from the equatorially confined motion is located near the observed boundary between the B ring and the C ring. This new limit is very sharp, as required to explain the B-C ring boundary, which has not yet been explained by gravitational theory.

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