Radial diffusion and ion partitioning in the Io torus

Details Radial diffusion and ion partitioning in the Io torus Radial diffusion and ion partitioning in the Io torus

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..517c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, June 1986, p. 517-520.

Physics

17

Diffusion Theory, Io, Satellite Atmospheres, Toroidal Plasmas, Atmospheric Models, Oxygen Ions, Partitions, Random Walk, Sulfur, Jupiter, Satellites, Io, Diffusion, Ions, Partitioning, Models, Sulfur, Oxygen, Plasma Torus, Electrons, Impacts, Charged Particles, Voyager 1, Spacecraft Observations, Spectroscopy, Injection, Transport, Calculations

Scientific paper

A model is presented for radial diffusion and charge state partitioning of sulfur and oxygen ions in the Io torus, including effects of electron impact and charge exchange. When applied to Voyager 1 radial profiles of total ion flux tube content, the model shows that the ion residence time in the torus, tau(D), as defined in spectroscopic studies of ion partitioning, is related to the radial diffusion coefficient, D(LL), at L = 7 by tau(D) approximately 8/D(LL)(7). This result appears to bring spectroscopic estimates of the ion residence time (tau/D/ greater than about 60 to 100 days) into reasonable agreement with estimates of D(LL) from magnetospheric diffusion studies, D(LL) equals approximately 10 to the -6th/s.

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