Coupled low-energy - ring current plasma diffusion in the Jovian magnetosphere

Details Coupled low-energy - ring current plasma diffusion in the Jovian magnetosphere Coupled low-energy - ring current plasma diffusion in the Jovian magnetosphere

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.2665s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, March 1, 1985, p. 2665-2671. Sponsorship: Natural Sciences and Engine

Physics

13

Io, Jupiter Atmosphere, Planetary Magnetospheres, Plasma Diffusion, Ring Currents, Space Plasmas, Current Density, Diffusion Coefficient, Toroidal Plasmas, Jupiter, Magnetosphere, Currents, Plasma, Diffusion, Rings, Turbulence, Pressure, Gradients, Models, Parameters, Density, Energy, Particles, Flux, Thermal Properties, Calculations

Scientific paper

The outwardly diffusing Iogenic plasma and the simultaneously inwardly diffusing ring current plasma in the Jovian magnetosphere are described using a coupled diffusion model which incorporates the effects of the pressure gradient of the ring current into the cross-L diffusion coefficient. The coupled diffusion coefficient is derived by calculating the total energy available to drive the diffusion process. The condition is imposed that the diffusion coefficient takes on a local minimum value at some point in the region L = 7-8, at which point the gradient of the Io plasma density is specified as ramp value given by Siscoe et al. (1981). The hypothesis that the pressure gradient of the ring current causes the diminution of radial plasma transport is tested, and solution profiles for the Iogenic and ring current plasma densities are obtained which imply that the Io plasma ramp is caused by a high-density, low-energy component of the ring current hitherto unobserved directly.

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