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Coupled low-energy - ring current plasma diffusion in the Jovian magnetosphereThe 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.
Document ID
19850044800
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Summers, D.
(Newfoundland, Memorial University St. John's, Canada; California, University, Los Angeles, CA, United States)
Siscoe, G. L.
(California, University Los Angeles, CA, United States)
Date Acquired
August 12, 2013
Publication Date
March 1, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
85A26951
Funding Number(s)
CONTRACT_GRANT: NAGW-333
CONTRACT_GRANT: NAGW-87
CONTRACT_GRANT: NSERC-A-0621
Distribution Limits
Public
Copyright
Other

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