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A determination of the L dependence of the radial diffusion coefficient for protons in Jupiter's inner magnetosphereIn a previous paper (Thomsen et al., 1977), a technique was proposed for estimating the radial diffusion coefficient (n) in the inner magnetosphere of Jupiter from the observations of the sweeping effect of the inner Jovian satellites on the fluxes of the energetic charged particles. The present paper extends this technique to permit the unique identification of the parameters D sub O and n, where the diffusion coefficient is assumed to be of the form D = D sub O L to the nth. The derived value of D sub O depends directly on assumptions regarding the nature and efficiency of the loss mechanism operating on the particles, while the value of n depends only on the assumed width of the loss region. The extended technique is applied to the University of Iowa Pioneer 11 proton data, leading to values of n of about O and D(6) of about 3 x 10 to the -8th (R sub J)-squared/sec, when satellite sweepup losses are assumed to be the only loss operating on the protons. The small value of n is strong evidence that the radial diffusion is driven by ionospheric winds.
Document ID
19770066969
Document Type
Reprint (Version printed in journal)
Authors
Thomsen, M. F. (Iowa Univ. Iowa City, IA, United States)
Goertz, C. K. (Iowa Univ. Iowa City, IA, United States)
Van Allen, J. A. (Iowa, University Iowa City, Iowa, United States)
Date Acquired
August 9, 2013
Publication Date
September 1, 1977
Publication Information
Publication: Journal of Geophysical Research
Volume: 82
Subject Category
LUNAR AND PLANETARY EXPLORATION
Funding Number(s)
CONTRACT_GRANT: NAS2-6553
CONTRACT_GRANT: NSF ATM-72-01282
Distribution Limits
Public
Copyright
Other