A determination of the L dependence of the radial diffusion coefficient for protons in Jupiter's inner magnetosphere

Details A determination of the L dependence of the radial diffusion coefficient for protons in Jupiter's inner magnetosphere A determination of the L dependence of the radial diffusion coefficient for protons in Jupiter's inner magnetosphere

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.3655t&link_type=abstract

Journal of Geophysical Research, vol. 82, Sept. 1, 1977, p. 3655-3658.

Physics

5

Diffusion Coefficient, Inductance, Jupiter Atmosphere, Particle Diffusion, Planetary Magnetospheres, Protons, Trapped Particles, Europa, Io, Pioneer 11 Space Probe

Scientific paper

In 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 DO and n, where the diffusion coefficient is assumed to be of the form D = DO L to the nth. The derived value of DO 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 (RJ)-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.

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