Empirical model of proton fluxes in the equatorial inner magnetosphere: 2. Properties and applications

Details Empirical model of proton fluxes in the equatorial inner magnetosphere: 2. Properties and applications Empirical model of proton fluxes in the equatorial inner magnetosphere: 2. Properties and applications

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1165m&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 108, Issue A5, pp. SMP 1-1, CiteID 1165, DOI 10.1029/2002JA009581

Physics

6

Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Ring Current, Magnetospheric Physics: Current Systems (2409), Magnetospheric Physics: Plasma Convection

Scientific paper

The most probable magnetospheric condition during solar minimum is investigated by using the empirical model of the equatorial proton fluxes presented by Milillo et al. [2001]. The model consists of several segments that reproduce the effects of different physical processes. Those segments describing particle injection and diffusion in the equatorial magnetosphere are considered. The model provides an overall picture of the magnetosphere plasma distributions, thus allowing estimates of the major physical parameters. From this statistical distribution we reconstruct the pattern of the electric field equipotential lines on the equatorial plane. We compute drift paths of test particles at different initial energies and positions, and we focus on both open and closed trajectories and examine through energy-time spectrograms typical features, like dawn-dusk asymmetries of particle transport or flux depletions at specific energies (ion spectral gaps). Some selected parameters of the model are properly varied in order to investigate its possible capability to reproduce different magnetospheric conditions.

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