Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm11a1586r&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM11A-1586
Physics
2720 Energetic Particles: Trapped, 2753 Numerical Modeling, 2774 Radiation Belts, 2788 Magnetic Storms And Substorms (7954)
Scientific paper
A combination of MHD simulations driven by the solar wind and interplanetary magnetic field (IMF) upstream of the magnetosphere and particle tracing calculations in the time dependent electric and magnetic fields from the MHD simulation showed the trapping of solar energetic particles (SEPs) in the inner magnetosphere within geosynchronous orbit. The differential flux of the particles in the inner magnetosphere was computed by using measured upstream differential fluxes to normalize the contribution of the test particles. The calculation results have shown reasonably good agreement with observations in the inner magnetosphere. Also the results indicate that at times the trapped particle population is dominated by particles that were trapped for a short time (less than an hour). Longer term particle trapping and the loss of these trapped particles is correlated with changes in the solar wind dynamic pressure, and the IMF.
Ashour-Abdalla Maha
El-Alaoui Mostafa
Richard Robert L.
Walker Ray J.
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