HR: 0800h
AN: SA21A-0285    [Abstracts]
TI: Modeled Solar Energetic Particle Trapping in the Earth's Radiation Belts During Geomagnetic Storms and Comparison With Observed Energy Spectra
AU: * Kress, B T
EM: bkress@dartmouth.edu
AF: Dartmouth College, 6127 Wilder Laboratory, Hanover, NH 037553528 United States
AU: Hudson, M K
EM: Mary.K.Hudson@Dartmouth.EDU
AF: Dartmouth College, 6127 Wilder Laboratory, Hanover, NH 037553528 United States
AU: Mazur, J E
EM: joe.mazur@aero.org
AF: The Aerospace Corporation, 15049 Conference Center Drive, CH3/210, Chantilly, VA 20151 United States
AB: Solar energetic particles (SEPs) may be promptly trapped in the Earth's radiation belts during geomagnetic storms due to shock related compressions in the geomagnetic cutoff (Kress et al. 2004; 2005). As a test of this non-adiabatic mechanism for populating energetic ion belts, SAMPEX energy spectra from newly formed belts between L=2 and L=3 are compared with numerically modeled magnetospheric SEP fluxes. Beginning with an isotropic energetic particle distribution with energy spectra measured on open field lines mapping directly to the solar wind, the formation of new belts is modeled by following test particle Lorentz trajectories in time dependent fields obtained from the Lyon-Feder-Mobarry (LFM) global MHD magnetospheric simulation code.
DE: 2720 Energetic particles: trapped
DE: 2740 Magnetospheric configuration and dynamics
DE: 2753 Numerical modeling
DE: 2774 Radiation belts
DE: 2784 Solar wind/magnetosphere interactions
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005