Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsm43b..09k&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SM43B-09
Physics
2720 Energetic Particles, Trapped, 2740 Magnetospheric Configuration And Dynamics, 2753 Numerical Modeling, 2784 Solar Wind/Magnetosphere Interactions
Scientific paper
We numerically investigate the injection of relativistic electrons into the radiation belts during the 29-31 OCT 2003 (Haloween) geomagnetic storm. Test particle Lorentz trajectories are computed in fields from a Lyon-Feder-Mobarry (LFM) global MHD simulation of the Haloween storm using measured solar wind parameters to study the role of non-adiabatic effects on magnetospheric entry and trapping of 10-20 MeV electrons. A relativistic gamma factor ~20-40 for these ultrarelativistic electrons means that their gyro-radii approach the scale lengths of magnetic field gradients in the outer radiation belts, suggesting that a generalization of Störmer theory to time dependent fields may provide a mechanism for the injection and trapping of relativistic electrons, as has previously been shown for solar energetic ions (Kress et al. Fall AGU 2004).
Hudson Mary K.
Kress Brian T.
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