HR: 0830h
AN: SM51B-0524    [PDF]
TI: Stormtime Particle Energization With AMIE Potentials
AU: * Khazanov, G V
EM: George.Khazanov@msfc.nasa.gov
AF: NASA Marshall Space Flight Center, National Space Science and Technology Center, Huntsville, AL 35899 United States
AU: Liemohn, M W
AF: Space Physics Research Laboratory, University of Michigan, Ann Arbor, MI 48109 United States
AU: Fok, M
AF: Laboratory for Extraterrestrial Physics, Code 692, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Newman, T S
AF: Computer Science Department, The University of Alabama in Huntsville, Huntsville, AL 35899 United States
AU: Ridley, A J
AF: Space Physics Research Laboratory, University of Michigan, Ann Arbor, MI 48109 United States
AB: Simulations were conducted to investigate the influence of rapid electric field fluctuations on electron energization in the inner magnetosphere based on the assimilative mapping of ionospheric electrodynamics (AMIE) technique. Simulations for four different magnetic storms were run, namely those that occurred on May 15, 1997, May 4, 1998, September 25, 1998, and October 19, 1998. Here, we have examined the formation of high energy electrons in the inner magnetosphere during these storm events with our recently-developed relativistic radiation belt transport code. The point of this numerical experiment is to show that a simulation of a real event must have the high time resolution electric field input files in order to produce the seed population for the radiation belts, which are often observed to increase in the days following a magnetic storm. Specifically, a cadence of the global electric field pattern of 5 minutes or less produces inner magnetospheric fluxes that are larger (by up to 5 orders of magnitude) than fluxes produced with a longer cadence. Differences were particularly large relative to simulation results with a 3-hour time cadence, analogous to a Kp-driven electric field model.
DE: 2720 Energetic particles, trapped
DE: 2753 Numerical modeling
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting