Stormtime particle energization with high temporal resolution AMIE potentials

Details Stormtime particle energization with high temporal resolution AMIE potentials Stormtime particle energization with high temporal resolution AMIE potentials

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgra..10905209k&link_type=abstract

Journal of Geophysical Research, Volume 109, Issue A5, CiteID A05209

Physics

Plasma Physics

7

Space Plasma Physics: Charged Particle Motion And Acceleration, Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Storms And Substorms, Magnetospheric Physics: Energetic Particles, Trapped

Scientific paper

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 15 May 1997, 4 May 1998, 25 September 1998, and 19 October 1998. Here we have examined the formation of high-energy (100-500 keV) 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 min or less produces inner magnetospheric fluxes that are larger (by up to several 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.

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