Physical modeling of radiation belt response to geomagnetic storm. Part 2: On a 10 hour-10 day time scale

In order to reproduce the Earth's radiation belt response to geomagnetic storms on the 10 hours-10 days time scale we have developed a code, Salammbo 3D, (3D equivalent to two spatial dimensions, radial distance and latitude, and one dimension in energy) which solves the phase space diffusion e...

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Bibliographic Details
Published in:Advances in space research 1997-01, Vol.20 (3), p.381-384
Main Authors: Bourdarie, S, Boscher, D, Beutier, T, Sauvaud, JA, Blanc, M
Format: Article
Language:English
Online Access:Get full text
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Summary:In order to reproduce the Earth's radiation belt response to geomagnetic storms on the 10 hours-10 days time scale we have developed a code, Salammbo 3D, (3D equivalent to two spatial dimensions, radial distance and latitude, and one dimension in energy) which solves the phase space diffusion equation. It is used to understand the dynamic conditions of the electron and proton radiation belt (from L= 1 to 7) after a geomagnetic storm, when distribution functions are averaged over the drift path. With such a model, which allows one to reproduce flux variations that occur over a time scale on the order of half a day, the outer belt electron dynamics can be characterized. Particles in the energy range 100 keV-500 keV are diffuse throughout the belt. Particles with higher energies are ''created'' by acceleration of slower particles near the plasmapause location. The calculated shape of the fluxes in a L versus time grid for MeV electrons are in good agreement with CRRES particle data obtained during a typical event.
ISSN:0273-1177