A 3-DIMENSIONAL ANALYSIS OF THE ELECTRON-RADIATION BELT BY THE SALAMMBO CODE

Using diffusion theory, the first results for a phase space three-dime nsional model of the electron radiation belt are presented. The model is based on the numerical solution of a diffusion equation which takes into account the deceleration of electrons by free and bounded thermo spheric and ionospheric electrons, pitch angle diffusion by Coulomb an d wave-particle interactions and radial diffusion by magnetic and elec tric field perturbations. Sources of two types are included. Alone, th e cosmic ray albedo neutron decay (GRAND) internal source gives result s much lower than measured values, though with the addition of an exte rnal source, the orders of magnitude for the fluxes are reasonable, su ggesting that the belt is created and maintained by the injections occ uring during storms and substorms.