Magnetosphere Electron Radial Transport with Accounting Synchrotron Radiation Losses

A spatial 3-D distribution of the high energy component of the electron radiation belt obtained by the numerical solution of the diffusion equation taking into account both Coulomb interaction losses and synchrotronic radiation (SR) ones is presented. For boundary conditions, high energy 3 - 16 MeV electron fluxes observed at geosynchronous orb by GOES-7 were used. The comparison of electron distributions with and without SR losses shows that the losses of several MeV electrons substantially influence energy distributions of ornni and unidirectional fluxes at L<3. From the standpoint of steady state electron radial transport, the problem of multi-MeV electron origin for the inner zone remains unresolved, and may entail internal magnetospheric nonadiabatic electron acceleration, or, that is more probable, the results of impulsive unsteady cross-L transport.