LONG-TERM DYNAMIC RADIATION BELT MODEL FOR LOW-ENERGY PROTONS

A new simple model for equatorialy mirroring protons, based on classic al radial diffusion, is used here to understand the global long term d ynamics of the ring current ion population. The convection access for low energy particles coming from the plasmasheet is used as a source p opulation. Then magnetospheric acceleration processes are reproduced b y using a Kp dependent radial diffusion coefficient. Comparing the res ults with CRRES satellite energetic ion measurements from the fifteen months of the total mission yields very good quantitative agreement fo r similar to 80 keV ring-current protons and good qualitative agreemen t with similar to 300 keV ions.