New Geant4 model and interface developments for improved space electron transport simulations: First results

A review of Geant4 model and benchmark developments in the framework of an Electron Shielding project sponsored by ESA is presented. It includes extensions of electron ionisation models to lower energies, development of a new standard model of bremsstrahlung and a new angular generator of bremsstrahlung, and new standard models of Compton and Rayleigh scattering. New validation benchmarks have been developed for electron scattering and bremsstrahlung; also a simple benchmark tool has been developed for the GRAS tool. With the new benchmarks Geant4 simulation results can be compared with EGSnrc and Penelope predictions.