A Modified and Calibrated Drift-Diffusion-Reaction Model for Time-Domain Analysis of Charging Phenomena in Electron-Beam Irradiated Insulators

摘要

This paper presents an improved version of the previously proposedself-consistent drift-diffusion-reaction model correcting for non-physicalbehavior at longer time scales. To this end a novel boundary condition isemployed that takes into account the effect of tertiary electrons and a fullydynamic trap-assisted generation-recombination mechanism is implemented.Sensitivity of the model with respect to material parameters is investigatedand a calibration procedure is developed that reproduces experimentalyield-energy curves for uncharged insulators. Long-time charging and yieldvariations are analyzed for stationary defocused and focused beams as well asmoving beams dynamically scanning composite insulators.