Impact of the Detector Definition on the Reverse Monte Carlo Calculation Results

Most of the TID, Total Ionizing Dose, calculations for electronic devices based on Reverse Monte Carlo methods consider a point as the detector. This assumption is made whereas the area sensitive to TID is a volume. However, the shape and size of this volume is difficult to estimate. A parametric study using FASTRAD® has been performed to compare TID results obtained using different detector shapes and sizes, to values computed using point detectors. Multiple geometrical models from the simplest one to the most realistic one allowed to get a large spectrum of data and perform a thorough analysis. An equivalent study was performed for external materials and its results are also shown. Recommendations on detector choice are given at the end of this paper.