研究目的

To quantify the effects of Geant4 evolutions on the fraction of backscattered electrons and to assess the capability of simulations using the Goudsmit-Saunderson model and a single Coulomb scattering model based on Mott cross section calculation to reproduce experimental data.

研究成果

The results collected in this paper document validation tests of Geant4-based simulation of electron backscattering with a wide variety of physics modelling options available in the Geant4 toolkit. Significant differences are observed across the set of physics options subject to test, regarding their ability to generate results consistent with the measured fraction of backscattered electrons. No single physics modeling configuration is capable of producing optimal results over the whole energy range covered by the validation test. The detailed validation analysis summarized in this paper provides guidance to help experimental users identify, among the many possible options available in the toolkit, those that most effectively address the requirements specific to their own experimental scenarios.

研究不足

The observable considered in this validation test is sensitive to electron scattering modeling, but its simulated outcome is the result of all the code involved in the simulation, including direct and indirect dependencies, and of the computational environment where the simulation is produced. The results associated with the simulation configurations considered in this paper concern the test of a specific observable, i.e. the fraction of backscattered electrons. Caution should be exercised in extrapolating them to assess the reliability of other simulated observables not subject to validation in this paper, or to other physically different environments.