Abstract
The Geant4 electromagnetic (EM) physics sub-packages are a component of LHC experiment simulations. During long shutdown 2 for LHC, these packages are under intensive development and we report progress of EM physics in Geant4 versions 10.5 and 10.6, which includes faster computation, more accurate EM models, and extensions to the validation suite. New approaches are developed to simulate radiation damage for silicon vertex detectors and for configuration of multiple scattering per detector region. Improvements in user interfaces developed for low-energy and the Geant4-DNA project are used also for LHC simulation optimisation.
Highlights
EM physics sub-libraries [1, 2] are an important component of the Geant4 toolkit [3,4,5], which affects both Monte Carlo (MC) simulation accuracy and CPU performance of LHC detector simulations
We report on recent progress in EM model developments and on updates of user interfaces, which are included in the Geant4 versions 10.5 and 10.6
For Geant4 10.6 EM physics tests become a part of the geant4-val tool [17], which allows a significant improvement in the statistics of these tests and in the number of variants of EM calorimeter configurations
Summary
EM physics sub-libraries [1, 2] are an important component of the Geant toolkit [3,4,5], which affects both Monte Carlo (MC) simulation accuracy and CPU performance of LHC detector simulations. We report on recent progress in EM model developments and on updates of user interfaces, which are included in the Geant versions 10.5 and 10.6. In our previous reports [5,6,7,8], earlier Geant versions were described. Combined configurations of Geant4-DNA and standard models were described in Refs. Common validation efforts for high and low-energy use-cases allow improving quality of EM simulation in general
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