Simulation of GEM detector using Geant4 and Garfield++

The CERN gas team (EP-DT-FS) has defined several strategies to reduce the greenhouse gas emissions coming from particle detectors. Different set-ups have been implemented to study both gas systems and gaseous detector performance. In this scope, Monte Carlo simulation of the detector with different gas compositions is useful. In this project, Geant4 is used to calculate the properties of the primary ionization electrons that are produced by photons of the $\prescript{55}{} Fe$ source. Garfield++ computes a passage of the electron avalanche through the gas. An analysis of simulation results allows to study GEM performance under different conditions and details of physical processes that are present in the experimental set-up.