Speaker
Description
GEM has become a widely used technology for high-rate particle physics experiments. Radiation hardness, ageing resistance and discharge stability are the main criteria for long-term operation of such detectors. In particular, discharge is a serious issue as it may cause irreversible damages to the detector and readout electronics. The charge density inside the amplification region is the limiting factor of detector stability against discharges. Also, the suppression of ion feedback is very crucial for their applications in TPC which again increases the discharge probability. So, studying charge sharing and charge density in different layers of multi-GEM structures to optimize geometric and electromagnetic configurations for its stable and long term operation, is of particular interest. In this work, we will present the effect of different electric field configurations and gas mixtures on charge density in GEM holes for single, double and triple GEMS using Garfield simulation framework.
