Abstract
The Micro-Pattern Gaseous Detectors (MPGD) have been widely adopted in nuclear and particle physics experiments, for their fast response and other excellent characteristics. To achieve the required signal strength and detection efficiency, sometimes they are operated at a high voltage range. This often challenges the limit of high voltage stability of the detectors. Discharge in gaseous detectors is a complex process and involves several responsible factors. Regions, where the electric field is abruptly changing to a very high value may sometimes induce discharge. We have done a systematic numerical study on the electric field of various micro-mesh structures in COMSOL . Within the same framework, we have developed a 3-dimensional model of discharge in a parallel plate type geometry and then implemented it in a non-resistive Micromegas geometry. The effect of space charge has been taken into account in the calculation. Besides studying the occurrence and development of spark, the model is also useful to study the effects of tuning the geometrical parameters, the effects of gas impurities and different numbers of primary charges.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
