# A numerical study on the discharges in Micromegas

## TL;DR

This paper presents a numerical investigation of discharge phenomena in Micromegas detectors using a 3D COMSOL model, analyzing how geometrical and operational parameters influence high-voltage stability.

## Contribution

It introduces a detailed 3D numerical model to study discharges in Micromegas, considering space charge effects and various detector parameters.

## Key findings

- Discharges are influenced by geometrical structures and gas impurities.
- The model predicts discharge development under different operational conditions.
- Space charge effects significantly impact discharge behavior.

## 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 detector. Discharge in gaseous detectors is a complex process and involves several responsible factors. The microscopic geometrical structures of the MPGDs may itself sometimes induce discharges. In this study, we are numerically investigating the discharge phenomena in non-resistive Micromegas. Within the COMSOL framework, a 3-dimensional model is developed to observe the occurrence and the development of discharge in Micromegas. The effect of space charge has been taken into account in the calculation. The model allows to vary the geometrical parameters of the detector as well as to study the effects of gas impurities and a different number of primary charges.