Comparative study on charging-up of single, double and triple Gas Electron Multipliers (GEM)

TL;DR

This study investigates the charging-up effects in single, double, and triple Gas Electron Multipliers (GEMs), analyzing how dielectric polarization and charge accumulation influence gain under various conditions.

Contribution

It provides a comparative analysis of charging-up phenomena across different GEM configurations, expanding understanding of their impact on detector performance.

Findings

Gain increases due to dielectric polarization.

Gain decreases from charge accumulation.

Differences observed between single, double, and triple GEMs.

Abstract

In this paper, a detailed investigation has been carried out to understand the physics behind GEM charging-up and its effects on gain. Experiments have been performed on both double and triple GEM with the help of 55Fe X-ray source and a comparative study of these configurations along with the single GEM results observed in our previous work has been reported. The increase in gain due to polarization of GEM foil dielectric and reduction in gain due to charge accumulation on dielectric are studied for various field configurations and different radiation intensities.