Speaker
Description
Micro-pattern gaseous detectors (MPGDs) have demonstrated outstanding performance in X-ray and gamma-ray detection; however, further improvements in gain stability, signal formation, and spatial resolution are still strongly connected to the microscopic transport properties of charge carriers in the gas. In this contribution, we present recent developments on nano-patterned GEM (nano-GEM) detectors, focusing on the role of ionic-cluster formation and transport in gas-filled radiation detectors.
The nano-GEM concept exploits nano-structured dielectric and electrode geometries to modify local electric fields and charge transport mechanisms. By combining experimental measurements with detailed simulations using Garfield++ and Magboltz, we investigate how ion clustering phenomena affect signal formation, ion mobility, and space-charge effects under X-ray irradiation. Particular attention is devoted to the impact of nano-scale patterning on detector response, gain uniformity, and temporal characteristics.
Our results indicate that nano-structured GEM architectures provide an effective pathway to control ion transport and mitigate ion-related performance limitations, opening new perspectives for high-rate, high-stability X-ray and gamma-ray detection systems. These findings are directly relevant for next-generation radiation detectors and imaging applications within the framework of the ENRICH COST Action.