Signal Formation in THGEM-like Detectors

TL;DR

This paper uses numerical simulations to analyze signal formation in THGEM-like gaseous detectors, validating the simulation framework against experimental data and providing insights into their complex dynamical processes.

Contribution

It introduces a validated simulation toolkit for modeling signal formation in THGEM-based detectors, enhancing understanding of their internal charge dynamics.

Findings

Good agreement between simulated and measured signals across different pre-amplifiers

Simulation framework effectively captures complex detector signal dynamics

Insights gained into the influence of gas mixtures and irradiation types on signal shapes

Abstract

Numerical simulations were used to study signal formation in a Thick Gaseous Electron Multiplier (THGEM) and in THGEM -based Thick-WELL (THWELL) and Resistive-Plate WELL (RPWELL) detectors. The signal shapes were simulated in mixtures of Argon and Neon with $5\%$ Methane under irradiation with soft x-rays and muons. Anode-induced raw signals were convoluted with the response functions of charge-sensitive and current-sensitive pre-amplifiers. The simulation toolkit was validated by the good agreement reached between the simulated and measured response, with different pre-amplifiers. It indicates that our simulations framework provides valid insight into the inherent complex dynamical processes of the various detectors.