Experimental study of THGEM detector with mini-rim

TL;DR

This study investigates the gas gain and energy resolution of single and double THGEM detectors with mini-rims, demonstrating high gains and variable energy resolutions in noble gas mixtures at atmospheric pressure.

Contribution

It provides experimental data on the performance of mini-rim THGEM detectors, highlighting their potential for high gain applications with specific gas mixtures.

Findings

Maximum gain of 5×10^3 for single and 2×10^5 for double THGEMs.

Energy resolution ranged from 18% to 28% for 5.9 keV X-rays.

Effective operation in noble gases with small additive content.

Abstract

The gas gain and energy resolution of single and double THGEM detectors (5{\times}5cm2 effective area) with mini-rims (rim is less than 10{\mu}m) were studied. The maximum gain can reach 5{\times}103 and 2{\times}105 for single and double THGEM respectively, while the energy resolution of 5.9 keV X-ray varied from 18% to 28% for both single and double THGEM detectors of different hole sizes and thicknesses.All the experiments were investigated in mixture of noble gases(argon,neon) and small content of other gases(iso-butane,methane) at atmospheric pressure.