A study of thinner-THGEM, with some applications

TL;DR

This paper investigates the performance of thinner-THGEM detectors with various parameters, demonstrating their effectiveness in high-gain applications, energy resolution, and practical uses like diffraction studies and educational experiments.

Contribution

It introduces a thinner-THGEM design and explores its performance characteristics, including gain, energy resolution, and applications in diffraction and education.

Findings

Achieved gain of around 3×10^3 in Ar/iC4H10 gas mixture.

Obtained gains over 10^4 in Ne mixture at lower voltage.

Energy resolution of 15.9% was measured under specific conditions.

Abstract

THGEMs (THick Gas Electron Multiplier) of varying thickness, hole diameter and hole pitch have been studied. For a thinner-THGEM of thickness 0.2 mm, with hole diameter 0.2 mm, pitch 0.2 mm and narrow (5-10 {\mu}m) rim, the performance of gain versus high voltage with different gas mixtures have been studied using 5.9 keV X-rays. In general, a gain of around 3\times10^3 was obtained with a single board in Ar/iC4H10, and gains higher than 10^4 were obtained in Ne mixture at lower voltage. The dependence of the energy resolution on the drift and induction electric fields was measured and an energy resolution of 15.9% was obtained. A curved thinner-THGEM chamber with one-dimensional readout has been assembled for use in the diffraction studies at the Beijing Synchrotron Radiation Facility (BSRF). A cosmic-ray muon hodoscope based on thinner-THGEM was developed as a teaching experiment for the Graduate University of the Chinese Academy of Sciences (GUCAS).