p/${\pi^+}$ response of single layer THGEM detector in Ar/3%iC$_4$H$_{10}$

TL;DR

This study evaluates the response of a single-layer THGEM detector to protons and pions in a test beam, demonstrating high detection efficiency and consistency with simulations, and explores its potential for use in calorimeters for future colliders.

Contribution

The paper provides experimental data on THGEM detector efficiency for p and π+ at specific energies and compares results with Geant4 simulations, indicating its feasibility for calorimeter applications.

Findings

Detection efficiency for protons ranges from 93% to 99%.

Detection efficiency for π+ ranges from 82% to 88%.

Experimental results align well with Geant4 simulations.

Abstract

In this work, we study the response of single layer Thick GEM (THGEM) detector to p/${\pi^+}$ at E3 line of Beijing Test Beam Facility. In our experiment, the drift gap of THGEM Detector is 4mm, and the working gas is Ar/3% iso. Result shows at the momentum 500MeV/c to 1000MeV/c, detection efficiency for p is from 93% to 99% in a relatively lower gain($\sim$2000), while the detection efficiency for ${\pi^+}$ is slightly lower than that for p, which is from 82% to 88%. Meanwhile, simple Geant4 simulations have been done, and results of beam test are almost consistent with it. We preliminarily study the feasibility of THGEM detectors as sampling elements for Digital Hadronic Calorimeter(DHCAL), which may provide related reference for THGEM possibly applied in Circular Electron Positron Collider(CEPC) HCAL.