Studies of THGEM-based detector at low-pressure Hydrogen/Deuterium, for AT-TPC applications

Abstract

We study the performance of single- and double- THick Gas Electron Multiplier (THGEM) detectors in pure Hydrogen and Deuterium at low pressures, in the range of 100-450 Torr. The effect of the pressure on the maximum achievable gain, ion-back flow and long-term gain stability are investigated for single and double cascade detectors. In particular, it was found that maximum achievable gains above 10^4, from single-photoelectrons avalanche, can be achieved for pressures of 200 Torr and above; for lower pressure the gains are limited by avalanche-induced secondary effects to a values of around 103. The results of this work are relevant in the field of avalanche mechanism in low-pressure, low-mass noble gases, in particular for applications of THGEM end-cap readout for active-target Time Projection Chambers (TPC) in the field of nuclear physics and nuclear astrophysics.

Published in JINST; 9 pages, 7 figures

References in corpus (1)

• Operation of a THGEM-based detector in low-pressure Helium

Cited by in corpus (4)

• Measurements of charging-up processes in THGEM-based particle detectors
• Simulation of gain stability of THGEM gas-avalanche particle detectors
• Gain stabilization in Micro Pattern Gaseous Detectors: methodology and results
• The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications