%0 Journal Article
%T Studies of THGEM-based detector at low-pressure Hydrogen/Deuterium, for AT-TPC applications
%A Marco Cortesi
%A John Yurkon
%A Wolfgang Mittig
%A Daniel Bazin
%A Saul Beceiro-Novo
%A Andreas Stolz
%J Physics
%D 2015
%I arXiv
%R 10.1088/1748-0221/2015/09/P09020
%X 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.
%U http://arxiv.org/abs/1511.05816v1