CIEMAT Publications

Abstract

The use of xenon-doped liquid argon (LAr) is a promising alternative for large-scale LAr-TPCs, since it mitigates the light reduction due to impurities and it also improves the photon-detection uniformity. The present study analyses the impact of using xenon-doped liquid argon in the scintillation light production and propagation in ProtoDUNE Dual-Phase, a 750 ton Dual-Phase LAr-TPC installed at the CERN Neutrino Platform. The effects of the presence of xenon at 5.8 ppm are analysed in this paper, showing an increase of the average scintillation light signal and a suppression of the signal amplitude. A 60% increase of the detection uniformity is measured. The impact on the scintillation time profile is also studied. A model to fit the time profile is proposed and the time constants of the physics processes are obtained. A Monte Carlo simulation based in the model is developed and compared with data.