Photomultiplier Requirements and Pre-Calibration for the SABRE South Liquid Scintillator Veto

Abstract

We present a study of the oil-proof base Hamamatsu R5912 photomultiplier tubes that will be used in the SABRE South linear-alkylbenzene liquid scintillator veto. SABRE South is a dark matter direct detection experiment at the Stawell Underground Physics Laboratory, aiming to test the DAMA/LIBRA dark matter annual modulation signal. We discuss the requirements of the liquid scintillator system and its photomultipliers, outline the methods and analysis used for the characterisation measurements, and results from initial tests. We discuss the impact of these measurements on the performance of the active veto system and explore analysis methods to allow for low threshold operation. Finally, we include results from a small scale liquid scintillator detector prototype used to assess the future performance of pulse shape discrimination in the liquid scintillator veto, and how well accommodated it is by the R5912 PMTs.

28 pages, 23 figures

References in corpus (11)

• The RooFit toolkit for data modeling
• SNEWS 2.0: A Next-Generation SuperNova Early Warning System for Multi-messenger Astronomy
• First direct detection constraints on Planck-scale mass dark matter with multiple-scatter signatures using the DEAP-3600 detector
• Characterization of water-based liquid scintillator for Cherenkov and scintillation separation
• Development, characterisation, and deployment of the SNO+ liquid scintillator
• Distillation and stripping pilot plants for the JUNO neutrino detector: design, operations and reliability
• zfit: scalable pythonic fitting
• Improving ANAIS-112 sensitivity to DAMA/LIBRA signal with machine learning techniques
• Simulation and background characterisation of the SABRE South experiment
• The SABRE South Technical Design Report Executive Summary
• Study of neutron production for 360 GeV cosmic muons