Surface background rejection technique for liquid argon dark matter detectors using a thin scintillating layer

Abstract

Future large liquid argon direct dark matter detectors can benefit greatly from an efficient surface background rejection technique. To aid the development of these large scale detectors a test stand, Argon-1, has been constructed at Carleton University, Ottawa, Canada, in the noble liquid detector development lab. It aims to test a novel surface background rejection technique using a thin layer of slow scintillating material at the surface of the vessel. Through pulse-shape discrimination of the slow light from the scintillating layer, events from the surface of the detector can be discriminated from liquid argon events. The detector will be implemented with high-granularity SiPMs for light detection which will be used to accurately identify surface events to characterize the proposed technique. An overview of the technique and the status of the experiment are discussed here.

arXiv comment7 Pages, 4 Figures, Pre-Print for submission to JINST for LIDINE 2019 Conference proceedings

References in corpus (5)

• Performance of scintillation materials at cryogenic temperatures
• Design and Construction of the DEAP-3600 Dark Matter Detector
• Scintillation of thin tetraphenyl butadiene films under alpha particle excitation
• Surface background suppression in liquid argon dark matter detectors using a newly discovered time component of tetraphenyl-butadiene scintillation
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Cited by in corpus (2)

• Wavelength shifters for applications in liquid argon detectors
• Development and characterization of a slow wavelength shifting coating for background rejection in liquid argon detectors