Long-term temporal stability of the DarkSide-50 dark matter detector

Abstract

The stability of a dark matter detector on the timescale of a few years is a key requirement due to the large exposure needed to achieve a competitive sensitivity. It is especially crucial to enable the detector to potentially detect any annual event rate modulation, an expected dark matter signature. In this work, we present the performance history of the DarkSide-50 dual-phase argon time projection chamber over its almost three-year low-radioactivity argon run. In particular, we focus on the electroluminescence signal that enables sensitivity to sub-keV energy depositions. The stability of the electroluminescence yield is found to be better than 0.5%. Finally, we show the temporal evolution of the observed event rate around the sub-keV region being consistent to the background prediction.

13 pages, 5 figures

References in corpus (18)

• Results from a search for dark matter in the complete LUX exposure
• First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
• First Dark Matter Search with Nuclear Recoils from the XENONnT Experiment
• First Results from the DarkSide-50 Dark Matter Experiment at Laboratori Nazionali del Gran Sasso
• Annual modulation results from three-year exposure of ANAIS-112
• Search for dark matter particle interactions with electron final states with DarkSide-50
• Search for Electronic Recoil Event Rate Modulation with 4 Years of XENON100 Data
• Strong constraints from COSINE-100 on the DAMA dark matter results using the same sodium iodide target
• Three-year annual modulation search with COSINE-100
• Simulation of argon response and light detection in the DarkSide-50 dual phase TPC
• Calibration of the liquid argon ionization response to low energy electronic and nuclear recoils with DarkSide-50
• An induced annual modulation signature in COSINE-100 data by DAMA/LIBRA's analysis method
• First Large Scale Production of Low Radioactivity Argon From Underground Sources
• The Electronics, Trigger and Data Acquisition System for the Liquid Argon Time Projection Chamber of the DarkSide-50 Search for Dark Matter
• First Commissioning of a Cryogenic Distillation Column for Low Radioactivity Underground Argon
• Effect of Low Electric Fields on Alpha Scintillation Light Yield in Liquid Argon
• Direct dark matter searches with the full data set of XMASS-I
• Search for dark matter annual modulation with DarkSide-50

Cited by in corpus (3)

• DarkSide-20k sensitivity to light dark matter particles
• Benchmarking the design of the cryogenics system for the underground argon in DarkSide-20k
• Search for dark matter annual modulation with DarkSide-50