1. Simulation and background characterisation of the SABRE South experiment: SABRE South Collaboration.
- Author
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Barberio, E., Baroncelli, T., Bignell, L. J., Bolognino, I., Brooks, G., Dastgiri, F., D'Imperio, G., Di Giacinto, A., Duffy, A. R., Froehlich, M., Fu, G., Gerathy, M. S. M., Hill, G. C., Krishnan, S., Lane, G. J., Lawrence, G., Leaver, K. T., Mahmood, I., Mariani, A., and McGee, P.
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SODIUM iodide , *DARK matter , *PHYSICS laboratories , *GOVERNMENT laboratories , *PROOF of concept - Abstract
SABRE (Sodium iodide with Active Background REjection) is a direct detection dark matter experiment based on arrays of radio-pure NaI(Tl) crystals. The experiment aims at achieving an ultra-low background rate and its primary goal is to confirm or refute the results from the DAMA/LIBRA experiment. The SABRE Proof-of-Principle phase was carried out in 2020–2021 at the Gran Sasso National Laboratory (LNGS), in Italy. The next phase consists of two full-scale experiments: SABRE South at the Stawell Underground Physics Laboratory, in Australia, and SABRE North at LNGS. This paper focuses on SABRE South and presents a detailed simulation of the detector, which is used to characterise the background for dark matter searches including DAMA/LIBRA-like modulation. We estimate an overall background of 0.72 cpd/kg/ keV ee in the energy range 1–6 keV ee primarily due to radioactive contamination in the crystals. Given this level of background and considering that the SABRE South has a target mass of 50 kg, we expect to exclude (confirm) DAMA/LIBRA modulation at 4 (5) σ within 2.5 years of data taking. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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