The SABRE South Technical Design Report Executive Summary
Abstract
In this technical design report (TDR) executive summary we describe the SABRE South detector to be built at the Stawell Underground Physics Laboratory (SUPL). The SABRE South detector is designed to test the long-standing DAMA/LIBRA signal of an annually modulating rate consistent with dark matter by using the same target material. Located in the Southern Hemisphere, the detector is uniquely positioned to disentangle modulating seasonal effects. SABRE South uses seven ultra-high purity NaI(Tl) crystals (with a total target mass of either 35 kg or 50 kg), hermetically sealed in copper enclosures that are suspended within a liquid scintillator active veto. High quantum efficiency and low background Hamamatsu R11065 photomultiplier tubes are directly coupled to both ends of the crystal, and enclosed with the crystal in an oxygen free copper enclosure. The active veto system consists of 11.6 kL of linear alkylbenzene (LAB) doped with a mixture of fluorophores and contained in a steel vessel, which is instrumented with at least 18 Hamamatsu R5912 photomultipliers. The active veto tags key radiogenic backgrounds intrinsic to the crystals, such as K, and is expected to suppress the total background by 27% in the 1-6 keV region of interest. In addition to the liquid scintillator veto, a muon veto is positioned above the detector shielding. This muon veto consists of eight EJ-200 scintillator modules, with Hamamatsu R13089 photomultipliers coupled to both ends. With an expected total background of 0.72 cpd/kg/keV, SABRE South can test the DAMA/LIBRA signal with 5 discovery or 3 exclusion after two years of data taking.
Keywords
Cite
@article{arxiv.2411.13889,
title = {The SABRE South Technical Design Report Executive Summary},
author = {E. Barberio and T. Baroncelli and V. U. Bashu and L. J. Bignell and I. Bolognino and G. Brooks and S. S. Chhun and F. Dastgiri and A. Di Giacinto and G. D'Imperio and A. R. Duffy and M. B. Froehlich and T. Fruth and G. Fu and G. C. Hill and R. S. James and K. Janssens and S. Kapoor and G. J. Lane and K. T. Leaver and A. Mariani and P. McGee and L. J. McKie and P. C. McNamara and J. McKenzie and W. J. D. Melbourne and M. Mews and G. Milana and L. J. Milligan and J. Mould and V. Pettinacci and K. J. Rule and F. Scutti and Z. Slavkovská and O. Stanley and A. E. Stuchbery and B. Suerfu and G. N. Taylor and D. Tempra and T. Tunningly and P. Urquijo and C. Vignoli and A. G. Williams and Y. Xing and M. J. Zurowski},
journal= {arXiv preprint arXiv:2411.13889},
year = {2025}
}