The SABRE (Sodium iodide with Active Background REjection) experiment aims to detect an
annual rate modulation from dark matter interactions in ultra-high purity NaI(Tl) crystals in order
to provide a model independent test of the signal observed by DAMA/LIBRA. It is made up of
two separate detectors; SABRE South located at the Stawell Underground Physics Laboratory
(SUPL), in regional Victoria, Australia, and SABRE North at the Laboratori Nazionali del Gran
Sasso (LNGS). SABRE South is designed to disentangle seasonal or site-related effects from the
dark matter-like modulated signal by using an active veto and muon detection system. Ultra-high
purity NaI(Tl) crystals are immersed in a linear alkyl benzene (LAB) based liquid scintillator veto,
further surrounded by passive steel and polyethylene shielding and a plastic scintillator muon veto.
Significant work has been undertaken to understand and mitigate the background processes that
take into account radiation from detector materials, from both intrinsic and cosmogenic activated
processes, and to understand the performance of both the crystal and veto systems. SUPL is a
newly built facility located 1024munderground ( 2900mwater equivalent) within the Stawell Gold
Mine and its construction was completed in mid-2022. It will house rare event physics searches,
including the SABRE dark matter experiment, as well as measurement facilities to support low
background physics experiments and applications such as radiobiology and quantum computing.
The SABRE South commissioning is expected to occur this year. This proceeding will report on
the design of SUPL and the construction and commissioning of SABRE South.