Description
The SABRE South experiment, located at the Stawell Underground Physics Laboratory (SUPL) in Stawell, Victoria, is an ultra-low background dark matter detection experiment designed to test the long-standing annual modulation signal reported by DAMA/LIBRA. The SABRE South detector will be comprised of several subsystems, including an active veto system used for background rejection, containing 32 photo-multiplier tubes (PMTs), as well as an optical calibration system (OCS) that will be used to perform in-situ calibration and response monitoring of the veto PMTs. This project outlines investigation into optical calibration strategies for the SABRE South veto system, with testing and implementation through a purpose-built prototype veto vessel located at Adelaide University while moving towards direct implementation in SABRE South’s OCS.
This project investigates precision-timing strategies with a diffuse optical calibration source to perform in situ-calibration, monitoring, and characterisation of the optical response of all photomultiplier tube channels within the prototype veto system. Optical calibration strategies for these measurements are being developed and tested using the prototype veto vessel at Adelaide University. These studies include development and characterisation of the data acquisition (DAQ) system, as well as timing optimisation through constant fraction discrimination (CFD) to develop and validate calibration procedures prior to their implementation in the SABRE South detector. This work aims to establish a robust calibration framework for characterising timing resolution, optical uniformity, and detector stability, ensuring a well-understood detector response and supporting the low-background requirement for the search for an annual modulation signal from dark matter.
| I am the presenting author | Yes |
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