Speaker
Description
Photomultiplier Tubes (PMTs) are central to the SABRE South experiment’s
ability to detect rare, low-energy events, such as potential dark matter interac-
tions in ultra-pure NaI(Tl) crystals. To correctly interpret what the detector
sees, we need simulations that faithfully reproduce how our PMTs respond to
real signals. This work presents the comparison of the simulated PMT wave-
forms from our custom simulation framework with actual SABRE South PMT
data.
Key properties such as gain, dark rate, timing response, and afterpulsing are
studied in PMT tests to build a clear picture of how the PMTs behave under real
experimental conditions. Alongside this, we develop and refine simulated PMT
waveforms that aim to capture the key physical and electronic effects shaping
the signal. By comparing these simulations directly with data, discrepancies are
identified and used to refine the simulation framework. This iterative process
helps to improve the accuracy of the detector response simulation, which is cru-
cial for reliable event reconstruction and background rejection.
The major output from this work will be a realistic PMT response simula-
tion framework tailored to SABRE South, built on detailed characterisation of
PMT performance from calibration and background runs. Our goal is to bridge
the gap between simulation and data, so we can confidently interpret the signals
SABRE South observes
