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. The measured values of the above mentioned properties of
the PMTs are implemented in the simulations and hence the simulated PMT
model is developed to mimic an actual PMT response. 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 crucial for reliable event recon-
struction 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.
| I am the presenting author | Yes |
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