Speaker
Description
The DArTinArDM detector, designed to measure the residual 39Ar activity in underground argon (UAr) in a timely manner, has started data taking at the Canfranc Underground Lab. It is a key facility for the DarkSide-20k liquid argon dark matter experiment, currently under construction at LNGS. A precise understanding of detector response and backgrounds is essential to quantify the sensitivity of this measurement.
Physics reach studies are performed using both data and Monte Carlo simulations based on Geant4 within the G4DS framework developed for the DarkSide program. The simulation is integrated into the full DarkSide software chain, where particle interactions and scintillation photon transport are handled in G4DS, the detector electronics response and waveform generation are simulated with DS-lab, and reconstructed observables are obtained using PyReco.
In this work we present the simulation framework developed for DArTinArDM and ongoing studies of signal and background response. Signal events arise from electron recoils produced by 39Ar β decays in liquid argon within a region of interest below 565 keV. Background contributions from radioactive decays in detector materials and the surrounding environment are investigated, together with their rejection using the ArDM veto detector, enabling sensitivity studies for the 39Ar measurement in UAr.
| Main Contribution topic | Direct detection |
|---|---|
| Secondary contribution topic | Instrumentation for Dark Matter |