Speaker
Description
In the field of direct detection of light dark matter (DM) with masses below 10 GeV/c², the DarkSide-50 experiment, based on a dual-phase argon time projection chamber (DAr-TPC), has demonstrated competitive performance. Building on DarkSide-50, the DarkSide-LowMass experiment will focus on achieving low-threshold measurements and is projected to extend the search for light DM down to the neutrino fog region, spanning masses from sub-GeV/c² to around 10 GeV/c². To accurately identify the corresponding low-energy responses, both high detector performance and precise calibration of the argon ionization yield for nuclear recoil (NR) events are essential. To meet the demands of such low-threshold experiments with argon detectors, we are preparing an experiment using a small DAr-TPC to investigate various factors affecting the detector’s performance at low thresholds. Additionally, we aim to calibrate the liquid argon ionization response for nuclear recoils in the sub-keVnr energy region with a pulsed neutron beam. This poster will introduce the current status of the setup construction, the method to calibrate XY reconstruction with Au dots, and the preliminary testing results of the system.
