Ponente
Descripción
Assessing the purity of the underground argon in terms of Ar-39 is crucial to ensure the successful operation of DarkSide-20k (DS-20k), a next-generation dark matter detector under construction by the Global Argon Dark Matter Collaboration (GADMC). To achieve this goal, the GADMC is constructing the DArTinArDM experiment at the LSC laboratory in Spain.
The radiopure DArT chamber (~1 liter), filled with underground argon, will be placed in the center of the ArDM detector. With ~1 ton atmospheric argon, ArDM will act as an active veto. DArTinArDM is designed to measure the Ar-39 depletion factor in the underground argon with a sensitivity grater than 0.1 mBq/kg. This measurement will be performed on small quantities from every batch of UAr guaranteeing that their radiopurity meets the requirements before filling DS-20k.
The DArT chamber is currently operating underground at LSC in a test cryostat, for the purpose of establishing hardware and software operation protocols, optimizing the setup's operating conditions, and developing analysis tools.
In parallel, the ArDM detector has been refurbished with a new passive shield and a new light detection system to minimize background events and consequently improve its sensitivity.
In this talk, I will provide an overview of the current status and prospects of the DArTinArDM project.
