Ponente
Descripción
The DarkSide-20k experiment, currently under construction at the Laboratori Nazionali del Gran Sasso (LNGS), has been designed to lead the search for heavy WIMPs. While liquid argon offers powerful pulse-shape discrimination, its intrinsic cosmogenic Ar-39 activity (0.96 Bq/kg) poses is a show-stopper for multi-tonne dual-phase Time Projection Chambers. To address this, and following the successful experience of DarkSide-50, the Global Argon Dark Matter Collaboration (GADMC) has launched a program to procure and process underground argon (UAr) depleted in Ar-39 by a factor of at least 1400.
Three key facilities are involved in this effort: extraction at the Urania plant in Colorado (USA), isotopic purification in the ARIA distillation column in Sardinia (Italy), and the characterization in the DArT-in-ArDM setup at the Canfranc Underground Laboratory (Spain). In this talk, we will present the status and prospects of these infrastructures, with a particular focus on DArT and its initial commissioning runs.
