May 24 – 28, 2021
America/Vancouver timezone

Low radioactivity Argon for the DarkSide-20k experiment

May 25, 2021, 6:06 AM
18m
Parallel session talk Experiments: Dark Matter Detectors Experiments: Dark Matter Detectors

Speaker

Roberto Santorelli (Centro de Investigaciones Energéti cas Medioambientales y Tecno)

Description

A major worldwide effort is underway to procure the radiopure argon needed for DarkSide-20k (DS-20k), the first large scale detector of the new Global Argon Dark Matter Collaboration. The Urania project will extract and purify underground argon (UAr) from CO2 wells in the USA at a production rate of ~300 kg/day. Additional chemical purification of the UAr will be required prior to its use in the DS-20k LAr-TPC.The Aria project will purify UAr using a cryogenic distillation column (Seruci-I), located in Sardinia (Italy).Assessing the UAr purity in terms of Ar-39 is crucial for the physics program of the DarkSide-20k experiment. DArT is a small (∼1 litre) radiopure chamber that will measure the Ar-39 depletion factor in the UAr. The detector will be immersed in the active liquid Ar volume of ArDM (LSC, Spain), which will act as a veto for gammas from the detector materials and the surrounding rock.In this talk, I will review the status and prospects of the UAr projects for DarkSide-20k.

Primary author

Roberto Santorelli (Centro de Investigaciones Energéti cas Medioambientales y Tecno)

Presentation materials