Speaker
Description
Darkside-20k is currently under construction at the Gran Sasso Laboratory (LNGS) by the
Global Argon Dark Matter Collaboration. DarkSide-20k comprises a target mass of 50 tonnes of
low-radioactivity underground argon (UAr) in a dual phase time projection chamber (TPC),
surrounded by an instrumented inner neutron veto and outer cosmic veto. The main aim of this
detector is to search for the interaction of Dark Matter particles with the UAr target, probing
down to the neutrino fog.
Darkside-20k is designed to be instrumentally background free during the planned exposure of
200 t-yr. Towards this goal, the detector utilises novel technologies including underground Ar
depleted in the radioactive 39Ar isotope, large-area cryogenic Silicon Photomultiplier (SiPM)
array photodetectors. These bespoke SiPM structures, assembled into photo detector
modules, meet the strict radiopurity, photon detection and noise requirements of DarkSide-
20k, and are employed to instrument both the TPC and veto systems. In this talk the novel
photon detector system status of DarkSide-20k will be described, with a focus on the ongoing
production of these photo detectors in Italy and the UK including the development of QA/QC
procedures to ensure optimum performance and minimise radioactivity levels
| Collaboration | DarkSide-20k |
|---|---|
| Role of Submitter | I am the presenter |
