Direct search for dark matter with DarkSide-20k experiment

• Marie van Uffelen (CPPM, Aix Marseille Université, CNRS/IN2P3)

The DarkSide-20k experiment is the next Dark Matter Direct Detection experiment searching for WIMPs with argon double phase Time Projection Chamber (TPC). It benefits from the strength of its predecessors DarkSide-50 and DEAP-3600. DarkSide-50 especially currently has the world best limits on WIMP search in the low mass range, between 1.2 GeV and 3.6 GeV, after re-analysis of low energy data from 12 ton.day exposure (2207.11966). The strength of this result motivates the computation of the sensitivity projection of DarkSide-20k at low mass (1 GeV to 10 GeV). During this talk, I will present the detection principle in a double phase TPC and the peculiar analysis leading to the DarkSide-20k low mass sensitivity projection.

Préparation de la mission spatiale Euclid : étude des corrélations, au niveau pixel, de la réponse des détecteurs infrarouges

• Jean LE GRAET ({AIX-MARSEILLE UNIV}UMR7346)

Launched in July 2023, the Euclid satellite embarks on a mission to unveil the mysteries of the dark universe, probing the nature of dark energy and dark matter. At the heart of this quest lies the Near Infrared Spectrophotometer (NISP), tasked with measuring the spectroscopic redshifts of 40 million galaxies. Critical to NISP's success are 16 high-performance HgCdTe detectors, each housing a mosaic of 4 million hybrid pixels. Crucially, ensuring 95% operational pixel capacity and achieving sub-one-percent accuracy in flux measurement post-correction are imperative for NISP's scientific success. My work addresses this challenge on two fronts. First, I develop methods to decorrelate various pixel response parameters, crucial for generating reference maps essential in correcting and processing flight data. Second, I conduct a spatial analysis of pixel response parameters to ensure the operational viability of 95% of the pixels. This comprehensive approach validates Euclid's precision requirements, advancing our understanding of the dark universe.

Control, Operation, Run-in and Performance of the LAr calorimeter Ph-1 Upgrade electronics on the ATLAS Detector

• Florent Bernon

The new electronics built for the LAr calorimeter Ph-1 Upgrade is getting close to finalizing its installation. Commissioning works are well advanced and the integration into the full LAr system is ongoing. A large effort is still coming up when beam arrives. We expect an important adaptation of the Online SW to fully integrate these new electronics with all the aspects needed to successfully operate it in ATLAS. We plan for the use of modern computing techniques in this enterprise. Once the electronics is fully operational, an important milestone will be the assessment of the enhanced performance then the certification of this new trigger system in comparison to the legacy Level1 Calorimeter trigger to fully rely on this new electronics so that the legacy one be decommissioned. This work, together with some detailed calorimeter performance understanding with the readout of the new enhanced trigger Super-Cells, should lead to an instrumentation/applied physics PhD thesis, the details of which will be defined further on.