DarkSide-20k SiPM tile production paper released

A new DarkSide-20k paper, Production, quality assurance and quality control of the SiPM Tiles for the DarkSide-20k Time Projection Chamber , describes how the photosensors for the experiment’s 21 m² SiPM array are built and tested.

The SiPMs are arranged into modular photosensors called Tiles, each integrating 24 SiPMs on a printed circuit board that provides signal amplification and power distribution; 16 Tiles form a Photo-Detector Unit. Production and quality control take place at Nuova Officina Assergi (NOA), an ISO-6 clean room at LNGS, and include wafer-level cryogenic characterization, die attaching, wire bonding, and electrical and optical validation of every Tile. The overall production yield exceeds 83.5%, meeting the requirements of the DarkSide-20k production plan.

The paper was published in Eur. Phys. J. C 85, 1334 (2025). Read more about DarkSide-20k and our detector R&D .