Speaker
Description
The proposed next-generation dark matter experiment DARWIN, an underground multi-tonne scale detector with a time projection chamber at its core, aims to reach unprecedented sensitivities in probing further into the WIMP parameter space and other new physics interactions, such as neutrinoless double beta decay. To achieve these ambitious goals, extensive R&D campaigns are currently in progress, one of which consists of characterizing promising novel photosensors. We will present performance studies of Hamamatsu R12699-406-M4 flat panel photomultiplier tubes in xenon, conducted at our test facility MarmotX at the University of Zürich. Furthermore, a kg-scale TPC design to study the PMT performance in realistic experimental conditions is presented.