Speaker
Description
Digital SiPM photo detectors offer several benefits over PMTs and SiPMs. They are radio-pure, allow for mechanically simple detector planes (low number of feedthroughs, low power), they deliver position and time of each photon with high granularity and may be cost effective. The challenges to address are the quality of the SPADs (dark counts, PDE) and the demonstration of a readout scheme suited for the application in XLZD. After the successful design and characterisation of a 1st generation digital SiPM chip using the IMS 350nm technology, we have designed a 2nd iteration for the XFAB 180nm technology with, for instance, a more versatile readout protocol, a much larger local hit buffer, precise time stamping and reduced power consumption. In the presentation, we want to summarise the status of the digital SiPM approach.