The CUORE Data Acquisition System

Large mass bolometers, thanks to their good energy resolution and high radiopurity, can be used for rare event searches, such as neutrinoless double beta decay or dark matter direct detection. The bolometric technique has been adopted by the CUORE experiment which is composed by an array of 988 tellurium dioxide bolometers with a total active mass of 741 kg. The experiment started taking data in April 2017 at the Laboratori Nazionali del Gran Sasso (LNGS), Italy, with the scientific goal of searching for neutrinoless double beta decay of 130-Te. Given the increasing number of channels to be acquired, the readout chain became an important aspect of the construction of bolometer arrays. The CUORE data acquisition system here described, called Apollo, was initially developed for CUORE, but its high modularity and flexibility make it possible to use it also in other experiments, regardless of the specific characteristics of the setup such as the number of channels and the bolometer characteristics. Indeed, it has been used not only in CUORE but also in its predecessor CUORE-0, R&D projects and upgrades such as CUPID-0.