We report on the design and performance of the Digitizer ReAdout Controller (DIRAC) of the Mu2e electromagnetic calorimeter, which consists of a 670 CsI crystals matrix readout by SiPM. The 20-channels DIRAC performs 200 MHz sampling of the SiPM signals transmitted by the front-end electronics. Operation in the Mu2e hostile environment expected Total Ionizing Dose (TID) of 12 Krad and neutron fluence of 5x1010 n/cm2 @ 1 MeVeq (Si)/y, 1T magnetic field, level of vacuum of 10-4 Torr has made the DIRAC design challenging. We describe design, specifications, architecture and results of the performance tests performed on the DIRAC prototypes.
Presentation given at the TWEPP 2019, Topical Workshop on Electronics for Particle Physics, 2-6 September 2019, Santiago De Compostela, Spain.
