Design and qualification of the Mu2e electromagnetic calorimeter radiation monitor system

<!--HTML-->The Mu2e calorimeter and read-out electronics are hosted inside the superconducting magnet cryostat and exposed to an intense flux of ionizing and non-ionizing particles. The performance of a number of components is compromised by radiation damage. This includes the scintillating crystals and silicon photomultipliers (SiPM) whose performance degrades proportionally to both dose and neutrons fluence. The development of a radiation monitor is of vital importance for a reliable detector operation. A system that measures the dose and neutron fluence based on 24 peripheral stations and 4 master units distributed along the detector was built and calibrated.