UV radiation dose in real time with a cryogenic SiPM using Monte Carlo-Geant4 simulation.

At the moment, there is no method that allows the user to calculate the dose of UV radiation during the liquid nitrogen (LN2) sterilization process while complying with quality control regulations. This article describes a simulating method using Geant4 to obtain the dose of UV radiation in real-time with a cryogenic Silicon PhotoMultipliers (SiPM) inside the LN2 container. The results present the zone of minimum UV radiation and the estimation of the radiation dose with a cryogenic SiPM, located in the minimum zone to certify the absence of microorganisms in the LN2.