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. • A dosimetry system is necessary to monitor the dose of UV radiation during the sterilization of LN 2. • The distribution of UV photons inside a container of LN 2 was analyzed using Geant4 toolkit. • The zone of minimum UV radiation is defined from the radius and height of a LN2 container. • The cryogenic silicon photomultiplier is suitable for obtaining the dose of UV radiation inside the LN 2. [ABSTRACT FROM AUTHOR]