Sistema y método para estimar la dosis de radiación ultravioleta durante la esterilización del nitrógeno líquido
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Date
2020-11-24
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Universidad Antonio Nariño
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http://purl.org/coar/resource_type/c_bdcc
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Abstract
At the moment, there is no dosimeter that provides a real-time measurement of ultraviolet radiation dose at
cryogenic temperatures during the sterilization of liquid nitrogen, because the technical parameters are
defined at room temperature, and many of these change dramatically at temperature of -195 °C. In this
work, a prototype of a cryogenic dosimeter based on Silicon photomultipliers (SiPM) is designed, useful
for characterizing the dose of ultraviolet radiation measured in real time for quality control of cryogenic
applications in medicine, biology, biotechnology and industry. In this study, a simulation with optical
photons (253 nm) was performed in liquid and gaseous nitrogen, using Geant4 simulation toolkit. The
results present a zone of minimal UV radiation inside a container of liquid nitrogen, and a method for
estimating the radiation dose with one or more cryogenic SiPMs, located inside the container, especially in
the minimum radiation zone in order to certify the absence of microorganisms in the liquid nitrogen.