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arXiv · 2410.18731

The CRILIN calorimeter: gamma radiation resistance of crystals and SiPMs

A. Cemmi·B. D'Orsi·E. Di Meco·I. Di Sarcina·E. Diociaiuti·M. Moulson·D. Paesani·I. Sarra·J. Scifo·A. Verna
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Abstract

The Crilin calorimeter is a semi-homogeneous calorimetric system based on Lead Fluoride (PbF$_2$) crystals with UV-extended Silicon Photomultipliers (SiPMs) proposed for the Muon Collider. This study investigates the radiation resistance of crystals and SiPMs, subjected to 10 kGy gamma irradiation, equivalent to a 10-year service life in the Muon Collider. Our findings indicate that while PbF$_2$ crystals exhibit a decrease in transmittance post-irradiation with partial recovery over time, the alternative PbWO$_4$-Ultra Fast (PWO-UF) demonstrates exceptional radiation hardness, maintaining stable transmittance. SiPMs showed an increase in dark current and breakdown voltage post-irradiation, with less degradation observed in the SiPM biased during the exposure to radiation compared to the unbiased component. These results underscore the viability of PbF$_2$ for radiation-tolerant calorimeters, though improvements in production homogeneity are needed. The superior performance of PWO-UF crystals suggests they are a promising alternative for high-radiation applications, but their higher cost must be carefully considered.

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A. Cemmi, B. D'Orsi, E. Di Meco, I. Di Sarcina, E. Diociaiuti, M. Moulson, D. Paesani, I. Sarra, J. Scifo, A. Verna. 2024-10-24. The CRILIN calorimeter: gamma radiation resistance of crystals and SiPMs. https://doi.org/10.1088/1748-0221%2F19%2F10%2Fp10016

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