Speaker
Description
Silicon photomultipliers (SiPMs) are the candidatel photodetector
technologies for the dual-radiator Ring-Imaging Cherenkov (dRICH) detector of the ePIC experiment at the Electron-Ion Collider (EIC).
SiPMs are a cheap and reliable solution with the main drawback being they are radiation sensitive devices. In an effort to understand how these sensors could deteriorate in themoderate radiation environment at their location in the dRICH detector several irradiation campaigns have been performed in 2021 and 2022 and a new one is currently carried out in 2023.
Sensors from various manufacturers were characterised at various stages: when new, after irradiation and after the following annealing cycle(s). The latter is a technique that warms the device to high temperature (~180°C) to recover the displacement damage by means of thermal excitation. This cure method recovers a large fraction of the detector performance and can be performed in various fashions with each having their advantages and drawbacks.
In this talk I will discuss the results of the characterisation campaigns and the present one so far, with a focus on the strategies we foresee to study to mitigate and recover the radiation damage for the future detector. In particular the results for the annealing procedures in an external oven and by directly heating the device through direct and reverse current will be discussed.
