Speaker
Description
The Upgrade II of the LHCb experiment poses new challenges for the Ring Imaging Cherenkov (RICH) detectors in terms of high radiation levels and increased photon density during the High-Lumi LHC phase. It will therefore be essential to redesign the optical layout of the detector, improving the resolution of the reconstructed Cherenkov angle, increasing spatial granularity, and introducing photon timing information.
In this context, the Silicon PhotoMultiplier (SiPM) is one of the most promising photosensor candidates: it offers high efficiency in single-photon detection, remarkable time resolution, good granularity, and relatively low costs. However, it suffers from a high noise rate (due to dark counts and correlated noise), which worsens under radiation exposure. This makes the development of radiation-hard SiPMs indispensable; to this end, a campaign is underway to study critical parameters such as dark count rate, photon detection efficiency, and time resolution as a function of temperature, including concepts for the cooling of the sensors in order to mitigate the dark counts.
This talk aims to present an overview of the technical and scientific challenges related to the upgrade of the RICH detectors, highlighting future perspectives and possible developments of SiPM technology in the High-Luminosity LHC era.
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