Speaker
Description
The dual-radiator RICH (dRICH) detector of the ePIC experiment at the future Electron–Ion Collider will provide charged-hadron identification over a wide momentum range. To achieve the required single-photon sensitivity in a magnetic field environment, the dRICH photodetector system will employ silicon photomultipliers (SiPMs) covering an area of approximately 3 m² with 3 × 3 mm² pixels. This will constitute the first use of SiPMs for single-photon detection in a collider experiment. Their limited radiation tolerance, however, requires dedicated mitigation strategies to preserve single-photon counting performance and to control dark count rates over the lifetime of the experiment. We will present an overview of the ePIC dRICH photodetector system and the current status of the associated R&D program. Recent test beam results from CERN-PS and SPS will also be reported.
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