Speaker
Description
High Rate Picosecond Photodetectors (HRPPDs) are Micro-Channel Plate (MCP) based DC-coupled photosensors recently introduced by Incom, Inc. that have an active area of 104 mm by 104 mm, pixel pitch 3.25 mm and timing resolution on the order of 30-40 ps for a single photon detection. As such, these photosensors are very well suited for Ring Imaging CHerenkov (RICH) detectors that can also provide high resolution timing capability.
One of the emerging applications for this type of sensor is a proximity focusing RICH (pfRICH) in the backward endcap of the ePIC detector for the Electron-Ion Collider (EIC), which will be sited at Brookhaven National Laboratory. The pfRICH will cover an angular acceptance of -3.5 < $\eta$ < -1.5, provide a positive kaon identification at a 3$\sigma$ level up to ~7 GeV/c, and provide a timing reference of ~20 ps for the ePIC barrel and forward endcap Time of Flight subsystems.
Recently, a new version of HRPPDs has been developed that were substantially re-designed for use at the EIC, and a first batch of seven “EIC HRPPDs” was manufactured in early 2024. Results of a systematic evaluation of these first EIC HRPPD tiles, including gain and quantum efficiency (QE) uniformity, timing resolution, and dark count rates (DCR) will be presented. Modeling results, illustrating the expected pfRICH performance in ePIC detector, will also be presented.
