HRPPD photosensors for RICH detectors with a high resolution timing capability
A. V. Lyashenko, J. Agarwala, A. Asaturyan, M. Aviles, B. Azmoun, C. Chatterjee, S. M. Clarke, S. Cwik, C. J. Hamel, Y. Jin, A. Kiselev, M. J. Minot, B. Page, M. A. Popecki, M. Purschke, S. Stoll, C. Woody
公開日: 2025/5/15
Abstract
Recently, a new version of DC-coupled High Rate Picosecond Photodetectors (DC-HRPPDs) substantially re-designed for use at the Electron-Ion Collider (EIC) has been developed. A first batch of seven 'EIC HRPPDs' was manufactured in early 2024. These HRPPDs are DC-coupled photosensors based on Micro-Channel Plates (MCPs) that have an active area of 104 mm by 104 mm, 32 x 32 direct readout pixel array at a pitch of 3.25 mm, peak quantum efficiency in excess of 30%, exceptionally low dark count rates and timing resolution of 15-20 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, especially in a configuration where a detected charged particle passes through the sensor window, which produces a localized flash containing a few dozens of Cherenkov photons in it.