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arXiv · 2505.10658

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
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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.

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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. 2025-05-15. HRPPD photosensors for RICH detectors with a high resolution timing capability. https://doi.org/10.1016/j.nima.2025.170964

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