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DOE OSTI · 3029880

Studies of LAPPD and HRPPD photodetectors for Cherenkov imaging applications

Agarwala, Jinky [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)] (ORCID:0000000247547455)·Chatterjee, Chandradoy [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)]·Torre, Silvia Dalla [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)]·Gregori, Mauro [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)]·Kiselev, Alexander [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000251245564)·Minutoli, Saverio [Istituto Nazionale di Fisica Nucleare (INFN), Genova (Italy)] (ORCID:0009000859785742)·Osipenko, Mikhail [Istituto Nazionale di Fisica Nucleare (INFN), Genova (Italy)]·Ripani, Marco [Istituto Nazionale di Fisica Nucleare (INFN), Genova (Italy)] (ORCID:0000000186327538)·Tessarotto, Fulvio [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)]
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Abstract

HRPPDs are the baseline single-photon sensors for a classic proximity-focusing RICH (pfRICH) counter, one of the Cherenkov radiation-based PID subsystems of the ePIC detector at the EIC. We report SPE time resolution of 87 ps rms for an LAPPD unit detecting Cherenkov photons in a quartz lens at a CERN PS test beam (2022). We also present the degradation and partial recovery of gain and relative efficiency of an LAPPD unit as a function of the B-field strength (up to 1.5 T) and angular orientation, measured with vertical dipole magnets at CERN (2023–2024). Finally, we report preliminary results of an accelerated ageing study performed on an HRPPD unit in Trieste laboratory (2025).

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73 NUCLEAR PHYSICS AND RADIATION PHYSICSAgeingHRPPDLAPPDLarge-area single-photon sensorsMCPResponse in magnetic fieldsSPE time resolution

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Agarwala, Jinky [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)] (ORCID:0000000247547455), Chatterjee, Chandradoy [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)], Torre, Silvia Dalla [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)], Gregori, Mauro [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)], Kiselev, Alexander [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000251245564), Minutoli, Saverio [Istituto Nazionale di Fisica Nucleare (INFN), Genova (Italy)] (ORCID:0009000859785742), Osipenko, Mikhail [Istituto Nazionale di Fisica Nucleare (INFN), Genova (Italy)], Ripani, Marco [Istituto Nazionale di Fisica Nucleare (INFN), Genova (Italy)] (ORCID:0000000186327538), Tessarotto, Fulvio [Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)]. 2026-03-23. Studies of LAPPD and HRPPD photodetectors for Cherenkov imaging applications. https://doi.org/10.1016/j.nima.2026.171486

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