XII International Workshop on Ring Imaging Cherenkov Detectors - RICH2025

CMOS-based individual SPAD detectors and arrays have seen a host of applications being explored and industrialised in the past years, relying on their single-photon detection capability, combined with excellent photon-timing precision and noiseless read-out (in the digital flavour). Manufactured in standard CMOS technologies, their sensitivity spans the entire spectrum, from NUV to NIR.
We...

Invited review talk

The dual-radiator Ring Imaging Cherenkov (dRICH) detector of the ePIC experiment at the future Electron-Ion Collider (EIC) will make use of SiPM sensors for the detection of the emitted Cherenkov light. The photodetector will cover $\sim$ 3 m$^2$ with 3$\times$3 mm$^2$ pixels, for a total of more than 300000 readout channels and will be the first application of SiPMs for single-photon...

Microchannel Plate Photomultiplier Tubes (MCP-PMT) devices represent the state-of-the-art in terms of picosecond timing resolution combined with low noise, high gain, and radiation hardness. However, with experiment upgrades producing higher luminosities, there are concerns over the ability of the existing technologies to achieve sufficiently high rates and longer tube lifetime in terms of...

Finely pixelated Micro-Channel Plate Photomultipliers (MCP-PMTs) are vacuum photosensors often used in Imaging Cherenkov detectors, such as Belle II TOP, future LHCb TORCH and PANDA DIRC detectors, as well as ePIC pfRICH and hpDIRC. This type of PMTs can have gain up to 10^7 and higher, timing resolution below 50 ps and sub-mm position resolution in a single photon mode, as well as peak...

The PANDA experiment at FAIR will use two DIRC detectors for charged particle identification via Cherenkov light. Given the harsh radiation environment and the placement of the photosensors in magnetic fields of ~1 Tesla, Microchannel Plate Photomultiplier Tubes (MCP-PMTs) were selected as the designated sensors to fulfill the stringent requirements for the DIRCs. For the Barrel DIRC, 155...

The Fast Interaction Trigger (FIT) detector of the ALICE apparatus at LHC includes a Cherenkov subsystem utilizing 52 Planacon XP85002/FIT-Q microchannel plate-based photomultiplier tubes (MCP-PMTs). Operating in the forward rapidity region of ALICE since 2021, these devices sustain radiation load equivalent to ~10^12 1-MeV n_eqv/cm^2 hadron fluence and ~100 kRad total ionizing dose. Moreover,...

The Accelerator Neutrino Neutron Experiment (ANNIE) is a 26-ton Fermilab-based effort studying neutrino cross-section physics on a water target, with particular attention to final-state neutron yields. The goal of ANNIE’s physics program is to better understand and constrain key systematic uncertainties on next-generation neutrino oscillation experiments. ANNIE is also a leading R&D platform...

We introduce a novel single-photon detector that incorporates a vacuum tube design featuring a photocathode, a microchannel plate (MCP), and a Timepix4 CMOS ASIC serving as the readout anode. Designed to handle detection rates of up to $10^9$ photons per second over a $7\,\text{cm}^2$ active area, the system achieves spatial resolution between $5$-$10\,\mu\text{m}$ and timing resolution better...

This study presents a comprehensive characterization of Large Area Picosecond Photodetectors (LAPPD) of Generation II, developed by Incom Inc., with a focus on their applicability in high-performance timing and imaging systems such as RICH detectors (e.g., Belle II ARICH, LHCb RICH) and time-of-flight PET imaging. LAPPDs combine single-photon sensitivity, ~30 ps time resolution,...

Large Area Picosecond Photon Detectors (LAPPDs) and High Rate Picosecond Photon Detectors (HRPPDs) are large area Micro-Channel Plate-PMTs (MCP-PMTs) resulting from a long-lasting collaboration between academy and industry. The atomic layer deposition technique that improves the MCP-PMT lifetime has been introduced within this development. These photosensors have a very good time resolution...