XII International Workshop on Ring Imaging Cherenkov Detectors - RICH2025

The DRD4 international Collaboration has been formed at the beginning of 2024 following the ECFA Detector R&D Roadmap. The scope of the Collaboration, which is anchored at CERN, is to bundle and boost R&D activities in photodetector technology and particle identification techniques for building future high-energy physics (HEP) experiments and facilities. DRD4 also covers scintillating fibre...

Saturated fluorocarbons (SFCs: CnF(2n+2)) are chosen for their optical properties as Cherenkov radiators, with C4F10 and CF4 currently used at CERN in the COMPASS and LHCb RICH detectors. New RICH detectors are being considered, which might again use C2F6 as a radiator gas, possibly blended with CO2.
Non-toxicity, nonconductivity, non-flammability and radiation resistance has also made...

This talk will give an overview of the electronics requirements for today’s and future RICH detectors. Key challenges in the design of RICH detectors are reviewed along with their impact on front-end electronics designs. This includes requirements for resolution in space and time, signal coupling to single-photon sensors and front-end data processing. Additional detector integration aspects...

Excellent PID is an essential requirement of the ePIC experiment at the EIC, where hadron identification in the forward region will be provided by the dRICH detector, using as radiators both aerogel and gas.
The motivation for the choice of hexafluoroethane (C2F6) as dRICH radiator gas is illustrated and the challenges related to this choice are discussed.
The main requirements on the...

Nuova Officina Assergi (NOA) is a novel semiconductor facility located at INFN Laboratori Nazionali del Gran Sasso (LNGS) and operational since the beginning of 2023. According to the ISO-14644-1 standard, it has been classified an ISO-6 clean room and it extends over a surface of 420 m2. The infrastructure is divided in two experimental areas with a reduced radon concentration. A larger...

The next generation of Ring Imaging Cherenkov (RICH) detectors imposes stringent requirements on photon detection technologies.
Silicon Photo-Multipliers (present on the market with different brand names, including SiPM and MPPC), offering
high photon detection efficiency ($\gtrsim 0.5$) in the near-UV,
fine granularity down to one mm pixel size,
excellent timing performance of the...

In the framework of the DRD4 Collaboration, work package 4.4, dedicated R&Ds are ongoing on the coupling of a thin Cherenkov radiator to Silicon Photomultiplier (SiPM) arrays for precise charged particle Time-of-Flight (TOF) measurements. Cherenkov prompt radiation emission is indeed ideal for ultimate timing performance for a TOF detector. A thin radiation with high refractive index as...

The latest research results on developing hydrophobic silica aerogel as a Cherenkov radiator are reported. Previously, our benchmark for the aerogel’s optical property was a transmission length of 40 mm at a 400-nm wavelength for a refractive index of 1.05. The maximum size of a single tile with no mechanical cracking was 18 cm × 18 cm × 2 cm while ensuring hydrophobic quality. These...