May 24 – 28, 2021
America/Vancouver timezone

Upgrade of Belle II ARICH detector

May 25, 2021, 5:00 AM
Poster Sensors: Light-based detectors Sensor Posters: Light-based Detectors


Rok Pestotnik (Jozef Stefan Institute (SI))


Aerogel RICH currently identifies charged particles in the Belle II spectrometer. Cherenkov photons, emitted in the aerogel radiator are detected by single-photon Hybrid Avalanche Photon sensors working in a 1.5 T magnetic field and occupying an area of 4.5 m$^2$. By 2030 the Belle II will reach its design goal of 50 ab$^{-1}$ and the HAPD performance will degrade. The upgrade of the spectrometer to extend its operation will thus require replacement of the ARICH photo-sensors. Silicon photomultipliers are one of the candidates. Due to its sizeable dark count rates and their sensitivity to neutrons – we expect fluences of up to $5\times10^{12}$ n/cm$^2$ - such a device requires to read out the signals in a narrow time window of several ns, requiring optimized SiPM design and high integration with the read-out electronics. In the presentation, we will present a SiPM module design, a study of single-photon detection capabilities of irradiated SiPMs and read-out FastIC chip.

TIPP2020 abstract resubmission? No, this is an entirely new submission.

Primary author

Rok Pestotnik (Jozef Stefan Institute (SI))


Giacomo Borghi (Fondazione Bruno Kessler) Rok Dolenec (Institut "Jožef Stefan") David Gascon (University of Barcelona (ES)) Alberto Gola (Fondazione Bruno Kessler) Samo Korpar Peter Krizan (University of Ljubljana) Joan Mauricio Dr Alberto Mazzi (Center for Materials and Microsystems, Fondazione Bruno Kessler, Trento, Italy) Sergio Gomez Fernandez (University of Barcelona (ES)) David Sanchez Gonzalo (University of Barcelona (ES)) Andrej Seljak

Presentation materials