Rok Pestotnik

31 October 2018

Abstract: In the forward end-cap of the Belle II spectrometer, a proximity focusing RICH with aerogel radiator will be used for charged particle identification. The detector, consisting of 4~cm aerogel radiator, 16~cm expansion volume and a photon detector with 420 Hybrid Avalanche Photo Detectors is mounted in a very confined space between central drift chamber and electromagnetic calorimeter, leaving only 5~cm space for the readout electronics. A low power front end read-out board is mounted at the back side of each of the photo sensor. All the boards have been tested before the installation in the spectrometer. In the contribution, the design and first experiences with the boards are presented.

Keyword(s): Proximity focusing RICH with an aerogel radiator ; Hybrid Avalanche Photo Detector ; Front End Electronics