Front end electronics of the Belle II Aerogel Ring Imaging detector

Sumitted to PubDB: 2018-10-31

Category: Proceeding, Visibility: Public

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Authors	Rok Pestotnik
Date	Oct. 31, 2018
Belle II Number	BELLE2-CONF-PROC-2018-023
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.