000001193 001__ 1193
000001193 005__ 20181031223821.0
000001193 037__ $$aBELLE2-CONF-PROC-2018-022
000001193 041__ $$aeng
000001193 100__ $$aRok Pestotnik
000001193 245__ $$aCalibration of the Belle II Aerogel Ring Imaging Detector
000001193 260__ $$a$$c2018-10-31
000001193 300__ $$a4
000001193 500__ $$asubmitted to NIMA
000001193 520__ $$aFor  efficient separation of hadrons in the forward end-cap of the Belle II spectrometer, an aerogel proximity focusing Ring Imaging Detector is installed in the high magnetic field between the central drift chamber and electromagnetic calorimeter. Cherenkov photons, emitted in the double layer aerogel radiator are expanded through the empty space and detected on the photon detector consisting of Hybrid Avalanche Photo diodes. The readout electronics working in a threshold mode records hit patterns registered during beam collisions. A particle identification algorithm based on the two dimensional extended maximum likelihood technique is used to assign probabilities for different particle hypotheses of tracks traversing the aerogel RICH detector. For efficient discrimination, the Aerogel RICH detector has to be calibrated. We present the key calibration steps used to optimize the detector performance.  
000001193 6531_ $$aProximity focusing RICH with an aerogel radiator
000001193 6531_ $$aParticle identification algorithm
000001193 6531_ $$aExtended maximum likelihood
000001193 8560_ $$frok.pestotnik@desy.de
000001193 8564_ $$uhttps://docs.belle2.org/record/1193/files/BELLE2-CONF-PROC-2018-022.pdf