HGC update Zhiwen Zhao 2016/02/18.

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Presentation transcript:

HGC update Zhiwen Zhao 2016/02/18

Overview

Hit pattern on 4x4 of 2”MAPMT (pionm, at phi=0deg) 2.5GeV 7.5GeV 7.5deg 8.0deg 14.8deg 7.5deg 8.0deg 14.8deg Old configuration, PMT at r=239.7cm, z=325cm, tilt 44 degree New configuration, PMT at r=249.7cm, z=335cm, tilt 65 degree New configuration optimized for small angle where higher rate, higher background New configuration reply more on one bounce photons from mirror, less on two bounce photon from cone

Comparison Theta= 7.5deg and 8deg, increase by 20-30% Theta=14.8 deg, decrease by 20-30%

Result in pCDR