New CHOD Detector for the NA62 Experiment at CERN

摘要

The New CHOD is a scintillation hodoscope with a pad structure featuring a total of 148 counters. The signal from each pad is read out using wavelength-shifting fibers and two or four SensL SiPMs with a sensitive area of 3 x 3 mm(2). This photodetector has 4774 pixels 35 x 35 mu m(2) in size. The key parameters (photon detection efficiency, dark current, crosstalk, and gain) were measured for 500 SiPMs.