Study of SiPM for CEPC-AHCAL

Abstract The Circular Electron Positron Collider (CEPC) has been under developing for the precision measurements of the Higgs Boson. The requirement of jet energy resolution is 3 % ∼ 4% and the calorimeters should have high energy resolution. Particle Flow Algorithm (PFA) oriented highly granular calorimeters based on Arbor algorithm could achieve it and one option of Hadronic Calorimeter (HCAL) is Analog Hcal (AHCAL) composed of stainless steel as absorber and scintillator as active medium, individually read out by Silicon photomultipliers (SiPMs). In this paper, 6 types of SiPMs from Hamamatsu and Novel Device Laboratory (NDL) are compared for the CEPC-AHCAL. The performance on crosstalk, Dark Count Rate (DCR), gain and Minimum Ionization Particles (MIP) spectrum combined the front-end electronics (SPIROC2E) and different SiPMs are studied. The better performance among them is the SiPMs typed 13360-1325PE from Hamamatsu from our measurements.