Abstract
The HGCROC ASICs are dedicated very front-end electronics designed to read out the High Granularity Calorimeter (HGCAL), which will replace the present end-cap calorimeters of the Large Hadron Collider (LHC) for the Compact Muon Solenoid collaboration (CMS). The H2GCROC ASIC was especially designed to read out the SiPMs coupled to the scintillating tiles of the back hadronic sections, where the radiation constraints are less severe. Inside the chip, the front-end preamplifier is adapted for the SiPM’s higher signal level, expecting pC/MIP rather than fC/MIP ranges. The chip was received end of 2020 and extensively tested in the lab and test beam. This work examines the very front-end design and performance, including its performance with the sensor.
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