2381/44023 S.A. Leach S.A. Leach J.S. Lapington J.S. Lapington J.O.D. Williams J.O.D. Williams C. Duffy C. Duffy CTA GCT project CTA GCT project Performance of the Compact High Energy Camera SiPM Prototype Front-End Electronics proposed for the Cherenkov Telescope Array University of Leicester 2019 CHEC CTA Front-end electronics Silicon photomultipliers SST Full-waveform readout 2019-05-08 13:42:22 Journal contribution https://figshare.le.ac.uk/articles/journal_contribution/Performance_of_the_Compact_High_Energy_Camera_SiPM_Prototype_Front-End_Electronics_proposed_for_the_Cherenkov_Telescope_Array/10216295 The Compact High Energy Camera (CHEC) is a full-waveform capture camera, designed and proposed for the dual mirror, Schwarzschild–Couder, Small Sized Telescope of the Cherenkov Telescope Array. CHEC-S, the second prototype, is based upon silicon photomultiplier (SiPM) photodetectors optimised for single photon counting and nanosecond timing. The camera liquid-cooled focal plane plate comprises a total of 2048 SiPM pixels organised as 32 independent sensor and front-end electronics (FEE) modules providing event detection and signal digitisation of Cherenkov light flashes. Each module comprises an 8 × 8 tile of SiPM pixels, coupled to a 64-channel preamplifier-buffer followed by a FEE module based around the TARGET chipset, which combines triggering (T5TEA) and waveform capture (TARGET C) functionality. We describe a selection of end-to-end performance tests and results conducted at the University of Leicester in the UK. Testing was performed at single module level focusing on characterising the SiPM photodetectors, optimised preamplifier-buffer and updated CHEC-S FEE readout module. Presented results include single photoelectron response, gain-matching, signal range, electronic channel crosstalk, SiPM angular dependency and optical crosstalk.