Performance studies of a SiPM-readout system with a pico-second timing chip

A pico-second timing (PIST) front-end electronic chip has been developed using 55 nm CMOS technology for future electron-positron collider experiments (namely Higgs factories). Extensive tests have been performed to evaluate the timing performance of a dedicated SiPM-readout system equipped with a PIST chip. The results show that the system timing resolution can achieve 45 ps for SiPM signals at the minimum-ionizing particles (MIP) level (200 p.e.) and better than 10 ps for signals larger than 1200 p.e., while the PIST intrinsic timing resolution is 4.76 ± 0.60 ps. The PIST dynamic range has been further extended using the time-over-threshold (ToT) technique, which can cover the SiPM response spanning from ∼ 900 p.e. to ∼ 40000 p.e..