2026/07/23 by Lucas Finazzi, Felipe Soriano, Leandro Gagliardi +4
Physics and Astronomy · #physics.ins-det
In this work, we present two fully open Analog Front End (AFE) designs for the simultaneous readout of the standard and fast outputs of ONSemi MicroFC-10035 Silicon Photomultipliers and report their main figure-of-merit parameters. The standard output AFE has a 1 p.e. amplitude of (394 ± 1) mV, which results in a Signal-to-Noise ratio of 30 dB. In addition, the fast AFE has a rise time of (1.3± 0.1) ns and a median electronic jitter of 34+7-5 ps, resulting in an excellent timing performance. Using these amplifiers for simultaneous dual readout, we demonstrate a proof-of-concept application, in which fast output timing information is used to suppress correlated noise events or pileup events present in the standard output charge measurements. This suppression results in a reduction of non-prompt correlated noise (delayed crosstalks and afterpulses) in dark conditions and an increase up to ∼14 in single photon discrimination under a continuous incident photon rate of 7.8 MHz/mm2. These results show that dual SiPM readout provides a practical way to remove correlated noise or pileup contamination in standard output charge measurements on an event-by-event basis.