New Improved Model and Accurate Analytical Response of SiPMs Coupled to Read-Out Electronics

In this letter, a recently published model of silicon photomultiplier (SiPM) sensors is profitably extended to include the important effects of the read-out electronics on the shape of the output pulse waveforms. An improved analytical expression has been developed, also accounting for the loading effect and bandwidth limitation of the coupled front-end, through which the SiPM dynamic response can be accurately reproduced and predicted. Experimental tests on actual detection systems corroborate the SiPM model and the analytical results.