Study of timing properties of SiPMs at Fermilab

We continue our timing measurements of Silicon Photomultipliers (SiPM) at the picosecond level at Fermilab .. We using SiPMs readout based on Ortec system, also as on fast waveform digitizer DRS4 [1]. SiPM's signal pulse shape was investigated. The single photoelectron time resolution (SPTR) was measured for the signals coming from the SiPM's. Dependence of the SPTR on the SiPms size was measured. Results of the last test beam test with SiPMs are presented.