Time resolution of the diamond sensors used in the Precision Proton Spectrometer

The Precision Proton Spectrometer (PPS) is a forward-proton spectrometer using near-beam detectors (inside Roman Pots, RPs) located symmetrically on both sides of IP5 at a distance of about 220 m. In addition to the tracking system, timing detectors were installed in 2017 to measure the Time-Of-Flight (TOF) of the protons produced in central exclusive interactions. Two cylindrical RPs were equipped with Diamond sensors. In 2018 the TOF system consisted of two single- and two double-diamond planes. This note describes the timing resolution of the sensors, a necessary ingredient to assess the precision of the TOF measurement.