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Highly segmented scintillating detectors read out by silicon photomultipliers offer a potential solution for experiments with strict material and space constrains where precise time and position information is required. The current work addresses the performance of Kuraray SCSF81 round scintillating fibers with 250μm diameter readout by Hamamatsu MPPCs. Two to five fiber layers were assembled into ribbons and their time and position resolving capabilities were determined. Additionally, two coupling schemes between the scintillators and the photosensors were evaluated. In the first configuration, each individual fiber was mapped to an independent photosensor, while in the second, a whole fiber ribbon was attached to a multichannel silicon photomultiplier array. Their performance was characterized in accelerated proton and argon ion beams. For a ribbon of two fiber layers irradiated with heavy ions a position resolution of σpos ≈ 50 μm was achieved. Under the same conditions, a time resolution, σt , of better than 120 ps was measured.

A Scintillating Fibre System Readout by SiPMs for Precise Time and Position Measurements