ATTRACT TWD Symposium: Trends, Wishes and Dreams in Detection and Imaging Technologies

High granularity scintillating fiber trackers based on Silicon Photomultiplier read-out

Not scheduled

10m

Auditorium & Conference Room (Other Institutes)

Speaker

Emanuele Ripiccini (UNIGE)

Description

Scintillating fibers coupled to photosensors provide flexible, fast and high granularity detectors which are able to work even in high rate environment. We will report about the performances obtained with a multi-layer detector prototype based on 250 μm multi-clad square scintillating fibers, 20 cm long, coupled
to 1.3×1.3 mm 2 active area silicon photomultiplier (SiPMs). Current measurements show results never reached up to now: high detection efficiency for minimum ionizing particles (m.i.p.) already with single layer (> 90%, mean collected light/fiber 8.5 phe). Also a good spatial resolution can be achieved by keeping the optical cross-talk between fibers at a negligible level (<1%). Finally, the time resolution of the order of 500 ps has been achieved for m.i.p. in a single layer configuration. The resolution improves with increasing the number of detector layers. All measurements have been supported with a Monte Carlo simulation based on Geant4 and a custom code, describing the response of the SiPMs.

Summary

Scintillating fibers coupled to photosensors provide flexible, fast and high granularity detectors which are able to work even in high rate environment. We will report about the performances obtained with a multi-layer detector prototype based on 250 μm multi-clad square scintillating fibers, 20 cm long, coupled
to 1.3×1.3 mm 2 active area silicon photomultiplier (SiPMs). Current measurements show results never reached up to now: high detection efficiency for minimum ionizing particles (m.i.p.) already with single layer (> 90%, mean collected light/fiber 8.5 phe). Also a good spatial resolution can be achieved by keeping the optical cross-talk between fibers at a negligible level (<1%). Finally, the time resolution of the order of 500 ps has been achieved for m.i.p. in a single layer configuration. The resolution improves with increasing the number of detector layers. All measurements have been supported with a Monte Carlo simulation based on Geant4 and a custom code, describing the response of the SiPMs.