Measurement of parameters of scintillating bars with wavelength-shifting fibres and silicon photomultiplier readout for the SHiP Muon Detector

TL;DR

This study measures the light yield and timing performance of scintillating bars with wavelength-shifting fibres and silicon photomultipliers, demonstrating suitability for the SHiP Muon Detector with high resolution and consistent light output.

Contribution

It provides detailed measurements of scintillating bar parameters using different configurations, confirming their effectiveness for the SHiP Muon Detector.

Findings

Time resolution better than 800 ps

Light yield of approximately 140 photoelectrons

Consistent performance along the bar length

Abstract

The light yield and the time resolution of different types of 3 m long scintillating bars instrumented with wavelength shifting fibres and read out by different models of silicon photomultipliers have been measured at a test beam at the T9 area at the CERN Proton Synchrotron. The results obtained with different configurations are presented. A time resolution better than 800 ps, constant along the bar length within 20%, and a light yield of ~ 140 (70) photoelectrons are obtained for bars 3 m long, 4.5 (5) cm wide and 2 (0.7) cm thick. These results nicely match the requirements for the Muon Detector of the SHiP experiment.