Test of scintillator bars coupled to Silicon Photomultipliers for a charged particle tracking device

This work is the first step in the implementation of a tracking detector for instrumenting a light spectrometer to study O(1 GeV) νμ CC interactions. A spatial resolution of O(1 mm) is required for the precise determination of momentum and charge of muons produced in such interactions. A tracking system prototype composed of planes of scintillator bars coupled to Silicon Photomultipliers in analog mode readout has been developed. The devised system provides a spatial resolution of better than 2 mm in reconstructing muon tracks. Results obtained in laboratory tests and with cosmic ray muons are discussed.