Development and Testing of a Large-Area Cosmic Ray Telescope with Millimeter-Level Positioning Precision

Cosmic ray muons are widely utilized as natural probes in particle physics experiments. A meter-scale cosmic-ray muon telescope was developed, comprising two parallel super-layers (1m * 1m) spaced by one meter. Each super-layer contains two orthogonal detection layers, each formed by eighteen closely packed modules, consisting of a plastic scintillating bar stacked in full coincidence over a scintillating fiber mat. The telescope detects muons using plastic scintillating bars and fibers, with signal matching to reduce the number of electronics channels.The innovative design enables the required detection precision and keeps the manufacturing cost low.Performance studies show that the telescope achieves a spatial resolution better than 2mm and a detection efficiency of about 85% for cosmic-ray muon detection.