Design studies on large muon trigger detectors using silicon photomultiplier devices

This work presents the design and experimental evaluation of muon trigger detectors tailored for industrial-scale applications. Studies were conducted using an organic scintillator plate measuring 250×250×10mm3, configured with varying numbers of silicon photomultiplier (SiPM) devices, each with a detection area of 4×4mm2. Various reflective materials, such as reflective paint, aluminum foil, and high-gloss paper, were applied to enhance the detected scintillation photon yield. Particular attention was given to optimize dark count suppression and muon event discrimination. Four detector configurations were designed, optimized, and evaluated individually. Spatially resolved muon detection efficiency was assessed using a muon coincidence detector with an active area of 50×50mm2. The assembly procedures for the different detector configurations are also discussed. Finally, a trigger detector configuration incorporating a single SiPM device coupled with a wavelength-shifting fiber clamp was identified as providing the most efficient collection for scintillation photon yield. This configuration is cost-effective, modular, and easy to mass-produce, making it well-suited for the developing of large-scale muon trigger detectors for industrial applications.