The Design and Mechanical Integration of Scintillation Modules for the SUB-Millicharge ExperimenT (SUBMET)

초록

We present a detailed description of the detector design for the SUB-Millicharge ExperimenT (SUBMET), developed to search for millicharged particles. The experiment probes a largely unexplored region of the charge-mass parameter space, focusing on particles with mass m(chi) < 1 . 6 GeV /c(2) and electric charge Q < 10(-3)e. The detector has been optimized to achieve high sensitivity to interactions of such particles while maintaining effective discrimination against background events. We provide a comprehensive overview of the key detector components, including scintillation modules, photomultiplier tubes, and the mechanical support structure. Furthermore, we present the results of weight and seismic analyses, which validate the structural integrity and operational safety of the detector under various conditions.