A cosmic ray muons telescope based on bar plastic scintillator detectors

Abstract A cosmic ray muons telescope (CORMT) was designed to monitor the distribution of cosmic ray muons in the environment. CORMT is made of three main components: the mechanical structure, the detector, and the readout electronics. The mechanical structure consists of a support structure and a rotating moving platform that ensures the stability and accuracy of the test. The detector consists of four bar-shaped plastic scintillators each coupled with a silicon photomultiplier (SiPM). The readout electronics design uses Xilinx Artix 7 series field-programmable gate array (FPGA), combined with peripheral circuit design, to complete the readout of detector cosmic ray muons hit information. CORMT has the advantage of adjustable thresholds, real-time output, and the use of Coordinated Universal Time (UTC) to record events. The CORMT test results show that the detection efficiency can reach over 90%, the accidental compliance count rate is around 0.02, and the muon flux conforms to the distribution law. This article will discuss the design and performance of the CORMT.