The cosmic ray muons tomography system with wavelength shifting fiber and plastic scintillator plane and vertical borehole detectors and improved 3d image reconstruction algorithm: a simulation study

Abstract In this paper, a cosmic ray muon plane detector tomography system based on wavelength shifting fiber and scintillation is built in GEANT4, and the relevant experimental platform is established, then the image reconstruction experiment based on the muon scattering imaging principle is carried out. Finally, based on the research above, a vertical drilling muon detector system is proposed and the simulation studies is completed. The position resolution of the fiber-scintillation detector system is studied in detail, and the chamber position resolution of parallel fiber-optic grid with different parameters is described and compared. Based on the experimental data of the plane detector system, an image reconstruction algorithm and correction method based on muon scattering are proposed, and some engineering applications of the vertical borehole detector system are simulated. The general guiding theory applicable to fiber-scintillation detectors has not been established and detailed simulation studies are required through simulation programs. By using GEANT4, the photon-photon yield of optical light in WLS fiber can be extracted and compared with the existing experiments. The simulation results are in good agreement with the experimental results, indicating that the detector system modeled in the simulation study has high reliability and practical value.