Design of High Position Resolution Tracking Detector for Cosmic Ray Muon Tomography

Muon imaging has been used more and more in recent years. Based on the principle of multiple Coulomb scattering and the Molier formula, by detecting the direction of the incident muon and the exit muon, and according to a specific muon imaging algorithm, cosmic ray muon imaging can realize high-Z material identification and imaging. The high position resolution cosmic ray muon detection system can detect the incident and exiting positions of the muon more accurately, and can realize the material identification in a more detailed manner. Different detector designs will affect the position resolution of the detector systems and then affect the final imaging results. In this paper, different detectors are designed and simulated, and a high-resolution cosmic ray imaging system is obtained. In addition, different algorithm processing will also affect the imaging quality. The track reconstruction algorithm PoCA(The point of closest approach) based on scattering angle is used to reconstruct the system simulation results. And we put forward the direction of algorithm optimization.