Cosmic ray muons can be used to detect materials which traditional methods cannot due to its high penetration ability. It's able to image 3-dimension density distribution of target by measuring scattering angle of muon tracks. We designed a muon imaging system aiming at the density reconstruction of various materials by measuring the scattering angle and momentum of cosmic ray muon. In addition, a GEANT4 simulation is developed to evaluate its material reconstruction performance. Detector prototypes composed of plastic scintillators with different geometries and SiPM readout modules are developed and tested. The test results show that 1.7 mm, 3.3 mm and 6.4 mm spatial resolution can be acquired by triangle, square and slab detector geometries respectively.

中文翻译：

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基于带有SiPM读数的塑料闪烁体探测器的宇宙射线成像系统

宇宙射线μ子可用于检测传统方法由于其高穿透能力而无法检测的材料。通过测量μ子轨道的散射角，可以对目标的三维密度分布进行成像。我们设计了一种μ子成像系统，旨在通过测量宇宙射线μ子的散射角和动量来重建各种材料的密度。此外，还开发了GEANT4仿真来评估其材料重建性能。开发并测试了由具有不同几何形状的塑料闪烁体和SiPM读数模块组成的检测器原型。测试结果表明，分别通过三角形，正方形和平板检测器几何形状可以获得1.7 mm，3.3 mm和6.4 mm的空间分辨率。