天然宇宙射线μ子成像检测技术研究进展

Cosmic-ray Muon Imaging for nuclear materials detection

目的总结分析近年来在天然宇宙射线μ子成像检测技术上取得的发展与进步,并分析该项技术在核材料检测中的应用前景。方法通过测量天然宇宙射线中的μ子在穿透被探测物体前、后的位置以及飞行方向的信息,采用一定的算法对被探测区域的散射密度分布进行估计,从而判断是否有高Z物质的存在。结果分析和总结天然宇宙射线μ子成像检测技术相对现有检测技术的优点,以及目前在μ子成像检测技术中运用的重建算法。结论在针对核材料走私来说,μ子成像检测技术占有先天的优势,而且具有无射线安全风险、消耗能源少、造价低、对操作者没有特殊要求的优点。

Objective This paper introduces the development and progress of the cosmic-ray muon imaging these years. Method The cosmic-ray muon imaging is designed to detect nuclear materials by taking advantage of natural cosmic-ray-produced muons. When the muons pass ectory is affected by Coulomb Scattering from the atoms in the material. Con through an object, their trajceptuaUy, to identify a nuclear weapon hidden in a cargo container, one could measure the incoming and outgoing directions of the muons. Results Compare cosmic-ray muon imaging with other methods and show its advantages ; analyze the reconstruction methods. Conclusion Cosmic-ray muon imaging is harmless to the environment, safe, low cost. It requires minimal electrical power and doesn＇t dependent on operator skill.