基于新型深层钻井型缪子探测器的缪子透射成像研究  

Research on Muon Transmission Imaging Based on a Novel Deep Borehole Muon Detector

作　　者：尹隆乡 罗思远 曾国强[3] 王克 冯松 冯胜洋 张海峰 冯春添[1,2] 廖伶元 王晓冬[1,2] YIN Longxiang;LUO Siyuan;ZENG Guoqiang;WANG Ke;FENG Song;FENG Shengyang;ZHANG Haifeng;FENG Chuntian;LIAO Lingyuan;WANG xiaodong(School of Nuclear Science and Technology,University of South China,Hengyang,421001,China;Key Laboratory of Advanced Nuclear Energy Technology Design and Safety,Ministry of Education,Hengyang,421001,China;The College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu,610059,China;School of Resources Environment and Safety Engineering,University of South China,Hengyang,421001,China)

机构地区：[1]南华大学核科学技术学院,衡阳421200 [2]先进核能技术设计与安全教育部重点实验室,衡阳421200 [3]成都理工大学核技术与自动化工程学院,成都610059 [4]南华大学资源环境与安全工程学院,衡阳421200

出　　处：《核电子学与探测技术》2025年第1期37-46,共10页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(No.12275120);湖湘青年英才(No.2022RC1202);中国科学技术部(No.2020YFE0202001);湖南省研究生科研创新项目(CX20240083);湖南省教育厅科学研究项目(22C0232)。

摘　　要：缪子透射成像是一种通过测量宇宙射线缪子在穿过物体前后的通量变化来揭示其内部密度结构的技术。其非接触、无损的特点适用于对大型物体进行远距离成像,广泛应用于火山监测、考古、地下结构调查及矿产勘探等领域。目前,在矿产勘探应用中的一项挑战为设计出适应于深层钻井的探测器。该类型探测器要求在尽量减少读出电子学通道数量的前提下,在约500~800米深度保持良好成像质量。为解决上述技术难题,本文基于现有研究设计了一种新型钻井型缪子探测器,并利用制作的简化版物理模型进行了初步模拟与实验。使用蒙特卡罗GEANT4程序对探测器模型的角度分辨率进行了模拟研究,设计出缪子径迹算法,并利用该模型模拟探测天然缪子源。后续通过与该简化探测器实验结果的比较分析以验证该模型的可靠性,并针对大体积高Z物质进行了模拟成像。研究表明,该探测器模型可有效模拟缪子击中物体时SiPM的信号采集过程,所设计的缪子径迹算法能够准确计算缪子的入射方向(方位角分辨率2.41°,天顶角分辨率3.01°)。该简化探测器可实现对大体积高Z物质的探测,模拟结果可为实验提供参考依据。muon transmission imaging is a technique that reveals the internal density structure of a cosmic ray muon by measuring its flux change before and after passing through an object.Its non-contact and non-destructive characteristics are suitable for long-distance imaging of large objects,and are widely used in the fields of volcano monitoring,archaeology,underground structure investigation and mineral exploration.At present,one of the challenges in mineral exploration applications is to design detectors suitable for deep drilling.This type of detector requires good image quality at a depth of about 500 to 800meters while minimizing the number of readout electronics channels.In order to solve the technical problems mentioned above,a new type of drilling Muon detector is designed based on the existing research,and preliminary simulation and experiment are carried out by using the simplified physical model.The Monte-Carlo GEANT4 program is used to simulate the angular resolution of the detector model,and the muon track algorithm is designed,and the natural muon source is simulated by the model.The reliability of the model is verified by comparing with the experimental results of the simplified detector,and the simulation imaging is carried out for the large volume high Z material.The results show that the detector model can effectively simulate the signal acquisition process of SiPM when the muon hits the object,and the designed muon track algorithm can accurately calculate the incident direction of the muon(azimuth resolution is 2.41°and zenith resolution is 3.01°).The simplified detector can realize the detection of large volume high-Z material,and the simulation results can provide a reference for the experiment.

关 键 词：蒙特卡罗模拟 GEANT4 缪子成像 缪子径迹探测器 

分 类 号：TL814[核科学技术—核技术及应用]