A cosmic ray muons tomography system with triangular bar plastic scintillator detectors and improved 3d image reconstruction algorithm: A simulation study

Zhao Yanwei; Luo Xujia; Qin Kemian; Liu Guorui; Chen Daiyuan; Augusto R.S.; Zhang Weixiong; Luo Xiaogang; Liu Chunxian; Liu Juntao; Liu Zhiyi

doi:10.1016/j.net.2022.10.031

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자료유형: 학술저널

저자정보: Zhao Yanwei (Lanzhou University) Luo Xujia (Lanzhou University) Qin Kemian (Lanzhou University) Liu Guorui (Lanzhou University) Chen Daiyuan (Lanzhou University) Augusto R.S. (Lanzhou University) Zhang Weixiong (The Third Institute of Geology and Minerals Exploration Gansu Provincial Bureau of Geology and Minerals Exploration and Development) Luo Xiaogang (The Third Institute of Geology and Minerals Exploration Gansu Provincial Bureau of Geology and Minerals Exploration and Development) Liu Chunxian (The Third Institute of Geology and Minerals Exploration Gansu Provincial Bureau of Geology and Minerals Exploration and Development) Liu Juntao (Lanzhou University) Liu Zhiyi (Lanzhou University)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제2호

발행연도: 2023.2

수록면: 681 - 689 (9page)

DOI: 10.1016/j.net.2022.10.031

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Purpose: Muons are characterized by a strong penetrating ability and can travel through thousands of meters of rock, making them ideal to image large volumes and substances typically impenetrable to, for example, electrons and photons. The feasibility of 3D image reconstruction and material identification based on a cosmic ray muons tomography (MT) system with triangular bar plastic scintillator detectors has been verified in this paper. Our prototype shows potential application value and the authors wish to apply this prototype system to 3D imaging. In addition, an MT experiment with the same detector system is also in progress. Methods: A simulation based on GEANT4 was developed to study cosmic ray muons' physical processes and motion trails. The yield and transportation of optical photons scintillated in each triangular bar of the detector system were reproduced. An image reconstruction algorithm and correction method based on muon scattering, which differs from the conventional PoCA algorithm, has been developed based on simulation data and verified by experimental data. Results: According to the simulation result, the detector system’s position resolution is below 1 ~ mm in simulation and 2 mm in the experiment. A relatively legible 3D image of lead bricks in size of 20 cm 5 cm 10 cm used our inversion algorithm can be presented below 1 104 effective events, which takes 16 h of acquisition time experimentally. Conclusion: The proposed method is a potential candidate to monitor the cosmic ray MT accurately. Monte Carlo simulations have been performed to discuss the application of the detector and the simulation results have indicated that the detector can be used in cosmic ray MT. The cosmic ray MT experiment is currently underway. Furthermore, the proposal also has the potential to scan the earth, buildings, and other structures of interest including for instance computerized imaging in an archaeological framework.

#Muons tomography (MT) #GEANT4 simulation #Triangular bar #Scintillator detector #Image reconstruction algorithm

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