| 平行束缪子透射成像蒙特卡罗模拟 |
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| 引用本文： | 以恒冠, 曾志, 王学武, 等. 平行束缪子透射成像蒙特卡罗模拟[J]. 强激光与粒子束, 2012, 24: 2987-2990. doi: 10.3788/HPLPB20122412.2987 |
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| 作者姓名： | 以恒冠 曾志 王学武 程建平 李君利 |
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| 作者单位： | 1.清华大学 工程物理系, 北京 1 00084;;;2.清华大学 粒子技术与辐射成像教育部重点实验室, 北京 1 00084 |
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| 基金项目： | 国家自然科学基金项目(11035002) |
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| 摘 要： | 使用蒙特卡罗程序Geant4，模拟平行束缪子垂直于理想探测器平面入射法国试验客体（FTO）模型，在模型的上方和下方各放置三块理想探测器，用以输出缪子位置信息，从而确定入射与出射缪子径迹。通过三种方法统计缪子穿过模型前后的透射比，对模型进行透射成像，得到不同的成像结果。统计方法一和方法二分辨力可达2 mm2 mm，统计方法三可达1 mm1 mm，Cu与W区分较为明显，而且可显示出FTO模型中心的空气球，FTO模型与模型周围空气的边界十分清晰。模拟结果表明，平行束入射缪子可以进行透射成像。
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| 关 键 词： | 蒙特卡罗方法 平行束缪子 透射成像 法国试验客体模型 |
| 收稿时间： | 2012-06-26 |
| 修稿时间： | 2012-08-29 |
Simulation of parallel muons transmission imaging using Monte Carlo method |
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| Yi Hengguan, Zeng Zhi, Wang Xuewu, et al. Simulation of parallel muons transmission imaging using Monte Carlo method[J]. High Power Laser and Particle Beams, 2012, 24: 2987-2990. doi: 10.3788/HPLPB20122412.2987 |
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| Authors: | Yi Hengguan Zeng Zhi Wang Xuewu Cheng Jianping Li Junli |
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| Affiliation: | 1. Department of Engineering Physics,Tsinghua University,Beijing 100084,China;;;2. Key Laboratory of Particle and Radiation Imaging,Ministry of Education,Tsinghua University,Beijing 100084,China |
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| Abstract: | The Monte Carlo method-based Geant4 program is used to simulate the parallel muons (which are perpendicular to the ideal detectors) injecting into the French Test Object (FTO) model. Six ideal detectors, three over the model and three under it, are used to output the positions of muons, with which the incident and scattered muons tracks can be determined. Different transmission images of the FTO model can be obtained through calculating the transmission ratio before and after the model with three methods. The resolution of the first method and the second method is 2 mm×2 mm, while the resolution of the third method is 1 mm×1 mm and the edge of Cu and W can be distinguished obviously. Even the air sphere in the center of the FTO model can be observed visibly. Through all the three methods, the boundaries of the FTO model and the air outside it are very clear. The simulation results of transmission imaging indicate that the methods of parallel incident muons is feasible and practicable. |
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| Keywords: | Monte Carlo method parallel muons transmission imaging French Test Object model |
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