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arXiv 0811.0187physics.ins-det
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用于高Z材料探测的带微模式气体探测器的Cosmic Ray μ子层析成像系统的GEANT4模拟

GEANT4 Simulation of a Cosmic Ray Muon Tomography System with Micro-Pattern Gas Detectors for the Detection of High-Z Materials

Marcus Hohlmann, Patrick Ford, Kondo Gnanvo, Jennifer Helsby, David Pena, Richard Hoch, Debasis Mitra

摘要:

μ子层析成像(MT)的基础上的测量大气宇宙射线μ子穿越集装箱的多次散射是一个有前途的候选人,用于识别威胁高Z材料。由于具有高空间分辨率的位置敏感探测器应特别适合于在MT应用中跟踪μ子,因此我们建议使用紧凑的微图案气体探测器,如气体电子倍增器(GEMs),用于μ子断层扫描。我们提出了一个详细的GEANT 4模拟基于GEM的MT站的各种情况下的威胁材料检测。宇宙射线μ介子轨道穿过材料重建与点的最接近算法形成三维断层图像的目标材料。我们调查接受,Z-歧视能力,高Z材料和屏蔽材料内的货物,和探测器分辨率的影响,这样的MT站的位置的影响。

英文摘要:

Muon Tomography (MT) based on the measurement of multiple scattering of atmospheric cosmic ray muons traversing shipping containers is a promising candidate for identifying threatening high-Z materials. Since position-sensitive detectors with high spatial resolution should be particularly suited for tracking muons in an MT application, we propose to use compact micro-pattern gas detectors, such as Gas Electron Multipliers (GEMs), for muon tomography. We present a detailed GEANT4 simulation of a GEM-based MT station for various scenarios of threat material detection. Cosmic ray muon tracks crossing the material are reconstructed with a Point-Of-Closest-Approach algorithm to form 3D tomographic images of the target material. We investigate acceptance, Z-discrimination capability, effects of placement of high-Z material and shielding materials inside the cargo, and detector resolution effects for such a MT station.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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