A simulation study on MURA coded aperture imaging to measure the symmetry attribution of plutonium component

ZHANG Songbai1 WU Jun1 XIE Dong1 TIAN Dongfeng2 1

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A simulation study on MURA coded aperture imaging to measure the symmetry attribution of plutonium component

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- A simulation study on MURA coded aperture imaging to measure the symmetry attribution of plutonium component
- NUCLEAR TECHNIQUES Vol. 33, Issue 7, (2010)
- 作者机构：
  
  1. 北京应用物理与计算数学研究所
  2. 中国工程物理研究院
- 作者简介：
- 基金信息：
  
  中国工程物理研究院基金(2009B0103010)资助
- DOI：
  CLC： O572.11
- Published：01 July 2010
- 稿件说明：
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[1]张松柏,伍钧,解东,田东风.基于MURA编码孔成像测量Pu部件对称性的数值模拟分析[J].核技术,2010,33(07):556-560.

ZHANG Songbai1 WU Jun1 XIE Dong1 TIAN Dongfeng2 1. A simulation study on MURA coded aperture imaging to measure the symmetry attribution of plutonium component[J]. Nuclear techniques, 2010, 33(7): 556-560.
[1]张松柏,伍钧,解东,田东风.基于MURA编码孔成像测量Pu部件对称性的数值模拟分析[J].核技术,2010,33(07):556-560. DOI：

ZHANG Songbai1 WU Jun1 XIE Dong1 TIAN Dongfeng2 1. A simulation study on MURA coded aperture imaging to measure the symmetry attribution of plutonium component[J]. Nuclear techniques, 2010, 33(7): 556-560. DOI：

摘要

通过分析MURA编码孔成像技术的原理

实现了MLEM重建算法的源物体图像重建。使用数值模拟方法

分析了413keV单能γ面源的MURA编码板成像全过程

通过对比分析重建源物体分布与实际源物体分布

验证了重建算法及程序的正确性。并通过MNCP程序模拟假想的Pu部件模型

在编码孔成像过程中

像平面上射线投影强度分布、直接重建及简单扣本底重建源物体分布

从而论证了MURA编码孔成像测量Pu部件对称性的可行性。数值模拟结果表明

编码孔成像测量Pu部件对称性与小孔成像相比

在保护敏感信息和提高射线利用效率方面

具备一定的优势。

Abstract

The MLEM(Maximum Likelihood-Expectation Maximization) algorithm is used to reconstruct the distribution of source based on the principle of MURA(Modified Uniformly Redundant Array) coded aperture imaging.Through numerical analyzing

the distribution of single energy 413 keV

a plane-source on the image plane is obtained.The reconstruction result by the MLEM algorithm agrees with the original distribution.Then

through the simulation of coded aperture image for the hypothetical Pu component by MCNP

and the image reconstruction of the source

the method based on coded aperture imaging to measure the symmetry attribution of plutonium component is validated.The numerical simulation result shows that coded aperture imaging is more advantage than pinhole imaging to measure the symmetry of Pu component in the fields of detection efficiency of gamma ray and protection of sensitive information.

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Related Author

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Related Institution

Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Jiading Campus

University of Chinese Academy of Sciences

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