Width evaluation of horizontal slit in uranium slabs using a forward comparison method based on cosmic-ray muon scattering

Sa XIAO; Weibo HE; Maobing SHUAI; Mingcong LAN; Mengfu WEI

doi:10.11889/j.0253-3219.2017.hjs.40.050202

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Width evaluation of horizontal slit in uranium slabs using a forward comparison method based on cosmic-ray muon scattering

LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS | 更新时间：2021-05-19

- Width evaluation of horizontal slit in uranium slabs using a forward comparison method based on cosmic-ray muon scattering
- NUCLEAR TECHNIQUES Vol. 40, Issue 5, Article number: 050202(2017)
- 作者机构：
  
  中国工程物理研究院材料研究所江油 621907
- 作者简介：
- 基金信息：
  
  by Science and Technology Development Fund of China Academy of Engineering Physics
- DOI：10.11889/j.0253-3219.2017.hjs.40.050202
  CLC： TP312;TL81
- Received：15 November 2016，
  
  Revised：17 March 2017，
  
  Published：10 May 2017
- 稿件说明：
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Sa XIAO, Weibo HE, Maobing SHUAI, et al. Width evaluation of horizontal slit in uranium slabs using a forward comparison method based on cosmic-ray muon scattering[J]. Nuclear techniques, 2017, 40(5): 050202
DOI：

Sa XIAO, Weibo HE, Maobing SHUAI, et al. Width evaluation of horizontal slit in uranium slabs using a forward comparison method based on cosmic-ray muon scattering[J]. Nuclear techniques, 2017, 40(5): 050202 DOI： 10.11889/j.0253-3219.2017.hjs.40.050202.

摘要

针对经典μ子成像方法用于特殊对象结构探测的技术难点，提出了一种通过直接比较对象发生结构变化前后μ子散射特征的差异来进行形变类型和尺度判定的新思路，称为正向参比法。相比于经典的逆向反演法，该方法在原理上对于初始结构已知的特殊核对象的结构变化探测更有优势。从初步模拟结果来看，在合理的天然μ子通量下，该方法可实现铀板内亚毫米尺度水平狭缝的存在及其尺度的准确判定。

Abstract

Background

Muon tomography based on multiple Coulomb scattering (MCS) has been widely used in structural detection of nuclear objects. However

for some particular objects

the tomographic method would be thwarted by failing to imaging them.

Purpose

In view of the technical difficulties in structural detection of those objects

a novel method named "Forward Comparison Method (FCM)" was proposed.

Methods

Both the deformation and its scale were identified effectively by directly evaluating the evolution of muon scattering properties with respect to the object. This method

instead of the traditional inverse one

showed a methodological superiority in detection of nuclear objects with prior knowledge of the original structure.

Results

Preliminary results based on a computational simulation demonstrated that FCM could be used to identify the horizontal slit in a uranium slab and evaluate its width on the magnitude of sub-millimeters

on condition that the muon flux was reasonable.

Conclusion

The FCM method can be effectively applied in structural detection of particular nuclear objects of hollow structure on a satisfactory timescale.

关键词

Keywords

references

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