Realistic modeling of radiation transmission inspection systems

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI:10.1109/PAC.1993.309091

K. Sale

{"title":"Realistic modeling of radiation transmission inspection systems","authors":"K. Sale","doi":"10.1109/PAC.1993.309091","DOIUrl":null,"url":null,"abstract":"We have applied Monte Carlo particle transport methods to assess a proposed neutron transmission inspection system for checked luggage. The geometry of the system and the time, energy and angle dependence of the source have been modeled in detail. A pulsed deuteron beam incident on a thick Be target generates a neutron pulse with a very broad energy spectrum which is detected after passage through the luggage item by a plastic scintillator detector operating in current mode (as opposed to pulse counting mode). The neutron transmission as a function of time information is used to infer the densities of hydrogen, carbon, oxygen and nitrogen in the volume sampled. The measured elemental densities can be compared to signatures for explosives or other contraband. By using such computational modeling it is possible to optimize many aspects of the design of an inspection system without costly and time consuming prototyping experiments or to determine that a proposed scheme will not work. The methods applied here can be used to evaluate neutron or photon schemes based on transmission, scattering or reaction techniques.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"17 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of International Conference on Particle Accelerators","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PAC.1993.309091","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

We have applied Monte Carlo particle transport methods to assess a proposed neutron transmission inspection system for checked luggage. The geometry of the system and the time, energy and angle dependence of the source have been modeled in detail. A pulsed deuteron beam incident on a thick Be target generates a neutron pulse with a very broad energy spectrum which is detected after passage through the luggage item by a plastic scintillator detector operating in current mode (as opposed to pulse counting mode). The neutron transmission as a function of time information is used to infer the densities of hydrogen, carbon, oxygen and nitrogen in the volume sampled. The measured elemental densities can be compared to signatures for explosives or other contraband. By using such computational modeling it is possible to optimize many aspects of the design of an inspection system without costly and time consuming prototyping experiments or to determine that a proposed scheme will not work. The methods applied here can be used to evaluate neutron or photon schemes based on transmission, scattering or reaction techniques.<>

查看原文本刊更多论文

辐射透射检测系统的现实建模

我们已经应用蒙特卡罗粒子输运方法来评估一个提议的中子透射检查系统的托运行李。对系统的几何形状和光源的时间、能量和角度依赖性进行了详细的建模。脉冲氘核束入射到厚Be靶上，产生一个能谱非常宽的中子脉冲，在穿过行李后，由工作在电流模式(与脉冲计数模式相反)的塑料闪烁体探测器检测到。中子透射率作为时间信息的函数被用来推断取样体积中氢、碳、氧和氮的密度。测量的元素密度可以与爆炸物或其他违禁品的特征进行比较。通过使用这种计算建模，可以优化检测系统设计的许多方面，而无需昂贵和耗时的原型实验或确定所提出的方案将不起作用。本文应用的方法可用于评估基于透射、散射或反应技术的中子或光子方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Proceedings of International Conference on Particle Accelerators

自引率

0.00%

发文量