Design and cold test of a rectangular cavity beam position monitor

The CBPM is a kind of monitor which is used for the measurement of beam transverse position. It is becoming increasingly popular due to its high potential in resolution performance. In theory, the resolution can reach about 1 nanometer. In this paper, a rectangular CBPM is designed for it has better X-Y isolation than a cylindrical one. It has been simulated and measured, and the results agree with each other very well. The procedures and results for the simulation and the cold test will be shown later and it will be proved that this is a reliable method for the CBPM design.     

基于数据库进行乏燃料鉴别的多元统计分析研究

近年来,随着国际核军控形势的变化,包含防扩散、防核恐及核安保的多边国际军控合作越来越受到重视.核取证技术作为防扩散、防核恐及核安保的一项核心技术,在对涉核非法活动的威慑、阻止以及响应方面具有重要作用,值得深入研究.目前针对核取证技术的研究较多,主要集中于材料的表征和数据的解读.其中解读作为核取证研究技术中最重要的一环,所面对的对象是多种多样的,包括铀矿石、黄饼、核燃料、乏燃料等,而其中乏燃料由于其潜在的威胁越来越受到重视.本文聚焦于在核取证场景中利用多元统计分析方法进行乏燃料鉴别的研究,主要是利用因子分析、判别分析和回归分析方法对乏燃料组分进行分析,研究各方法的适用范围,并为未来可能的利用数据库进行乏燃料鉴别的工作提供理论依据与可行方案,为相关核取证溯源工作的顺利开展提供支撑.