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Nuclear Security Application of Micro Electron-Beam Linear Accelerator X-Ray Source and 14MeV Neutron Source

微电子束直线加速器X射线源和14MeV中子源的核安全应用

基本信息

批准号：
19206102
负责人：
UESAKA Mitsuru
金额：
$ 30.87万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2007
资助国家：
日本
起止时间：
2007 至 2010
项目状态：
已结题

项目摘要

A nondestructive assay system for security management application is proposed. We employ a compact electron linac as an X-ray source and 14.1MeV neutron source. The combination of these novel technologies realizes a fast security scanning system. Due to a need for security screening instruments capable of detecting explosives and nuclear materials there is growing interest in neutron generator systems suitable for field use for applications broadly referred to as active neutron interrogation. The system incorporate hermetically-sealed particle accelerator tubes designed to produce fast neutrons using deuterium-tritium (En=14.1 MeV) fusion reactions. Employing next-generation features including advanced sealed-tube accelerator designs, all-digital control electronics and innovative housing configurations these systems are suitable for many different uses. The neutron source is used for active neutron The 950 keV portable X-band (9.4 GHz) linear accelerator (Linac) provides on-site high-energy X-ray inspection, including material recognition up to a certain precision. We have developed an X-band Linac system and have achieved the maximum 950 keV X-ray by using the low-power magnetron (250 kW) in a 2-ms pulse length. We have already experimentally verified the dual-energy X-ray material recognition with and without an energy filter. Further, the array of the scintillator detector for dual energy X-ray measurement without the energy filter is numerically analyzed and designed for much quicker measurements. Updated results will be presented.

提出了一种面向安全管理应用的无损检测系统。我们采用紧凑型电子直线加速器作为X射线源和14.1MeV中子源。这些新技术的结合实现了快速安全扫描系统。由于需要能够检测爆炸物和核材料的安全筛查仪器，因此对适用于广泛地称为主动中子询问的应用的现场使用的中子发生器系统的兴趣日益增长。该系统包括密封的粒子加速器管，旨在使用氘氚（En=14.1 MeV）聚变反应产生快中子。采用下一代功能，包括先进的密封管加速器设计，全数字控制电子和创新的外壳配置，这些系统适用于许多不同的用途。950 keV便携式X波段（9.4 GHz）直线加速器（Linac）提供现场高能X射线检测，包括达到一定精度的材料识别。我们研制了一套X波段直线加速器系统，并利用低功率磁控管（250 kW）在2 ms脉冲长度内获得了最大950 keV的X射线。我们已经通过实验验证了双能X射线材料识别的能量过滤器和没有。此外，在没有能量过滤器的情况下，用于双能量X射线测量的闪烁体探测器的阵列被数值分析和设计用于更快的测量。将提供更新的结果。