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

提出了一种安全管理应用的无损检测系统。我们采用一个紧凑的电子直线加速器作为x射线源和14.1MeV的中子源。这些新技术的结合实现了一个快速的安全扫描系统。由于需要能够探测爆炸物和核材料的安全检查仪器，人们对适用于现场使用的中子发生器系统的兴趣日益浓厚，这些系统通常被称为主动中子探测。该系统包含密封的粒子加速器管，设计用于利用氘-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，全数字控制电子设备和创新的外壳配置，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。我们开发了一个x波段直线加速器系统，并通过使用低功率磁控管（250千瓦）在2毫秒脉冲长度下实现了最大950 keV x射线。我们已经通过实验验证了带和不带能量滤波器的双能x射线材料识别。此外，对无能量滤波器的双能x射线测量闪烁体探测器阵列进行了数值分析和设计，以实现更快的测量。更新后的结果将会公布。

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.