一种基于裂变相关时间谱的NMIS特征标签提取方法  

A New NMIS Characteristic Signature Acquisition Method Based on Time-Domain Fission Correlation Spectrum

作　　者：魏彪[1] 杨帆 冯鹏[1] 任勇[3] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044 [2]四川省电力公司信息通信公司,成都610041 [3]重庆大学通信工程学院,重庆400044

出　　处：《核动力工程》2014年第1期10-13,共4页Nuclear Power Engineering

摘　　要：针对传统核材料识别系统(NMIS)特征标签单一,且提取核材料参数种类有限的缺点,将飞行时间法(TOF)与脉冲波形鉴别技术(PSD)引入NMIS的特征提取和识别体系。通过PSD技术区分中子信号与γ信号,并基于不同探测器位置条件下中子、γ信号飞行时间谱的差异,探索一种能够描述核材料与探测器间相对位置差异的时域特征标签。仿真实验结果表明,该方法能够初步识别未知核部件相对位置。To deal with the disadvantages of the homogeneous signature of the nuclea4＂ material identification system （NMIS） and limited methods to extract the characteristic parameters of the nuclear materials, an enhanced method using the combination of the Time-of-Flight （TOF） and the Pulse Shape Discrimination （PSD） was introduced into the traditional characteristic parameters extraction and recognition system of the NMIS. With the help of the PSD, the ~, signal and the neutron signal can be discriminated. Further based on the differences of the neutron~ flight time of the detectors in various positions, a new time- domain signature reflecting the position information of unknown nuclear material was investigated. The simulation result showed that the algorithm is feasible and helpful to identify the relative position of tmknown nuclear material.

关 键 词：NMIS 飞行时间法 波形鉴别 相关运算 

分 类 号：TL82[核科学技术—核技术及应用] TP274[自动化与计算机技术—检测技术与自动化装置]