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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 overcome the shortcomings of the traditional nuclear material identification system (NMIS) with single characteristic label and limited types of extracted nuclear material parameters, time-of-flight (TOF) and pulse waveform identification (PSD) techniques were introduced into the NMIS feature extraction and recognition system. Differentiate the neutron signal and γ signal by PSD technique and explore the time-domain feature label that can describe the relative position difference between the nuclear material and the detector based on the differences of the time-of-flight spectra of neutron and γ signals under different detector positions. Simulation results show that this method can identify the relative position of unknown nuclear components.