介绍了252Cf源驱动功率谱密度法测量原理, 采用硬件和软件相结合的方式构建实现了一种实际的测量系统和研究平台, 以服务于反应堆核参数测量。描述了基于3通道、1 GHz采样率和1 ns同步精度的超高速数据采集卡的中子脉冲序列检测方法, 并设计了PC机端的数据处理流程和功率谱密度分析算法。实际测量结果表明, 该252Cf源驱动功率谱密度法测量系统能准确高效地得到核随机过程的相关函数和功率谱密度等重要标签参数。

The principle of 252Cf-source-driven power spectrum density measurement method is introduced. A measurement system and platform is realized accordingly, which is a combination of hardware and software, for measuring nuclear parameters. The detection method of neutron pulses based on an ultra-high-speed data acquisition card (three channels, 1 GHz sampling rate, 1 ns synchronization) is described, and the data processing process and the power spectrum density algorithm on PC are designed. This 252Cf-source-driven power spectrum density measurement system can effectively obtain the nuclear tag parameters of nuclear random processes, such as correlation function and power spectrum density.