数字化宽量程裂变室中子测量模拟研究  

Simulation Study on Fission Chamber Digital Wide-Range Neutron Flux Measurement

作　　者：张思颖 何高魁[1] ZHANG Si-ying;HE Gao-kui(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《核电子学与探测技术》2021年第6期979-985,共7页Nuclear Electronics & Detection Technology

基　　金：国家财政部稳定支持研究经费(WDJC-2019-08)资助。

摘　　要：建立了裂变室输出信号仿真模型,利用MATLAB模拟了裂变室各注量率下带电子学噪声的输出信号波形,并进行高斯成形滤波处理以提高信噪比和稳定性,分别计算了三种工作模式下的中子注量率并以此进行对比分析。将模拟波形数据存入FPGA的ROM中,运用MODELSIM软件进行波形仿真,设计FPGA算法进行中子注量率的计算,实现裂变室三种工作模式的信号处理。The research on the detection of neutron fluence rate of nuclear reactors has always been one of the key contents of the research of reactor nuclear measurement systems at home and abroad.The neutron fluence rate is an important parameter of nuclear reactors.This paper first established the fission chamber output signal simulation model,used MATLAB to simulate the output signal waveform with electronic noise at each fluence rate of the fission chamber,and performed Gaussian shaping filter processing to improve the signal-to-noise ratio and stability.The neutron fluence rate under this working mode is used for comparative analysis.Store the analog waveform data in the ROM of FPGA,use MODELSIM software to simulate the waveform,design FPGA algorithm to calculate the neutron fluence rate,and realize the signal processing of the three working modes of the fission chamber.

关 键 词：裂变室 中子注量率 数字化 宽量程 

分 类 号：TL822[核科学技术—核技术及应用]