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中国先进研究堆(CARR)的建成为我国间接中子照相技术的发展及应用提供了重要的实验平台。本文基于CARR开展了间接中子照相方法的初步研究。首先利用蒙特卡罗方法计算分析了基于CARR开展间接中子照相测量的条件;然后根据这些条件,通过解析计算确定了间接成像两次曝光过程的实验参数;最后利用CARR的热中子孔道,以核燃料元件模拟件为样品进行了间接中子照相实验,并研究了间接中子照相成像数据的处理及分析方法。
The establishment of China Advanced Research Reactor (CARR) has provided an important experimental platform for the development and application of indirect neutron photography in China. This article based on the CARR to carry out a preliminary study of indirect neutron photography method. Firstly, the conditions of indirect neutron photogrammetry based on CARR were calculated and analyzed by Monte-Carlo method. Based on these conditions, the experimental parameters of the indirect imaging double exposure process were determined by analytical calculation. Finally, the thermal neutron channels of CARR Indirect neutron imaging experiments were performed on nuclear fuel element simulations and the methods of processing and analyzing indirect neutron imaging data were studied.