基于扩展型多球中子谱仪的中子能谱测量

Measurement of Neutron Spectrum by Extended Range Neutron Multi-sphere Spectrometers

为了有效地测量加速器辐射场的中子能谱,论文通过FLUKA模拟的辐射场中子能谱和探测器能量响应选择出合适的扩展型多球中子谱仪、利用基于少道解谱理论的解谱程序来得到实验能谱以及积分注量统计。并通过计算与实验计数率的对比证明了该方法测量中子能谱的可行性,同时分析了实验的不足并给出了改进的建议。

To measure the neutron energy spectrum of accelerator radiation field effectively, suitable ERBSS （Extended Range Neutron Multi - sphere Spectrometer） was selected according to the neutron field spectrum and energy response simulated by FLUKA, and the experiment spectrum and integration fluence was worked out by unfolding program based on the ＂few - channel＂ unfolding theory. The feasibility of using this method for spectrum measurement was verified through comparison between the calculation and the experimental count rate. The defects of the experiment were analyzed and recommendations for improvement were given.