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为多种复杂环境下的稳态和脉冲DT聚变中子能谱测量建立了一种灵敏度优化反冲质子磁谱仪.使用成像板和同位素α源测量了谱仪的反冲质子能量-位置投影关系.利用稳态加速器中子源平台、通过单粒子计数方法结合三维带电粒子输运程序模拟,研究了谱仪脉冲中子灵敏度能量响应.通过高探测效率参数设置使谱仪对DT中子的探测效率达到2×10 5cm2水平,从而在较弱中子源上获得了较高统计精度实验数据.程序模拟结果与谱仪α粒子刻度和DT中子标定实验结果取得了良好的一致性,可由此发展精细解谱技术,以提高脉冲中子能谱测量的灵敏度和能量分辨.
A sensitivity-optimized recoil proton magnetic spectrometer was built for steady-state and pulsed DT fusion neutron spectroscopy in a variety of complex environments. The recoil proton energy-position projection of the spectrometer was measured using an imaging plate and an isotope α-source The energy response of pulsed neutron sensitivity of the spectrometer was studied by using single-particle counting method combined with three-dimensional charged particle transport program simulation by using the steady-state accelerator neutron source platform. By setting the high detection efficiency parameter, The detection efficiency reaches 2 × 10 5 cm 2, and the experimental data with higher statistical accuracy on weak neutron sources are obtained.The simulation results agree well with the experimental results of spectrometer α-particle scale and DT neutron calibration, This develops fine-resolution spectroscopy to improve the sensitivity and energy resolution of pulsed neutron spectroscopy.