紧凑型磁质子反冲谱仪磁分析系统的能量刻度

Energy Calibration of Magnetic Analysis System for Compact Magnetic Proton Recoil Spectrometer

介绍了一种用于多种特定环境下脉冲氘氚聚变中子能谱测量的紧凑型磁质子反冲谱仪的磁分析系统。通过三维粒子输运和蒙特卡罗模拟对磁分析系统性能进行了分析,使用CR-39径迹探测器和多个能量α单能粒子对系统进行了能量刻度。结果表明,磁分析系统具有良好的能量离散与聚焦性能,对给定能量范围的反冲质子,能够以1.5%～2.1%的能量分辨率实现(0.5～1.4)×10-4的探测效率。

A magnetic analysis system for a compact magnetic proton recoil spectrometer dedicated to pulse DT neutron spectroscopy in special experimental environments was presented.Performance of the system was analyzed using 3-D particle transport calculation and Monte-Carlo simulation.Energy calibration of the system was obtained using CR-39 track detector and mono-energetic α particles.The results indicate that the magnetic analysis system has achieved satisfactory performance on energy dispersion and focusing.It can achieve a detection efficiency of approximately（0.5-1.4）×10-4 with an energy resolution from 1.5% to 2.1%（for 7 MeV protons） in a given energy range of recoil protons.