15～600 keV脉冲硬X射线能谱测量  

Energy spectrum measurement for pulsed hard X-ray from 15 keV to 600 keV

作　　者：苏兆锋 来定国 邱孟通 任书庆 徐启福 杨实 Su Zhaofeng;Lai Dingguo;Qiu Mengtong;Ren Shuqing;Xu Qifu;Yang Shi(State Key Laboratory of Intense Pulsed Radiation Simulation and Effect(Northwest Institute of Nuclear Technology),Xi’an 710024,China)

机构地区：[1]强脉冲辐射环境模拟与效应国家重点实验室(西北核技术研究院)

出　　处：《强激光与粒子束》2020年第3期128-132,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11875214);国家自然科学基金青年基金项目(11705150)

摘　　要：介绍了基于吸收法的脉冲硬X射线能谱测量的基本原理及设计思路,完成了探测器及吸收片的选型,设计了射线准直系统,研究了散射对测量的影响,以12路PIN探测器阵列及铜、铝吸收片为测量核心部件研制了脉冲硬X射线能谱测量系统。实验测量了真空环境下"闪光二号"加速器串级二极管产生的脉冲硬X射线强度,获得了不同衰减程度的实验波形,通过解谱获得了脉冲硬X射线的能谱,光子最高能量约600 keV,平均能量约89.1 keV,与理论计算的结果比较符合。This paper introduces the basic principle and design ideas of absorptive method for X-ray energy spectrum measurement. Si-PIN detectors array and Cu, Al attenuation materials were used to design the energy spectrometer combining theoretical calculation and experimental study. The collimating and anti-interference system was developed to obtain higher signal-to-noise ratio waveforms. The influence of scattering was researched. The different attenuation waveforms of pulsed hard X-ray at ShanguangⅡ accelerator were measured experimentally in the vacuum environment. The energy spectrum was calculated. The maximum energy of X-ray was about 600 keV, and the average energy was about 89.1 keV, which agreed with the calculation results.

关 键 词：“闪光二号”加速器 脉冲硬X射线 PIN探测器阵列 吸收法 能谱 

分 类 号：TL81[核科学技术—核技术及应用]