国内典型地区地面大气中子能谱测量与仿真  

Measurement and simulation of terrestrial atmosphericneutron spectrum in typical regions of China

作　　者：彭超 雷志锋[1] 张战刚[1] 杨少华[1] 来萍[1] 路国光[1] Peng Chao;Lei Zhifeng;Zhang Zhangang;Yang Shaohua;Lai Ping;Lu Guoguang(Science and Technology on Reliability Physics and Application of Electronic Component Laboratory,China Electronic Product Reliabilityand Environmental Testing Research Institute,Guangzhou 511370,China)

机构地区：[1]工业和信息化部电子第五研究所电子元器件可靠性物理及其应用技术重点实验室,广州511370

出　　处：《强激光与粒子束》2023年第5期153-158,共6页High Power Laser and Particle Beams

基　　金：广东省基础与应用基础研究基金项目(2021B1515120043);广州市科技计划项目(202102021201)。

摘　　要：基于多球能谱仪开展了广州、兰州和拉萨等地区的大气中子能谱和通量测量,获取了大气中子能谱的典型特征。测量结果表明:不同地区的大气中子通量受海拔高度的影响明显,地面大气中子通量随着海拔的增加而增加。此外,基于蒙特卡罗仿真工具也可以模拟初级宇宙射线粒子在地球大气层中的核反应过程,从而计算获取大气中子能谱。大气中子能谱测量数据与仿真数据吻合良好。Atmospheric neutrons can cause the single event effect(SEE)of integrated circuits,resulting in dataloss or functional interrupt.The SEE failure rate caused by atmospheric neutrons depends on its flux,thus obtainingthe atmospheric neutron flux is the premise of SEE failure rate assessment.In this paper,the atmospheric neutronenergy spectra and fluxes in Guangzhou,Lanzhou and Lhasa are measured using the Bonner sphere spectrometers(BSS).Typical characteristics of atmospheric neutron spectrum are obtained.The measured results show that theatmospheric neutron flux in different areas is affected by the altitude,and the terrestrial atmospheric neutron fluxincreases with the altitude.In addition,the nuclear reaction process of primary cosmic ray particles in the earth’satmosphere can also be simulated based on the Monte Carlo simulation tools,so as to calculate the atmosphericneutron spectrum.It shows that the measured data of atmospheric neutron spectra are in good agreement with thesimulation data.These data can be used in quantitative evaluation of atmospheric neutron-induced SEE of integratedcircuits.

关 键 词：大气中子 单粒子效应 地面辐射环境 能谱测量 

分 类 号：TL99[核科学技术—核技术及应用]