北京大学4.5 MV静电加速器核反应分析系统  

Nuclear Reaction Analysis System of 4.5 MV Electrostatic Accelerator at Peking University

作　　者：高原[1] 朱吉鹏[1] 秦利青 肖璇[1] 王宇钢[1] 颜莎[1] GAO Yuan;ZHU Jipeng;QIN Liqing;XIAO Xuan;WANG Yugang;YAN Sha(State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]北京大学物理学院核物理与核技术国家重点实验室,北京100871

出　　处：《原子能科学技术》2019年第5期906-912,共7页Atomic Energy Science and Technology

基　　金：国家磁约束核聚变专项资助项目(2013GB109004);国家自然科学基金资助项目(11305005)

摘　　要：为满足对聚变堆面向等离子体材料中氘氚滞留问题的研究,北京大学4.5 MV静电加速器在原束线基础上新增核反应分析系统,该系统使用能量0.8～3.6 MeV的H^+、D^+、~3He^+和~4He^+粒子束流,可对核反应微分截面和样品中元素浓度的深度分布进行测量分析。本文对核反应分析原理、核反应分析系统的设备布局和实验方法进行了讨论,并以D(~3He,p)~4He核反应为例,分析了微分截面计算和样品中氘元素浓度深度分布的数据结果,其深度分辨小于1.5μm,实验误差约为7.5%。In order to satisfy the research of the deuterium and tritium retention in plasma facing components of fusion reactor,a nuclear reaction analysis system was designed and installed based on the original beam line of 4.5 MV electrostatic accelerator at Peking University.With this nuclear reaction analysis system,H+,D+,3He+ and 4He+ beams can be provided in the ion energy range from 0.8 MeV to 3.6 MeV.The differential cross section of the nuclear reaction and the depth distribution of the element concentration in samples can be achieved by this system.The principle of nuclear reaction analysis,the equipment layout and the experiment method were discussed,and the data analysis results of D(3He,p)4He nuclear reaction were shown as application examples of this system.In addition,the depth resolution of less than 1.5 μm and the experimental error of 7.5% were achieved with this system.

关 键 词：静电加速器 核反应分析 微分截面 元素浓度深度分布 

分 类 号：TL52[核科学技术—核技术及应用]