基于北京大学4.5 MV静电加速器的核技术应用  

Nuclear Technology Application of the 4.5 MV Electrostatic Accelerator at Peking University

作　　者：高原[1] 杨向军[1] 王建勇[1] GAO Yuan;YANG Xiangjun;WANG Jianyong(School of Physics,State Key Laboratory of Nuclear Physics and Technology,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：《原子核物理评论》2020年第1期64-73,共10页Nuclear Physics Review

摘　　要：北京大学4.5 MV静电加速器是20世纪80年代我国自主研发的静电加速器。该器端电压在0.7~3.8 MV连续可调,主要加速氢/氦同位素离子,并可通过打靶产生准单能直流/脉冲中子场,具有多条束线及多个实验终端。该器作为开放仪器多年来为国内外从事核技术研究的团队提供了实验平台。近年来,针对我国在能源、航天和国防等领域材料研究的重要需求,该器进行了多次升级改造。一方面通过产生7 MeV以下和14~19 MeV的准单能中子场,应用于(n, a)核反应截面的测量和聚变堆中子谱仪刻度;另一方面,通过温控辐照、核反应分析等实验终端,实现了材料辐照损伤及聚变堆材料元素定量分析等研究方向的功能拓展。此外,设计新增用于半导体材料电学性能测试的原位在线辐照终端和用于研究材料微观尺度元素分布的离子束综合分析实验终端。目前部分新终端已设计组装完成,相关搭建和调试工作正在进行中。The 4.5 MV electrostatic accelerator of Peking University was designed and constructed independently by China in 1 980 s. By this accelerator, in which some beam lines and terminals are installed, the isotope ions of hydrogen or helium can be produced in the energy range of 0.7~3.8 MeV, and continuous or pulsed quasi-monoenergetic neutron fields can be generated by ion beam bombarding target. This facility has provided an open experimental platform for domestic and oversea nuclear technology research groups for many years. In recent years, in order to meet the demand of material research in the fields of energy, aerospace and national defense in China, some upgrading works have been achieved. On the one hand, quasi-monoenergetic neutron fields(<7 MeV, 14~19 MeV)generated by this facility have applied to cross section measurement of(n, a) nuclear reaction and fusion neutron spectrometer calibration. On the other hand, the temperature controlling irradiation, nuclear reaction analysis and other experimental terminals have been installed to develop the function on nuclear materials irradiation damage,quantitative analysis of fusion materials, and so on. In addition, an in situ irradiation terminal for testing the electrical properties of semiconductor materials and an integrated ion beam analysis experimental terminal for studying the distribution of elements at the micro scale are designed. At present, the new terminals have been designed and assembled, and the installation and testing work are in process.

关 键 词：静电加速器 中子场 材料辐照 离子束分析 原位测试 

分 类 号：TL52[核科学技术—核技术及应用]