中国散裂中子源反角白光中子源准直器的设计与测试  

Design and Test of Collimator for Back-streaming White Neutron Source for CSNS

作　　者：于永积 敬罕涛 宁常军[1,2] 何泳成 王鹏程 唐靖宇[1,2] 康玲 阮锡超[3] 任杰 YU Yongji;JING Hantao;NING Changjun;HE Yongcheng;WANG Pengcheng;TANG Jingyu;KANG Ling;RUAN Xichao;REN Jie(Dongguan Neutron Science Center,Dongguan 523803,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Nuclear Data,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]东莞中子科学中心,广东东莞523803 [2]中国科学院高能物理研究所,北京100049 [3]中国原子能科学研究院核数据重点实验室,北京102413

出　　处：《原子能科学技术》2019年第12期2447-2453,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(10975150);国家重点研发计划资助项目(2016YFA0401601)

摘　　要：为获得核数据测量所需的束斑形状及较低的实验本底,反角白光中子源需通过准直器对束流进行刮束准直。以中子开关为例,根据相关要求确定了整体的设计方案。通过将挡块一分为二的设计,解决了小直径深孔加工的难题。利用有限元分析软件,优化了真空盒的外形结构及密封方式。针对挡块的工作环境,搭建了可用于真空的高精度耐辐射移动平台。经测试,中子开关的主要技术指标均满足要求,说明设计合理。In order to provide required beam shape and lower experimental background for nuclear data measurement,the beam of back-streaming white neutron source should be collimated by collimator.Taking the shutter as an example,the overall design scheme was determined according to the relevant requirements.The problem of processing small diameter deep hole was solved by dividing the block into two parts.The contour and sealing system of the vacuum chamber were optimized by using the finite element analysis software.A high-precision radiation-resistant mobile platform was built,which can meet the requirements of high vacuum.After testing,the main technical indicators of the shutter meet the design requirements,and it shows that the design is reasonable.

关 键 词：中国散裂中子源 反角白光中子源 白光中子束流 准直器 

分 类 号：TL503[核科学技术—核技术及应用]