原子能科学技术Issue(2)：234-239,6.DOI:10.7538/yzk.2015.49.02.0234
中子导管末端中子束角发散分布规律研究
Research on Angular Divergence Distribution of Neutron Beam at the End of Neutron Guide
摘要
Abstract
The theoretical formulae were deduced based on the principle of total reflec‐tion optical geometry ,and they can accurately depict the angular divergence distribution of any point at the end of the neutron guide .The theoretical formulae were verified by Monte Carlo simulation .The simulation results show that the angular divergence distri‐bution discontinuous nature will cause the inhomogeneous spatial distribution of the neutron intensity at the sample position ,even result in grid dark lines effect .Finally , according to the theory of analytic formula ,several effective methods were given ,which can reduce or eliminate the grid dark lines effect .关键词
中子导管/角发散/蒙特卡罗模拟/中子照相Key words
neutron guide/angular divergence/Monte Carlo simulation/neutron radio-g raphy分类
数理科学引用本文复制引用
王雨,王洪立,刘蕴韬,孙凯,魏国海,贺林峰,韩松柏,陈东风..中子导管末端中子束角发散分布规律研究[J].原子能科学技术,2015,(2):234-239,6.基金项目
973计划资助项目（2010CB833101）；国家自然科学基金资助项目（11375271）；中国原子能科学研究院院长基金-青年英才培育基金资助项目 （）
