摘要
高能X射线微焦斑在高能微束X射线分析技术中具有重要应用。为了获得高能X射线微焦斑透镜,理论设计了基于锥形单毛细管的高能X射线微焦斑透镜,该类锥形毛细管透镜可以把能量为100 keV的X射线会聚成微焦斑,焦斑直径和功率密度增益分别在微米和几十量级,对应的焦距为5毫米左右;并且理论模拟了该类锥形毛细管透镜采用玻璃反射面和金属(纯金)反射面后的特性,在透镜焦斑处,采用纯金金属反射面的锥形毛细管透镜的光通量为采用普通硅酸盐玻璃反射面的锥形毛细管透镜的14.8倍。模拟结果对锥形单毛细管X射线透镜的研制和应用具有指导意义。
A high-energy X-ray microfocal spot has an important application in high-energy microbeam X-ray analysis.To obtain a high-energy X-ray lens with a microfocal spot,a tapered monocapillary lens was designed in theory.This lens can focus X-ray with an energy of 100 keV onto a micron-scale focal spot with a gain in the focal spot diameter and power density of the order of microns and tens,respectively,and the corresponding focal length is~5 mm.Furthermore,the characteristics of the lens with a glass and a gold reflecting surface were simulated in theory,respectively.The flux in the focal spot of this X-ray lens with a gold reflecting surface is 14.8 times that with a borosilicate glass surface.The simulation results are helpful in the fabrication and application of such tapered monocapillary X-ray lens.
作者
李惠泉
邵尚坤
孙学鹏
袁天语
华陆
孙天希
Li Huiquan;Shao Shangkun;Sun Xuepeng;Yuan Tianyu;Hua Lu;Sun Tianxi(Key Laboratory of Beam Technology,Ministry of Education,College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China;Institute of Radiation Technology,Beijing Academy of Science and Technology,Beijing 100875,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2022年第11期234-240,共7页
Acta Optica Sinica
基金
国家重点研发计划(2021YFF0701202)
国家自然科学基金(11875087)
北京师范大学博一学科交叉基金(BNUXKJC2121)。
