Application of polycapillary x ray lens to eliminate both the effect of x ray source size and scatter of the sample in laboratory tomography

作     者：孙学鹏 刘志国 孙天希 易龙涛 孙蔚渊 李坊佐 姜博文 马永忠 丁训良 

作者机构：The Key Laboratory of Beam Technology and Materials Modification of the Ministry of EducationBeijing Normal University College of Nuclear Science and Technology Beijing Normal University Beijing Radiation Center Center for Disease Control and Prevention of Beijing 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2015年第13卷第9期

页      面：92-96页

核心收录：

学科分类：0808[工学-电气工程] 070207[理学-光学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(No.11375027) the Fundamental Research Funds for the Central Universities(No.2014k JJCA03) 

主　　题：Electron sources Optical instrument lenses Tomography X ray optics 

摘      要：A tomography device based on a conventional laboratory x ray source, polycapillary parallel x ray lens （PPXRL）, and polycapillary collimating x ray lens （PCXRL） is designed. The PPXRL can collect the divergent x ray beam from the source and focus it into a quasi-parallel x ray beam with a divergence of 4.7 rarad. In the center of quasi-parallel x ray beam, there is a plateau region with an average gain in power density of 13.8 and a diameter of 630μm. The contrast of the image can be improved from 28.9% to 56.0% after adding the PCXRL between the sample and the detector.