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：Sun Xuepeng; Liu Zhiguo; Sun Tianxi^*; Yi Longtao; Sun Weiyuan; Li Fangzuo; Jiang Bowen; Ma Yongzhong; Ding Xunliang

来源：Chinese Optics Letters, 2015, 13(9): 093401.

DOI：10.3788/COL201513.093401

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 mrad. 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 630 mu m. The contrast of the image can be improved from 28.9% to 56.0% after adding the PCXRL between the sample and the detector.

• 出版日期2015-9-10
• 单位北京市辐射中心; 北京师范大学