Hard X-ray diffraction enhanced imaging only using two crystals  

作　　者：LIGang WANGNan WUZiyu 

机构地区：[1]BeijingSynchrotronRadiationFacility.InstituteofHighEnergyPhysics.ChineseAcademyofSciences.Beijing100039.China [2]CollegeofMachine-electronics.BeijingIndustryUniversity.Beijing100022.China

出　　处：《Chinese Science Bulletin》2004年第20期2120-2125,共6页

摘　　要：Different configurations for the monochroma-tor crystals and the analyzer crystals have been used in hard X-ray diffraction enhanced imaging (DEI) methods to over-come the complex task to adjust each of them to the ideal position. Here we present a very compact DEI configuration, and preliminary results of experiments performed at the Beijing Synchrotron Radiation Facility (BSRF) using only two crystals: the first one acting as monochromator and the second one as analyzer in the Bragg geometry. Refraction contrast images characterized by high contrast and spatial resolution are obtained and compared with absorption im-ages. Differences among these images will be outlined and discussed emphasizing the potential capabilities of this very simple layout that guarantees a high transmission efficiency.Different configurations for the monochroma-tor crystals and the analyzer crystals have been used in hard X-ray diffraction enhanced imaging (DEI) methods to over-come the complex task to adjust each of them to the ideal position. Here we present a very compact DEI configuration, and preliminary results of experiments performed at the Beijing Synchrotron Radiation Facility (BSRF) using only two crystals: the first one acting as monochromator and the second one as analyzer in the Bragg geometry. Refraction contrast images characterized by high contrast and spatial resolution are obtained and compared with absorption im-ages. Differences among these images will be outlined and discussed emphasizing the potential capabilities of this very simple layout that guarantees a high transmission efficiency.

关 键 词：强X-射线衍射图像增强 晶体分析 摇摆曲线 同步加速器辐射 晶体单色器 

分 类 号：O723[理学—晶体学]