两块晶体衍射增强成像方法研究  

Study on the methods for diffraction-enhanced imaging with two crystals

作　　者：朱佩平[1] 王寯越[1] 袁清习[1] 田玉莲[1] 黄万霞[1] 黎刚[1] 胡天斗[1] 姜晓明[1] 吴自玉[1] 

机构地区：[1]中国科学院高能物理研究所,北京100039

出　　处：《物理学报》2005年第1期58-63,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号 :10 490 194);中国科学院高能物理研究所科技创新经费资助的课题~~

摘　　要：在北京同步辐射装置 4W1A光束线形貌学实验站用两块晶体开展了衍射增强成像方法的实验和理论研究 .研究了晶体热膨胀对两块晶体衍射增强成像的影响 ,分析的结论表明 ,晶体转轴垂直于同步辐射偏振面能基本避免晶体热膨胀的影响 ,获得较好的成像质量 .实验结果证实了分析的正确性 .Diffraction-enhanced imaging by using two crystals has been recently developed in x-ray topogrphy station in Beijing Synchrotron Radiation Facility. In this article the analysis for the. influence of the thermal expansion of the first crystal on the diffraction enhanced imaging is presented. The conclusion is that the influence of the thermal expansion of the first crystal can be avoided and much better images can be obtained when the axes of crystals are placed vertically to the polarization plane of the synchrotron radiation. The experimental results confirmed this analysis.

关 键 词：成像方法 影响 晶体衍射 分析 实验结果 研究 增强 北京同步辐射装置 偏振 光束线 

分 类 号：O734[理学—晶体学]