Salah Wa'el, del Rio M Sanchez, Hoorani H
Synchrotron-light for Experimental Science and Application in the Middle East (SESAME), P.O. Box 7, Allan 19252, Jordan.
Rev Sci Instrum. 2009 Sep;80(9):095106. doi: 10.1063/1.3213620.
The calculation for the optics of the synchrotron radiation small and wide angle x-ray scattering beamline, currently under construction at SESAME is described. This beamline is based on a cylindrically bent germanium (111) single crystal with an asymmetric cut of 10.5 degrees , followed by a 1.2 m long rhodium coated plane mirror bent into a cylindrical form. The focusing properties of bent asymmetrically cut crystals have not yet been studied in depth. The present paper is devoted to study of a particular application of a bent asymmetrically cut crystal using ray tracing simulations with the SHADOW code. These simulations show that photon fluxes of order of 1.09x10(11) photons/s will be available at the experimental focus at 8.79 keV. The focused beam dimensions will be 2.2 mm horizontal full width at half maximum (FWHM) by 0.12 mm vertical (FWHM).
描述了正在SESAME建造的同步辐射小角和广角X射线散射光束线的光学计算。该光束线基于一块圆柱弯曲的锗（111）单晶，非对称切割角度为10.5度，随后是一块1.2米长、镀铑的平面镜，弯曲成圆柱形。非对称切割弯曲晶体的聚焦特性尚未得到深入研究。本文致力于使用SHADOW代码进行光线追迹模拟，研究非对称切割弯曲晶体的一种特殊应用。这些模拟表明，在8.79 keV的实验焦点处，光子通量将达到1.09×10¹¹光子/秒量级。聚焦光束尺寸在水平方向半高宽（FWHM）为2.2毫米，垂直方向（FWHM）为0.12毫米。
