Canadian Light Source, 101 Perimeter Road, Saskatoon, Saskatchewan, Canada S7N 0X4.
J Synchrotron Radiat. 2012 Mar;19(Pt 2):185-90. doi: 10.1107/S0909049511052319. Epub 2012 Jan 7.
For X-ray absorption spectroscopy, either in transmission mode with concentrated samples or for dilute samples in fluorescence mode, it is advantageous to improve the signal-to-noise ratio by implementing a slit apparatus. Several investigations into the improvement of measurements when slits and filters are employed have been reported; however, these have always been for a particular design and are not transferable between dissimilar systems. A generalized approach to Soller slit design will be presented which enables a target level of noise rejection to be achieved by varying the number, size and placement of the filter and Soller slit assembly. A procedure for determining the reduction in efficiency of the Soller slits with respect to misalignment with the sample will also be discussed.
对于 X 射线吸收光谱学，无论是采用浓缩样品的透射模式还是采用荧光模式的稀释样品，通过实施狭缝装置来提高信噪比都是有利的。已经有几项关于在使用狭缝和滤波器时提高测量精度的研究报告；然而，这些研究始终是针对特定设计的，并且在不同系统之间不可转移。将提出一种广义的索勒狭缝设计方法，通过改变滤波器和索勒狭缝组件的数量、大小和位置来实现目标水平的噪声抑制。还将讨论确定索勒狭缝相对于样品的不对准导致的效率降低的程序。
