%0 Journal Article
%T Application of Single and Dual Multilayer Optics for Powder X-Ray Diffraction
%A Scott T. Misture
%J X-Ray Optics and Instrumentation
%D 2008
%I 
%R 10.1155/2008/408702
%X The performance of parallel beam multilayer optics, including a parabolic multilayer Osmic MaxFlux GO-13N and a flat custom multilayer, was evaluated experimentally and compared to Bragg-Brentano and traditional  бщ ?   бщ ?  parallel beam бщ ?   бщ ?   or  бщ ?   бщ ?  thin film бщ ?   бщ ?   optical geometries. A novel arrangement of a parabolic multilayer in the incident beam with a flat multilayer in the diffracted beam functioning as an analyzer crystal was proven effective for powder diffraction applications. The dual-optic configuration improves resolution while eliminating sample displacement and transparency errors as expected for a configuration with equatorial divergence below 100 arcseconds. Fundamental parameters fitting showed that the parabolic multilayer can be accurately modeled using a constant Gaussian function, while a long parallel-plate soller collimator requires a constant hat function. No additional convolutions are necessary for the diffracted-beam flat multilayer because of the lower acceptance angle.
%U http://dx.doi.org/10.1155/2008/408702