Designing and commissioning of a prototype double Laue monochromator at CHESS

17th Pan-American Synchrotron Radiation Instrumentation Conference

Ko, J. Y. Peter^1 ; Oswald, Benjamin B.^1 ; Savino, James J.^1 ; Pauling, Alan K.^1 ; Lyndaker, Aaron^1 ; Revesz, Peter^1 ; Miller, Matthew P.^1,2 ; Brock, Joel D.^1,3

Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY 14853, United States^1

Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, United States^2

School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853, United States^3

关键词: Bending control;    Bragg crystals;    Experimental stations;    High energy X ray;    Laue monochromators;    Monochromator crystals;    Spring designs;    White beams;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/493/1/012006/pdf
DOI  :  10.1088/1742-6596/493/1/012006

来源: IOP

【 摘 要 】

High-energy X-rays are efficiently focused sagittally by a set of asymmetric Laue (transmission) crystals. We designed, built and commissioned a prototype double Laue monochromator ((111) reflection in Si(100)) optimized for high-energy X-rays (30-60 keV). Here, we report our design of novel prototype sagittal bender and highlight results from recent characterization experiments. The design of the bender combines the tuneable bending control afforded by previous leaf-spring designs with the stability and small size of a four-bar bender. The prototype monochromator focuses a 25 mm-wide white beam incident on the first monochromator crystal to a monochromatized 0.6 mm beam waist in the experimental station. Compared to the flux in the same focal spot with the Bragg crystal (without focusing), the prototype Laue monochromator delivered 85 times more at 30 keV.