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27 August 2010 Improved synchrotron performance from indium antimonide crystals
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The soft x-ray micro-characterization beamline (SXRMB) has recently undergone commissioning at the Canadian Light Source. SXRMB is a synchrotron bending magnet based design that covers a photon energy range of 1.7-10 keV, using a double-crystal monochromator that employs two crystal pairs - InSb-111 and Si-111. The indium antimonide crystals are typically used over the photon energy sub-range of 1.7-4 keV, to cover the K-edges of many important elements, including Si, P, S, Cl, and Ca. The performance of the InSb-111 crystal pair has proven problematic, requiring several iterations to improve the photon flux performance to an acceptable level. Thermal distortions for indium antimonide are considerable even at power levels below 50 W, since it suffers from poor thermal conductivity and a large linear thermal expansion coefficient. Finite element analysis results for different crystal thicknesses will be presented. Improvements to the crystal cage holders and cooling, as well as metrological improvements to properly mount the crystals will also be discussed.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brian Yates, Yongfeng Hu, and Vinay Nagarkal "Improved synchrotron performance from indium antimonide crystals", Proc. SPIE 7802, Advances in X-Ray/EUV Optics and Components V, 78020U (27 August 2010);

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