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arXiv · 1401.5879

All-diamond optical assemblies for a beam-multiplexing X-ray monochromator at the Linac Coherent Light Source

S. Stoupin·S. A. Terentyev·V. D. Blank·Yu. V. Shvyd'ko·K. Goetze·L. Assoufid·S. N. Polyakov·M. S. Kuznetsov·N. V. Kornilov·J. Katsoudas·R. Alonso-Mori·M. Chollet·Y. Feng·J. M. Glownia·H. Lemke·A. Robert·S. Song·M. Sikorski·D. Zhu
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Abstract

A double-crystal diamond (111) monochromator recently implemented at the Linac Coherent Light Source (LCLS) enables splitting of the primary X-ray beam into a pink (transmitted) and a monochromatic (reflected) branch. The first monochromator crystal with a thickness of 100 um provides sufficient X-ray transmittance to enable simultaneous operation of two beamlines. Here we report on the design, fabrication, and X-ray characterization of the first and second (300-um-thick) crystals utilized in the monochromator and the optical assemblies holding these crystals. Each crystal plate has a region of about 5 X 2 mm2 with low defect concentration, sufficient for use in X-ray optics at the LCLS. The optical assemblies holding the crystals were designed to provide mounting on a rigid substrate and to minimize mounting-induced crystal strain. The induced strain was evaluated using double-crystal X-ray topography and was found to be small over the 5 X 2 mm2 working regions of the crystals.

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S. Stoupin, S. A. Terentyev, V. D. Blank, Yu. V. Shvyd'ko, K. Goetze, L. Assoufid, S. N. Polyakov, M. S. Kuznetsov, N. V. Kornilov, J. Katsoudas, R. Alonso-Mori, M. Chollet, Y. Feng, J. M. Glownia, H. Lemke, A. Robert, S. Song, M. Sikorski, D. Zhu. 2014-01-23. All-diamond optical assemblies for a beam-multiplexing X-ray monochromator at the Linac Coherent Light Source. https://arxiv.org/abs/1401.5879

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