11 December 1997 New fixed-exit double-crystal monochromator with one cooled crystal
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The performance of a fixed exit double crystal monochromator in terms of stability and reproducibility of the outgoing X- ray beam becomes the crucial point at modern synchrotron beamlines dealt with the high resolution X-ray optics. Due to the high heat load the monochromator crystals have to be cryogenically cooled. The cooling loop of the second crystal may have an impact on the performance of the monochromator. We therefore suggest to use a Si1-xGex single crystal as the first cooled crystal of the monochromator. With that the second crystal is held at room temperature. To verify the proposed solution an experiment was performed where the lattice parameters of pure Si and SiGe crystals as a function of temperature were measured.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexei Souvorov, Alexei Souvorov, Nikolai V. Abrosimov, Nikolai V. Abrosimov, Michael Drakopoulos, Michael Drakopoulos, Alexei I. Erko, Alexei I. Erko, Wolfgang Gudat, Wolfgang Gudat, Andreas K. Freund, Andreas K. Freund, S. Rassolenko, S. Rassolenko, W. Schroeder, W. Schroeder, Irina Snigireva, Irina Snigireva, Anatoly A. Snigirev, Anatoly A. Snigirev, } "New fixed-exit double-crystal monochromator with one cooled crystal", Proc. SPIE 3151, High Heat Flux and Synchrotron Radiation Beamlines, (11 December 1997); doi: 10.1117/12.294493; https://doi.org/10.1117/12.294493

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