New fixed-exit double-crystal monochromator with one cooled crystal

Alexei Souvorov; Nikolai V. Abrosimov; Michael Drakopoulos; Alexei I. Erko; Wolfgang Gudat; Andreas K. Freund; S. Rassolenko; W. Schroeder; Irina Snigireva; Anatoly A. Snigirev

doi:10.1117/12.294493

11 December 1997 New fixed-exit double-crystal monochromator with one cooled crystal

Alexei Souvorov, Nikolai V. Abrosimov, Michael Drakopoulos, Alexei I. Erko, Wolfgang Gudat, Andreas K. Freund, S. Rassolenko, W. Schroeder, Irina Snigireva, Anatoly A. Snigirev

Author Affiliations +

Proceedings Volume 3151, High Heat Flux and Synchrotron Radiation Beamlines; (1997) https://doi.org/10.1117/12.294493
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

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 Si_1-xGe_x 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.

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Alexei Souvorov, Nikolai V. Abrosimov, Michael Drakopoulos, Alexei I. Erko, Wolfgang Gudat, Andreas K. Freund, S. Rassolenko, W. Schroeder, Irina Snigireva, and 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); https://doi.org/10.1117/12.294493

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