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Proceedings Paper

New fixed-exit double-crystal monochromator with one cooled crystal
Author(s): Alexei Souvorov; Nikolai V. Abrosimov; Michael Drakopoulos; Alexei I. Erko; Wolfgang Gudat; Andreas K. Freund; S. Rassolenko; W. Schroeder; Irina Snigireva; Anatoly A. Snigirev
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Paper 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 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.

Paper Details

Date Published: 11 December 1997
PDF: 4 pages
Proc. SPIE 3151, High Heat Flux and Synchrotron Radiation Beamlines, (11 December 1997); doi: 10.1117/12.294493
Show Author Affiliations
Alexei Souvorov, European Synchrotron Radiation Facility (France)
Nikolai V. Abrosimov, Institute of Solid State Physics (Russia)
Michael Drakopoulos, European Synchrotron Radiation Facility (France)
Alexei I. Erko, BESSY GmbH (Germany)
Wolfgang Gudat, BESSY GmbH (Germany)
Andreas K. Freund, European Synchrotron Radiation Facility (France)
S. Rassolenko, Institute of Solid State Physics (Russia)
W. Schroeder, Institute of Crystal Growth (Germany)
Irina Snigireva, European Synchrotron Radiation Facility (France)
Anatoly A. Snigirev, European Synchrotron Radiation Facility (France)

Published in SPIE Proceedings Vol. 3151:
High Heat Flux and Synchrotron Radiation Beamlines
Albert T. Macrander; Ali M. Khounsary, Editor(s)

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