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Proceedings Paper

Laterally graded Si1-xGex crystals for high-resolution synchrotron x-ray optics
Author(s): Alexei I. Erko; Franz Schaefers; Wolfgang Gudat; K. J. Sawhney; Nikolai V. Abrosimov; S. N. Rossolenko; V. Alex; S. Groth; W. Schroeder
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Paper Abstract

We present first experimental data on a novel type of optical element for synchrotron radiation applications in the x-ray region: namely laterally-graded aperiodic crystals on the basis of Si1-xGex alloys. The lattice parameter of such a gradient crystal containing up to some atomic % Ge in a Si single crystal changes nearly linearly along the plate of diffraction. Thus the variation of the Bragg angle of divergent incident light on the crystal can be compensated for. This opens up the possibility to operate a crystal monochromator in nearly crystal limited resolution in the whole energy range above 2 keV at the full vertical divergence without a collimating premirror. Simultaneously the reflected spectral intensity can be increased considerably as compared with a conventional Si-crystal monochromator.

Paper Details

Date Published: 22 November 1996
PDF: 10 pages
Proc. SPIE 2856, Optics for High-Brightness Synchrotron Radiation Beamlines II, (22 November 1996); doi: 10.1117/12.259855
Show Author Affiliations
Alexei I. Erko, Berliner Elektronenspeicherring Gesellschaft fuer Synchrotronstrahlung GmbH (Germany)
Franz Schaefers, Berliner Elektronenspeicherring Gesellschaft fuer Synchrotronstrahlung GmbH (Germany)
Wolfgang Gudat, Berliner Elektronenspeicherring Gesellschaft fuer Synchrotronstrahlung GmbH (Germany)
K. J. Sawhney, Berliner Elektronenspeicherring Gesellschaft fuer Synchrotronstrahlung GmbH (Germany)
Nikolai V. Abrosimov, Institute of Solid State Physics (Germany)
S. N. Rossolenko, Institute of Solid State Physics (Russia)
V. Alex, Institut fuer Kristallzuechtung (Germany)
S. Groth, Institut fuer Kristallzuechtung (Germany)
W. Schroeder, Institut fuer Kristallzuechtung (Germany)


Published in SPIE Proceedings Vol. 2856:
Optics for High-Brightness Synchrotron Radiation Beamlines II
Lonny E. Berman; John Arthur, Editor(s)

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