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Proceedings Paper

Modeling of heat-bump formation in x-ray optics under SR beams
Author(s): Peter Revesz; Alexander Kazimirov; James J. Savino; Christopher J. MacGahan; Emmett L. Windisch
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Paper Abstract

We have used a direct optical measurement of the distortion of the first silicon crystal of the CHESS A2 monochromator. The total X-ray power absorbed by the crystal was in the range of 2 to 190 Watts. The X-ray powers measured by a bolometer were in good agreement with the XOP calculations. In-situ optical measurements were used to measure the deformation of the crystal under the heat load between a 3-15° angle of incidence. Simultaneously, ANSYS modeling of the effect of the heat load on the monochromator crystal with the cooling assembly was done. The measured slope error and the surface deformation profiles were in good agreement with the ANSYS simulations. A rocking curve method was used to measure the effect of a heat load on the diffraction properties of the monochromator for a range of beam-defining slit widths. We have found a good correlation between the FWHM of the rocking curves and the slope errors from the optical measurements.

Paper Details

Date Published: 4 September 2009
PDF: 9 pages
Proc. SPIE 7448, Advances in X-Ray/EUV Optics and Components IV, 744805 (4 September 2009); doi: 10.1117/12.826394
Show Author Affiliations
Peter Revesz, Cornell Univ. (United States)
Alexander Kazimirov, Cornell Univ. (United States)
James J. Savino, Cornell Univ. (United States)
Christopher J. MacGahan, Cornell Univ. (United States)
Emmett L. Windisch, Wayne State Univ. (United States)

Published in SPIE Proceedings Vol. 7448:
Advances in X-Ray/EUV Optics and Components IV
Ali M. Khounsary; Christian Morawe; Shunji Goto, Editor(s)

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