General-purpose high-resolution double-channel-cut monochromator for use on the ChemMatCARS insertion-device beamline at the Advanced Photon Source

Timothy J. Graber; Susan M. Mini; P. James Viccaro

doi:10.1117/12.332513

11 December 1998 General-purpose high-resolution double-channel-cut monochromator for use on the ChemMatCARS insertion-device beamline at the Advanced Photon Source

Timothy J. Graber, Susan M. Mini, P. James Viccaro

Author Affiliations +

Proceedings Volume 3448, Crystal and Multilayer Optics; (1998) https://doi.org/10.1117/12.332513
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

The high-brilliance radiation provided by third-generation synchrotron x-ray facilities such as the Advanced Photon Source has greatly enhanced the power of such chemical and materials research techniques as x-ray-absorption spectroscopy, surface scattering, small-angle x-ray scattering, and chemical crystallography. In order to take full advantage of these source properties, we propose the development of a general-purpose high-energy-resolution double-channel-cut monochromator based on a similar device developed for nuclear-resonant-scattering techniques by the Experimental Facilities Division at the APS. The instrumentation will be installed at the APS on the ChemMatCARS insertion-device beamline at sector 15. It will be used primarily for valence-specific static and time-resolved chemical-crystallography experiments as well as anomalous- scattering experiments planned for surface diffraction and small-angle/wide-angle x-ray scattering. Two channel-cut crystals placed in a dispersive (-n, +n, +n, -n) geometry provide a fixed-offset beam with an energy resolution (Delta) E/E approximately 10^-5. Several sets of channel-cut-crystal pairs, designed to cover an energy range from 6 to 35 keV with a matching angular acceptance to the source, are used in conjunction with the beamline high- heat-load double-crystal monochromator.

Citation Download Citation

Timothy J. Graber, Susan M. Mini, and P. James Viccaro "General-purpose high-resolution double-channel-cut monochromator for use on the ChemMatCARS insertion-device beamline at the Advanced Photon Source", Proc. SPIE 3448, Crystal and Multilayer Optics, (11 December 1998); https://doi.org/10.1117/12.332513

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KEYWORDS

Crystals

Monochromators

Laser crystals

Scattering

X-rays

Silicon

Laser scattering

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