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Multilayer X-ray optics at CHESS

Almost half of the X‐ray beamlines at the Cornell High Energy Synchrotron Source (CHESS) are based on multilayer optics. `Traditional' multilayers with an energy resolution of ΔE/E≃ 2% are routinely used to deliver X‐ray flux enhanced by a factor of 102 in comparison with standard Si(111) optic...

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Bibliographic Details
Published in:Journal of synchrotron radiation 2006-03, Vol.13 (2), p.204-210
Main Authors: Kazimirov, Alexander, Smilgies, Detlef-M., Shen, Qun, Xiao, Xianghui, Hao, Quan, Fontes, Ernest, Bilderback, Donald H., Gruner, Sol M., Platonov, Yuriy, Martynov, Vladimir V.
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Language:English
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Summary:Almost half of the X‐ray beamlines at the Cornell High Energy Synchrotron Source (CHESS) are based on multilayer optics. `Traditional' multilayers with an energy resolution of ΔE/E≃ 2% are routinely used to deliver X‐ray flux enhanced by a factor of 102 in comparison with standard Si(111) optics. Sagittal‐focusing multilayers with fixed radius provide an additional factor of 10 gain in flux density. High‐resolution multilayer optics with ΔE/E≃ 0.2% are now routinely used by MacCHESS crystallographers. New wide‐bandpass multilayers with ΔE/E = 5% and 10% have been designed and tested for potential applications in macromolecular crystallography. Small d‐spacing multilayers with d≤ 20 Å have been successfully used to extend the energy range of multilayer optics. Analysis of the main characteristics of the Mo/B4C and W/B4C small d‐spacing multilayer optics shows enhancement in their performance at higher energies. Chemical vapour deposited SiC, with a bulk thermal conductivity of a factor of two higher than that of silicon, has been successfully introduced as a substrate material for multilayer optics. Characteristics of different types of multilayer optics at CHESS beamlines and their applications in a variety of scattering, diffraction and imaging techniques are discussed.
ISSN:1600-5775
0909-0495
1600-5775
DOI:10.1107/S0909049506002846