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At-wavelength characterization of X-ray wavefronts in Bragg diffraction from crystals

Journal Article · · Journal of Synchrotron Radiation (Online)

The advent of next-generation synchrotron radiation sources and X-ray free-electron lasers calls for high-quality Bragg-diffraction crystal optics to preserve the X-ray beam coherence and wavefront. This requirement brings new challenges in characterizing crystals in Bragg diffraction in terms of Bragg-plane height errors and wavefront phase distortions. Here, a quantitative methodology to characterize crystal optics using a state-of-the-art at-wavelength wavefront sensing technique and statistical analysis is proposed. The method was tested at the 1-BM-B optics testing beamline at the Advanced Photon Source for measuring silicon and diamond crystals in a self-referencing single-crystal mode and an absolute double-crystal mode. The phase error sensitivity of the technique is demonstrated to be at the λ/100 level required by most applications, such as the characterization of diamond crystals for cavity-based X-ray free-electron lasers.

Sponsoring Organization:
USDOE
Grant/Contract Number:
NONE; AC02-06CH11357
OSTI ID:
2008382
Alternate ID(s):
OSTI ID: 2469513
Journal Information:
Journal of Synchrotron Radiation (Online), Journal Name: Journal of Synchrotron Radiation (Online) Journal Issue: 6 Vol. 30; ISSN 1600-5775; ISSN JSYRES
Publisher:
International Union of Crystallography (IUCr)Copyright Statement
Country of Publication:
Denmark
Language:
English

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