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Title: Small-angle scattering of polychromatic X-rays: effects of bandwidth, spectral shape and high harmonics

Abstract

Polychromatic X-ray sources can be useful for photon-starved small-angle X-ray scattering given their high spectral fluxes. Their bandwidths, however, are 10–100 times larger than those using monochromators. To explore the feasibility, ideal scattering curves of homogeneous spherical particles for polychromatic X-rays are calculated and analyzed using the Guinier approach, maximum entropy and regularization methods. Monodisperse and polydisperse systems are explored. The influence of bandwidth and asymmetric spectra shape are exploredviaGaussian and half-Gaussian spectra. Synchrotron undulator spectra represented by two undulator sources of the Advanced Photon Source are examined as an example, as regards the influence of asymmetric harmonic shape, fundamental harmonic bandwidth and high harmonics. The effects of bandwidth, spectral shape and high harmonics on particle size determination are evaluated quantitatively.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1424767
Resource Type:
Journal Article
Journal Name:
Journal of Synchrotron Radiation (Online)
Additional Journal Information:
Journal Volume: 25; Journal Issue: 2; Journal ID: ISSN 1600-5775
Publisher:
International Union of Crystallography
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Chen, Sen, and Luo, Sheng-Nian. Small-angle scattering of polychromatic X-rays: effects of bandwidth, spectral shape and high harmonics. United States: N. p., 2018. Web. doi:10.1107/S1600577517018355.
Chen, Sen, & Luo, Sheng-Nian. Small-angle scattering of polychromatic X-rays: effects of bandwidth, spectral shape and high harmonics. United States. doi:10.1107/S1600577517018355.
Chen, Sen, and Luo, Sheng-Nian. Fri . "Small-angle scattering of polychromatic X-rays: effects of bandwidth, spectral shape and high harmonics". United States. doi:10.1107/S1600577517018355.
@article{osti_1424767,
title = {Small-angle scattering of polychromatic X-rays: effects of bandwidth, spectral shape and high harmonics},
author = {Chen, Sen and Luo, Sheng-Nian},
abstractNote = {Polychromatic X-ray sources can be useful for photon-starved small-angle X-ray scattering given their high spectral fluxes. Their bandwidths, however, are 10–100 times larger than those using monochromators. To explore the feasibility, ideal scattering curves of homogeneous spherical particles for polychromatic X-rays are calculated and analyzed using the Guinier approach, maximum entropy and regularization methods. Monodisperse and polydisperse systems are explored. The influence of bandwidth and asymmetric spectra shape are exploredviaGaussian and half-Gaussian spectra. Synchrotron undulator spectra represented by two undulator sources of the Advanced Photon Source are examined as an example, as regards the influence of asymmetric harmonic shape, fundamental harmonic bandwidth and high harmonics. The effects of bandwidth, spectral shape and high harmonics on particle size determination are evaluated quantitatively.},
doi = {10.1107/S1600577517018355},
journal = {Journal of Synchrotron Radiation (Online)},
issn = {1600-5775},
number = 2,
volume = 25,
place = {United States},
year = {2018},
month = {2}
}