Effects of beam divergence and polychromaticity on small angle x-ray scattering measurements with laser plasma sources

We explore the feasibility of small angle x-ray scattering (SAXS) measurements with intense laser-induced plasma sources. Such x-ray sources are inherently polychromatic and divergent. We simulate SAXS patterns using monochromatic and polychromatic x-ray sources with different divergences of polydis...

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Bibliographic Details
Published in:AIP advances 2022-02, Vol.12 (2), p.025301-025301-9
Main Authors: Deng, Y. J., Zhang, Y. Y., Cao, Zhurong, Chen, S., Luo, S. N.
Format: Article
Language:English
Subjects:
Feasibility
Laser plasmas
Lasers
Least squares method
Pinholes
Small angle X ray scattering
X ray sources
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Summary:We explore the feasibility of small angle x-ray scattering (SAXS) measurements with intense laser-induced plasma sources. Such x-ray sources are inherently polychromatic and divergent. We simulate SAXS patterns using monochromatic and polychromatic x-ray sources with different divergences of polydisperse particle systems with different size distributions. The beam divergence is adjusted via varying x-ray source size, pinhole size, and the source-to-pinhole distance. Three typical laser plasma He-α sources (Fe, Cu, and Ge) are considered. The scattering curves are analyzed using the modified Guinier approach and the total non-negative least squares method. We demonstrate certain feasibility of SAXS measurements using laser plasma sources with a finite size, without a monochromator and additional software desmearing.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0077965