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Measurement of the coherent beam properties at the CoSAXS beamline

Kahnt, Maik LU orcid ; Klementiev, Konstantin LU ; Haghighat, Vahid LU ; Weninger, Clemens LU ; Plivelic, Tomás S. LU ; Terry, Ann E. LU and Björling, Alexander LU (2021) In Journal of Synchrotron Radiation 28. p.1948-1953
Abstract

The CoSAXS beamline at the MAX IV Laboratory is a modern multi-purpose (coherent) small-Angle X-ray scattering (CoSAXS) instrument, designed to provide intense and optionally coherent illumination at the sample position, enabling coherent imaging and speckle contrast techniques. X-ray tracing simulations used to design the beamline optics have predicted a total photon flux of 1012-1013 photons s-1 and a degree of coherence of up to 10% at 7.1 keV. The normalized degree of coherence and the coherent flux of this instrument were experimentally determined using the separability of a ptychographic reconstruction into multiple mutually incoherent modes and thus the Coherence in the name CoSAXS was verified. How the beamline can be used both... (More)

The CoSAXS beamline at the MAX IV Laboratory is a modern multi-purpose (coherent) small-Angle X-ray scattering (CoSAXS) instrument, designed to provide intense and optionally coherent illumination at the sample position, enabling coherent imaging and speckle contrast techniques. X-ray tracing simulations used to design the beamline optics have predicted a total photon flux of 1012-1013 photons s-1 and a degree of coherence of up to 10% at 7.1 keV. The normalized degree of coherence and the coherent flux of this instrument were experimentally determined using the separability of a ptychographic reconstruction into multiple mutually incoherent modes and thus the Coherence in the name CoSAXS was verified. How the beamline can be used both for coherent imaging and XPCS measurements, which both heavily rely on the degree of coherence of the beam, was demonstrated. These results are the first experimental quantification of coherence properties in a SAXS instrument at a fourth-generation synchrotron light source.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
coherence, ptychography, SAXS, XPCS
in
Journal of Synchrotron Radiation
volume
28
pages
6 pages
publisher
International Union of Crystallography
external identifiers
  • pmid:34738950
  • scopus:85118878542
ISSN
0909-0495
DOI
10.1107/S1600577521009140
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 International Union of Crystallography. All rights reserved.
id
c1f74902-8b93-495b-9264-aaa6c5f81e09
date added to LUP
2021-11-19 15:47:00
date last changed
2025-01-26 19:50:24
@article{c1f74902-8b93-495b-9264-aaa6c5f81e09,
  abstract     = {{<p>The CoSAXS beamline at the MAX IV Laboratory is a modern multi-purpose (coherent) small-Angle X-ray scattering (CoSAXS) instrument, designed to provide intense and optionally coherent illumination at the sample position, enabling coherent imaging and speckle contrast techniques. X-ray tracing simulations used to design the beamline optics have predicted a total photon flux of 1012-1013 photons s-1 and a degree of coherence of up to 10% at 7.1 keV. The normalized degree of coherence and the coherent flux of this instrument were experimentally determined using the separability of a ptychographic reconstruction into multiple mutually incoherent modes and thus the Coherence in the name CoSAXS was verified. How the beamline can be used both for coherent imaging and XPCS measurements, which both heavily rely on the degree of coherence of the beam, was demonstrated. These results are the first experimental quantification of coherence properties in a SAXS instrument at a fourth-generation synchrotron light source. </p>}},
  author       = {{Kahnt, Maik and Klementiev, Konstantin and Haghighat, Vahid and Weninger, Clemens and Plivelic, Tomás S. and Terry, Ann E. and Björling, Alexander}},
  issn         = {{0909-0495}},
  keywords     = {{coherence; ptychography; SAXS; XPCS}},
  language     = {{eng}},
  month        = {{11}},
  pages        = {{1948--1953}},
  publisher    = {{International Union of Crystallography}},
  series       = {{Journal of Synchrotron Radiation}},
  title        = {{Measurement of the coherent beam properties at the CoSAXS beamline}},
  url          = {{http://dx.doi.org/10.1107/S1600577521009140}},
  doi          = {{10.1107/S1600577521009140}},
  volume       = {{28}},
  year         = {{2021}},
}