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A Monte Carlo ray-tracing simulation of coherent X-ray diffractive imaging

Fevola, Giovanni ; Knudsen, Erik Bergback ; Ramos, Tiago ; Carbone, Dina LU and Andreasen, Jens Wenzel (2020) In Journal of Synchrotron Radiation 27. p.134-145
Abstract

Coherent diffractive imaging (CDI) experiments are adequately simulated assuming the thin sample approximation and using a Fresnel or Fraunhofer wavefront propagator to obtain the diffraction pattern. Although this method is used in wave-based or hybrid X-ray simulators, here the applicability and effectiveness of an alternative approach that is based solely on ray tracing of Huygens wavelets are investigated. It is shown that diffraction fringes of a grating-like source are accurately predicted and that diffraction patterns of a ptychography dataset from an experiment with realistic parameters can be sampled well enough to be retrieved by a standard phase-retrieval algorithm. Potentials and limits of this approach are highlighted. It... (More)

Coherent diffractive imaging (CDI) experiments are adequately simulated assuming the thin sample approximation and using a Fresnel or Fraunhofer wavefront propagator to obtain the diffraction pattern. Although this method is used in wave-based or hybrid X-ray simulators, here the applicability and effectiveness of an alternative approach that is based solely on ray tracing of Huygens wavelets are investigated. It is shown that diffraction fringes of a grating-like source are accurately predicted and that diffraction patterns of a ptychography dataset from an experiment with realistic parameters can be sampled well enough to be retrieved by a standard phase-retrieval algorithm. Potentials and limits of this approach are highlighted. It is suggested that it could be applied to study imperfect or non-standard CDI configurations lacking a satisfactory theoretical formulation. The considerable computational effort required by this method is justified by the great flexibility provided for easy simulation of a large-parameter space.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
coherent diffractive imaging, Monte Carlo simulations, ptychography H2020 European Research Council 681881 Ministeriet for Forskning Innovation og Videregående Uddannelser 7005-000005B, ray tracing, X-ray microscopy
in
Journal of Synchrotron Radiation
volume
27
pages
12 pages
publisher
International Union of Crystallography
external identifiers
  • pmid:31868746
  • scopus:85077146270
ISSN
0909-0495
DOI
10.1107/S1600577519014425
language
English
LU publication?
yes
id
37f01ad3-d958-4191-a23b-b45fc502286c
date added to LUP
2020-01-10 11:53:37
date last changed
2021-03-03 05:17:37
@article{37f01ad3-d958-4191-a23b-b45fc502286c,
  abstract     = {<p>Coherent diffractive imaging (CDI) experiments are adequately simulated assuming the thin sample approximation and using a Fresnel or Fraunhofer wavefront propagator to obtain the diffraction pattern. Although this method is used in wave-based or hybrid X-ray simulators, here the applicability and effectiveness of an alternative approach that is based solely on ray tracing of Huygens wavelets are investigated. It is shown that diffraction fringes of a grating-like source are accurately predicted and that diffraction patterns of a ptychography dataset from an experiment with realistic parameters can be sampled well enough to be retrieved by a standard phase-retrieval algorithm. Potentials and limits of this approach are highlighted. It is suggested that it could be applied to study imperfect or non-standard CDI configurations lacking a satisfactory theoretical formulation. The considerable computational effort required by this method is justified by the great flexibility provided for easy simulation of a large-parameter space.</p>},
  author       = {Fevola, Giovanni and Knudsen, Erik Bergback and Ramos, Tiago and Carbone, Dina and Andreasen, Jens Wenzel},
  issn         = {0909-0495},
  language     = {eng},
  pages        = {134--145},
  publisher    = {International Union of Crystallography},
  series       = {Journal of Synchrotron Radiation},
  title        = {A Monte Carlo ray-tracing simulation of coherent X-ray diffractive imaging},
  url          = {http://dx.doi.org/10.1107/S1600577519014425},
  doi          = {10.1107/S1600577519014425},
  volume       = {27},
  year         = {2020},
}