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The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography
A quantitative analysis of the effect of strain on phase retrieval in Bragg coherent X-ray diffraction imaging is reported. It is shown in reconstruction simulations that the phase maps of objects with strong step-like phase changes are more precisely retrieved than the corresponding modulus values....
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8284403/ https://www.ncbi.nlm.nih.gov/pubmed/34212879 http://dx.doi.org/10.1107/S160057752100477X |
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author | Kim, Chan Scholz, Markus Madsen, Anders |
author_facet | Kim, Chan Scholz, Markus Madsen, Anders |
author_sort | Kim, Chan |
collection | PubMed |
description | A quantitative analysis of the effect of strain on phase retrieval in Bragg coherent X-ray diffraction imaging is reported. It is shown in reconstruction simulations that the phase maps of objects with strong step-like phase changes are more precisely retrieved than the corresponding modulus values. The simulations suggest that the reconstruction precision for both phase and modulus can be improved by employing a modulus homogenization (MH) constraint. This approach was tested on experimental data from a highly strained Fe–Al crystal which also features antiphase domain boundaries yielding characteristic π phase shifts of the (001) superlattice reflection. The impact of MH is significant and this study outlines a successful method towards imaging of strong phase objects using the next generation of coherent X-ray sources, including X-ray free-electron lasers. |
format | Online Article Text |
id | pubmed-8284403 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-82844032021-08-02 The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography Kim, Chan Scholz, Markus Madsen, Anders J Synchrotron Radiat Research Papers A quantitative analysis of the effect of strain on phase retrieval in Bragg coherent X-ray diffraction imaging is reported. It is shown in reconstruction simulations that the phase maps of objects with strong step-like phase changes are more precisely retrieved than the corresponding modulus values. The simulations suggest that the reconstruction precision for both phase and modulus can be improved by employing a modulus homogenization (MH) constraint. This approach was tested on experimental data from a highly strained Fe–Al crystal which also features antiphase domain boundaries yielding characteristic π phase shifts of the (001) superlattice reflection. The impact of MH is significant and this study outlines a successful method towards imaging of strong phase objects using the next generation of coherent X-ray sources, including X-ray free-electron lasers. International Union of Crystallography 2021-06-01 /pmc/articles/PMC8284403/ /pubmed/34212879 http://dx.doi.org/10.1107/S160057752100477X Text en © Kim, Scholz and Madsen 2021 https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited. |
spellingShingle | Research Papers Kim, Chan Scholz, Markus Madsen, Anders The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography |
title | The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography |
title_full | The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography |
title_fullStr | The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography |
title_full_unstemmed | The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography |
title_short | The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography |
title_sort | influence of strain on image reconstruction in bragg coherent x-ray diffraction imaging and ptychography |
topic | Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8284403/ https://www.ncbi.nlm.nih.gov/pubmed/34212879 http://dx.doi.org/10.1107/S160057752100477X |
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