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Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging

Bragg coherent diffraction imaging (BCDI) is a powerful technique to explore the local strain state and morphology of microscale crystals. The method can potentially reach nanometer-scale spatial resolution thanks to the advances in synchrotron design that dramatically increase coherent flux. Howeve...

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Autores principales: Calvo-Almazán, I., Allain, M., Maddali, S., Chamard, V., Hruszkewycz, S. O.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6477045/
https://www.ncbi.nlm.nih.gov/pubmed/31011168
http://dx.doi.org/10.1038/s41598-019-42797-4
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author Calvo-Almazán, I.
Allain, M.
Maddali, S.
Chamard, V.
Hruszkewycz, S. O.
author_facet Calvo-Almazán, I.
Allain, M.
Maddali, S.
Chamard, V.
Hruszkewycz, S. O.
author_sort Calvo-Almazán, I.
collection PubMed
description Bragg coherent diffraction imaging (BCDI) is a powerful technique to explore the local strain state and morphology of microscale crystals. The method can potentially reach nanometer-scale spatial resolution thanks to the advances in synchrotron design that dramatically increase coherent flux. However, there are experimental bottlenecks that may limit the image reconstruction quality from future high signal-to-noise ratio measurements. In this work we show that angular uncertainty of the sample orientation with respect to a fixed incoming beam is one example of such a factor, and we present a method to mitigate the resulting artifacts. On the basis of an alternative formulation of the forward problem, we design a phase retrieval algorithm which enables the simultaneous reconstruction of the object and determination of the exact angular position corresponding to each diffraction pattern in the data set. We have tested the algorithm performance on simulated data for different degrees of angular uncertainty and signal-to-noise ratio.
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spelling pubmed-64770452019-05-02 Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging Calvo-Almazán, I. Allain, M. Maddali, S. Chamard, V. Hruszkewycz, S. O. Sci Rep Article Bragg coherent diffraction imaging (BCDI) is a powerful technique to explore the local strain state and morphology of microscale crystals. The method can potentially reach nanometer-scale spatial resolution thanks to the advances in synchrotron design that dramatically increase coherent flux. However, there are experimental bottlenecks that may limit the image reconstruction quality from future high signal-to-noise ratio measurements. In this work we show that angular uncertainty of the sample orientation with respect to a fixed incoming beam is one example of such a factor, and we present a method to mitigate the resulting artifacts. On the basis of an alternative formulation of the forward problem, we design a phase retrieval algorithm which enables the simultaneous reconstruction of the object and determination of the exact angular position corresponding to each diffraction pattern in the data set. We have tested the algorithm performance on simulated data for different degrees of angular uncertainty and signal-to-noise ratio. Nature Publishing Group UK 2019-04-23 /pmc/articles/PMC6477045/ /pubmed/31011168 http://dx.doi.org/10.1038/s41598-019-42797-4 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Calvo-Almazán, I.
Allain, M.
Maddali, S.
Chamard, V.
Hruszkewycz, S. O.
Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging
title Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging
title_full Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging
title_fullStr Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging
title_full_unstemmed Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging
title_short Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging
title_sort impact and mitigation of angular uncertainties in bragg coherent x-ray diffraction imaging
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6477045/
https://www.ncbi.nlm.nih.gov/pubmed/31011168
http://dx.doi.org/10.1038/s41598-019-42797-4
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