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Spatial displacement of forward-diffracted X-ray beams by perfect crystals

Time-delayed, narrow-band echoes generated by forward Bragg diffraction of an X-ray pulse by a perfect thin crystal are exploited for self-seeding at hard X-ray free-electron lasers. Theoretical predictions indicate that the retardation is strictly correlated to a transverse displacement of the echo...

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Autores principales: Rodriguez-Fernandez, A., Esposito, V., Sanchez, D. F., Finkelstein, K. D., Juranic, P., Staub, U., Grolimund, D., Reiche, S., Pedrini, B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5831586/
https://www.ncbi.nlm.nih.gov/pubmed/29493536
http://dx.doi.org/10.1107/S2053273318001419
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author Rodriguez-Fernandez, A.
Esposito, V.
Sanchez, D. F.
Finkelstein, K. D.
Juranic, P.
Staub, U.
Grolimund, D.
Reiche, S.
Pedrini, B.
author_facet Rodriguez-Fernandez, A.
Esposito, V.
Sanchez, D. F.
Finkelstein, K. D.
Juranic, P.
Staub, U.
Grolimund, D.
Reiche, S.
Pedrini, B.
author_sort Rodriguez-Fernandez, A.
collection PubMed
description Time-delayed, narrow-band echoes generated by forward Bragg diffraction of an X-ray pulse by a perfect thin crystal are exploited for self-seeding at hard X-ray free-electron lasers. Theoretical predictions indicate that the retardation is strictly correlated to a transverse displacement of the echo pulses. This article reports the first experimental observation of the displaced echoes. The displacements are in good agreement with simulations relying on the dynamical diffraction theory. The echo signals are characteristic for a given Bragg reflection, the structure factor and the probed interplane distance. The reported results pave the way to exploiting the signals as an online diagnostic tool for hard X-ray free-electron laser seeding and for dynamical diffraction investigations of strain at the femtosecond timescale.
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spelling pubmed-58315862018-03-19 Spatial displacement of forward-diffracted X-ray beams by perfect crystals Rodriguez-Fernandez, A. Esposito, V. Sanchez, D. F. Finkelstein, K. D. Juranic, P. Staub, U. Grolimund, D. Reiche, S. Pedrini, B. Acta Crystallogr A Found Adv Research Papers Time-delayed, narrow-band echoes generated by forward Bragg diffraction of an X-ray pulse by a perfect thin crystal are exploited for self-seeding at hard X-ray free-electron lasers. Theoretical predictions indicate that the retardation is strictly correlated to a transverse displacement of the echo pulses. This article reports the first experimental observation of the displaced echoes. The displacements are in good agreement with simulations relying on the dynamical diffraction theory. The echo signals are characteristic for a given Bragg reflection, the structure factor and the probed interplane distance. The reported results pave the way to exploiting the signals as an online diagnostic tool for hard X-ray free-electron laser seeding and for dynamical diffraction investigations of strain at the femtosecond timescale. International Union of Crystallography 2018-02-23 /pmc/articles/PMC5831586/ /pubmed/29493536 http://dx.doi.org/10.1107/S2053273318001419 Text en © A. Rodriguez-Fernandez et al. 2018 http://creativecommons.org/licenses/by/2.0/uk/ 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.http://creativecommons.org/licenses/by/2.0/uk/
spellingShingle Research Papers
Rodriguez-Fernandez, A.
Esposito, V.
Sanchez, D. F.
Finkelstein, K. D.
Juranic, P.
Staub, U.
Grolimund, D.
Reiche, S.
Pedrini, B.
Spatial displacement of forward-diffracted X-ray beams by perfect crystals
title Spatial displacement of forward-diffracted X-ray beams by perfect crystals
title_full Spatial displacement of forward-diffracted X-ray beams by perfect crystals
title_fullStr Spatial displacement of forward-diffracted X-ray beams by perfect crystals
title_full_unstemmed Spatial displacement of forward-diffracted X-ray beams by perfect crystals
title_short Spatial displacement of forward-diffracted X-ray beams by perfect crystals
title_sort spatial displacement of forward-diffracted x-ray beams by perfect crystals
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5831586/
https://www.ncbi.nlm.nih.gov/pubmed/29493536
http://dx.doi.org/10.1107/S2053273318001419
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