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Stability of Bragg reflectors under megahertz heat load at XFELs

Modern X-ray free-electron laser (XFEL) sources can deliver photon pulses with millijoule pulse energies and megahertz repetition rate. As shown by the simulations in this work, for particular cases the dynamical heat load effects for Bragg reflectors could cause problems at these facilities. These...

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Detalles Bibliográficos
Autores principales: Bahns, Immo, Rauer, Patrick, Rossbach, Jörg, Sinn, Harald
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9814069/
https://www.ncbi.nlm.nih.gov/pubmed/36601921
http://dx.doi.org/10.1107/S1600577522009778
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author Bahns, Immo
Rauer, Patrick
Rossbach, Jörg
Sinn, Harald
author_facet Bahns, Immo
Rauer, Patrick
Rossbach, Jörg
Sinn, Harald
author_sort Bahns, Immo
collection PubMed
description Modern X-ray free-electron laser (XFEL) sources can deliver photon pulses with millijoule pulse energies and megahertz repetition rate. As shown by the simulations in this work, for particular cases the dynamical heat load effects for Bragg reflectors could cause problems at these facilities. These problems would be underestimated if only quasi-static thermoelastic simulations are considered. Nevertheless, for the sake of simplicity the quasi-static approach is a common choice for estimating heat load effects. To emphasize the relevance of dynamical thermoelastic effects, the response to the partial absorption of an X-ray pulse, as provided by a saturated X-ray free-electron laser oscillator (XFELO) in a single crystal diamond with a thickness of 100 µm and lateral dimensions in the millimetre range, is discussed in this work. The outcome of the dynamic thermoelastic simulations indicates a clear dominance regarding the strain value reached, which is present for consecutive X-ray matter interactions with megahertz repetition rate.
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spelling pubmed-98140692023-01-09 Stability of Bragg reflectors under megahertz heat load at XFELs Bahns, Immo Rauer, Patrick Rossbach, Jörg Sinn, Harald J Synchrotron Radiat Research Papers Modern X-ray free-electron laser (XFEL) sources can deliver photon pulses with millijoule pulse energies and megahertz repetition rate. As shown by the simulations in this work, for particular cases the dynamical heat load effects for Bragg reflectors could cause problems at these facilities. These problems would be underestimated if only quasi-static thermoelastic simulations are considered. Nevertheless, for the sake of simplicity the quasi-static approach is a common choice for estimating heat load effects. To emphasize the relevance of dynamical thermoelastic effects, the response to the partial absorption of an X-ray pulse, as provided by a saturated X-ray free-electron laser oscillator (XFELO) in a single crystal diamond with a thickness of 100 µm and lateral dimensions in the millimetre range, is discussed in this work. The outcome of the dynamic thermoelastic simulations indicates a clear dominance regarding the strain value reached, which is present for consecutive X-ray matter interactions with megahertz repetition rate. International Union of Crystallography 2023-01-01 /pmc/articles/PMC9814069/ /pubmed/36601921 http://dx.doi.org/10.1107/S1600577522009778 Text en © Immo Bahns et al. 2023 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
Bahns, Immo
Rauer, Patrick
Rossbach, Jörg
Sinn, Harald
Stability of Bragg reflectors under megahertz heat load at XFELs
title Stability of Bragg reflectors under megahertz heat load at XFELs
title_full Stability of Bragg reflectors under megahertz heat load at XFELs
title_fullStr Stability of Bragg reflectors under megahertz heat load at XFELs
title_full_unstemmed Stability of Bragg reflectors under megahertz heat load at XFELs
title_short Stability of Bragg reflectors under megahertz heat load at XFELs
title_sort stability of bragg reflectors under megahertz heat load at xfels
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9814069/
https://www.ncbi.nlm.nih.gov/pubmed/36601921
http://dx.doi.org/10.1107/S1600577522009778
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