Impact of real mirror profiles inside a split-and-delay unit on the spatial intensity profile in pump/probe experiments at the European XFEL.
compound refractive lenses
free-electron laser
hard X-rays
pump/probe experiment
split-and-delay unit
Journal
Journal of synchrotron radiation
ISSN: 1600-5775
Titre abrégé: J Synchrotron Radiat
Pays: United States
ID NLM: 9888878
Informations de publication
Date de publication:
01 Jan 2021
01 Jan 2021
Historique:
received:
13
08
2020
accepted:
03
11
2020
entrez:
5
1
2021
pubmed:
6
1
2021
medline:
6
1
2021
Statut:
ppublish
Résumé
For the High-Energy-Density (HED) beamline at the SASE2 undulator of the European XFEL, a hard X-ray split-and-delay unit (SDU) has been built enabling time-resolved pump/probe experiments with photon energies between 5 keV and 24 keV. The optical layout of the SDU is based on geometrical wavefront splitting and multilayer Bragg mirrors. Maximum delays between Δτ = ±1 ps at 24 keV and Δτ = ±23 ps at 5 keV will be possible. Time-dependent wavefront propagation simulations were performed by means of the Synchrotron Radiation Workshop (SRW) software in order to investigate the impact of the optical layout, including diffraction on the beam splitter and recombiner edges and the three-dimensional topography of all eight mirrors, on the spatio-temporal properties of the XFEL pulses. The radiation is generated from noise by the code FAST which simulates the self-amplified spontaneous emission (SASE) process. A fast Fourier transformation evaluation of the disturbed interference pattern yields for ideal mirror surfaces a coherence time of τ
Identifiants
pubmed: 33399587
pii: S1600577520014563
doi: 10.1107/S1600577520014563
pmc: PMC7842232
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
350-361Subventions
Organisme : Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie
ID : 05K10PM2
Organisme : Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie
ID : 05K13PM1
Organisme : Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie
ID : 05K16PM2
Organisme : European Metrology Programme for Innovation and Research
ID : EMRP-JRP SIB58
Informations de copyright
open access.
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