Photon-shot-noise-limited transient absorption soft X-ray spectroscopy at the European XFEL.
European XFEL
transient absorption soft X-ray spectroscopy
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 Mar 2023
01 Mar 2023
Historique:
received:
08
11
2022
accepted:
24
01
2023
entrez:
9
3
2023
pubmed:
10
3
2023
medline:
10
3
2023
Statut:
ppublish
Résumé
Femtosecond transient soft X-ray absorption spectroscopy (XAS) is a very promising technique that can be employed at X-ray free-electron lasers (FELs) to investigate out-of-equilibrium dynamics for material and energy research. Here, a dedicated setup for soft X-rays available at the Spectroscopy and Coherent Scattering (SCS) instrument at the European X-ray Free-Electron Laser (European XFEL) is presented. It consists of a beam-splitting off-axis zone plate (BOZ) used in transmission to create three copies of the incoming beam, which are used to measure the transmitted intensity through the excited and unexcited sample, as well as to monitor the incoming intensity. Since these three intensity signals are detected shot by shot and simultaneously, this setup allows normalized shot-by-shot analysis of the transmission. For photon detection, an imaging detector capable of recording up to 800 images at 4.5 MHz frame rate during the FEL burst is employed, and allows a photon-shot-noise-limited sensitivity to be approached. The setup and its capabilities are reviewed as well as the online and offline analysis tools provided to users.
Identifiants
pubmed: 36891842
pii: S1600577523000619
doi: 10.1107/S1600577523000619
pmc: PMC10000791
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
284-300Subventions
Organisme : Deutsche Forschungsgemeinschaft
ID : SFB 1242
Informations de copyright
open access.
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