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Article Dans Une Revue Journal of Synchrotron Radiation Année : 2023

Photon-shot-noise-limited transient absorption soft X-ray spectroscopy at the European XFEL

Loïc Le Guyader
Martin Beye
David Hickin
  • Fonction : Auteur
Naman Agarwal
  • Fonction : Auteur
Robert Carley
  • Fonction : Auteur
Andrea Castoldi
Wajid Ehsan
  • Fonction : Auteur
Robin Engel
Carlo Fiorini
Luca Gelisio
Rafael Gort
Steffen Hauf
  • Fonction : Auteur
Ebad Kamil
  • Fonction : Auteur
Suren Karabekyan
Thomas Kluyver
David Lomidze
  • Fonction : Auteur
Laurent Mercadier
Giuseppe Mercurio
Kiana Setoodehnia
Jun Zhu
  • Fonction : Auteur
Christian David
Matteo Porro
Andreas Scherz

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.
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vendredi 25 octobre 2024
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Dates et versions

hal-04257533 , version 1 (25-10-2023)

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Citer

Loïc Le Guyader, Andrea Eschenlohr, Martin Beye, William Schlotter, Florian Döring, et al.. Photon-shot-noise-limited transient absorption soft X-ray spectroscopy at the European XFEL. Journal of Synchrotron Radiation, 2023, 30 (2), pp.284-300. ⟨10.1107/S1600577523000619⟩. ⟨hal-04257533⟩
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