Scientific instrument Femtosecond X-ray Experiments (FXE): instrumentation and baseline experimental capabilities.
J Synchrotron Radiat
; 26(Pt 5): 1432-1447, 2019 Sep 01.
Article
en En
| MEDLINE
| ID: mdl-31490131
ABSTRACT
The European X-ray Free-Electron Laser (EuXFEL) delivers extremely intense (>1012â
photonsâ
pulse-1 and up to 27000â
pulsesâ
s-1), ultrashort (<100â
fs) and transversely coherent X-ray radiation, at a repetition rate of up to 4.5â
MHz. Its unique X-ray beam parameters enable novel and groundbreaking experiments in ultrafast photochemistry and material sciences at the Femtosecond X-ray Experiments (FXE) scientific instrument. This paper provides an overview of the currently implemented experimental baseline instrumentation and its performance during the commissioning phase, and a preview of planned improvements. FXE's versatile instrumentation combines the simultaneous application of forward X-ray scattering and X-ray spectroscopy techniques with femtosecond time resolution. These methods will eventually permit exploitation of wide-angle X-ray scattering studies and X-ray emission spectroscopy, along with X-ray absorption spectroscopy, including resonant inelastic X-ray scattering and X-ray Raman scattering. A suite of ultrafast optical lasers throughout the UV-visible and near-IR ranges (extending up to mid-IR in the near future) with pulse length down to 15â
fs, synchronized to the X-ray source, serve to initiate dynamic changes in the sample. Time-delayed hard X-ray pulses in the 5-20â
keV range are used to probe the ensuing dynamic processes using the suite of X-ray probe tools. FXE is equipped with a primary monochromator, a primary and secondary single-shot spectrometer, and a timing tool to correct the residual timing jitter between laser and X-ray pulses.
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Bases de datos:
MEDLINE
Asunto principal:
Fotoquímica
/
Espectrometría por Rayos X
/
Rayos Láser
Idioma:
En
Revista:
J Synchrotron Radiat
Asunto de la revista:
RADIOLOGIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Alemania