The ultrafast X-ray spectroscopy endstation is equipped with a grating-based X-ray spectrometer with a cross-bar optical design to resolve the x-ray energies and the time-delays at the same time.
The optical pumping laser is irradiating normally on to the sample surface while the probing XFEL pulses incidental to the sample surface with an grazing angle of 2 degree. This cross-bar optical design encodes the time-delay between the two pulses onto the sample surface, which is imaged on to the detector.
The Ultrafast X-ray Spectroscopy for Chemistry system can be used to study the ultrafast processes including chemical reaction kinetics, energy/charge-transfer process.