Compact hard X-ray split-and-delay line for studying ultrafast dynamics at free-electron laser sources

A compact hard X-ray split-and-delay line for studying ultrafast dynamics at free-electron laser sources is presented. The device is capable of splitting a single X-ray pulse into two fractions to introduce time delays from − 5 to 815   ps with femtosecond resolution. The split-and-delay line can operate in a wide and continuous energy range between 7 and 16   keV. Compact dimensions of 60 × 60 × 30   cm with a total weight of about 60   kg make it portable and suitable for direct installation in an experimental hutch. The concept of the device is based on crystal diffraction. The piezo-driven stages utilized in the device give nanometre positioning accuracy. On-line monitoring systems based on X-ray cameras and intensity monitors are implemented to provide active alignment feedback. Performance estimates of the system are also presented.

Source: Journal of Synchrotron Radiation - June 3, 2019 Category: Physics Authors: Rysov, R. Roseker, W. Walther, M. Gr ü bel, G. Tags: X-ray optics delay lines free-electron lasers FELs ultrafast dynamics X-ray photon correlation spectroscopy XPCS pump – probe experiments research papers Source Type: research