Time-resolved diffraction with an optimized short pulse laser plasma X-ray source
Mohammadmahdi Afshari, Philipp Krumey, Dennis Menn, M. Nicoul, F. Brinks, A. Tarasevitch, K. Sokolowski-Tinten
Abstract
We present a setup for time-resolved X-ray diffraction based on a short pulse, laser-driven plasma X-ray source. The employed modular design provides high flexibility to adapt the setup to the specific requirements (e.g., X-ray optics and sample environment) of particular applications. The configuration discussed here has been optimized toward high angular/momentum resolution and uses Kα-radiation (4.51 keV) from a Ti wire-target in combination with a toroidally bent crystal for collection, monochromatization, and focusing of the emitted radiation. 2×105 Ti-Kα1 photons per pulse with 10−4 relative bandwidth are delivered to the sample at a repetition rate of 10 Hz. This allows for the high dynamic range (104) measurements of transient changes in the rocking curves of materials as for example induced by laser-triggered strain waves.