Time-resolved diffraction with an optimized short pulse laser plasma X-ray source

摘要

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 Ksub α /sub-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 × 10 5 Ti-Ksub α 1/sub 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 (10sup4/sup) measurements of transient changes in the rocking curves of materials as for example induced by laser-triggered strain waves.