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. Ti-Kα1 photons per pulse with 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.
Highlights
Combining atomic scale spatial and temporal resolution ultrafast time-resolved diffraction using short X-ray or electron pulses provides direct access to atomic motions in materials on their natural time scale, i.e., femtoseconds to picoseconds
We present a setup for time-resolved X-ray diffraction based on a short pulse, laser-driven plasma X-ray source
We have presented here a modular setup for timeresolved “optical-pump—X-ray-probe” diffraction experiments, which is based on a low repetition rate (10 Hz), laser-driven plasma Ka X-ray source
Summary
Combining atomic scale spatial and temporal resolution ultrafast time-resolved diffraction using short X-ray or electron pulses provides direct access to atomic motions in materials on their natural time scale, i.e., femtoseconds to picoseconds. This relatively new field of “structural dynamics” has seen tremendous progress in recent years mainly driven by the development of new sources
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