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- Title
Optimized spatial overlap in optical pump-X-ray probe experiments with high repetition rate using laser-induced surface distortions.
- Authors
Reinhardt, Matthias; Koc, Azize; Leitenberger, Wolfram; Gaal, Peter; Bargheer, Matias
- Abstract
Ultrafast X-ray diffraction experiments require careful adjustment of the spatial overlap between the optical excitation and the X-ray probe pulse. This is especially challenging at high laser repetition rates. Sample distortions caused by the large heat load on the sample and the relatively low optical energy per pulse lead to only tiny signal changes. In consequence, this results in small footprints of the optical excitation on the sample, which turns the adjustment of the overlap difficult. Here a method for reliable overlap adjustment based on reciprocal space mapping of a laser excited thin film is presented.
- Subjects
X-ray diffraction; SURFACE distortion; EXCITATION spectrum
- Publication
Journal of Synchrotron Radiation, 2016, Vol 23, Issue 2, p474
- ISSN
0909-0495
- Publication type
Article
- DOI
10.1107/S1600577515024443