Synchrotron-based ultrafast x-ray diffraction at high repetition rates
- We present a setup for ultrafast x-ray diffraction (UXRD) based at the storage ring BESSY II, in particular, a pump laser that excites the sample using 250 fs laser-pulses at repetition rates ranging from 208 kHz to 1.25 MHz. We discuss issues connected to the high heat-load and spatio-temporal alignment strategies in the context of a UXRD experiment at high repetition rates. The spatial overlap between laser pump and x-ray probe pulse is obtained with 10 mu m precision and transient lattice changes can be recorded with an accuracy of delta a/a(0) = 10(-6). We also compare time-resolved x-ray diffraction signals from a laser excited LSMO/STO superlattice with phonon dynamics simulations. From the analysis we determine the x-ray pulse duration to 120 ps in standard operation mode and below 10 ps in low-alpha mode.
Author details: | H. Navirian, R. Shayduk, Wolfram LeitenbergerGND, J. Goldshteyn, P. Gaal, Matias BargheerORCiDGND |
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DOI: | https://doi.org/10.1063/1.4727872 |
ISSN: | 0034-6748 |
Title of parent work (English): | Review of scientific instruments : a monthly journal devoted to scientific instruments, apparatus, and techniques |
Publisher: | American Institute of Physics |
Place of publishing: | Melville |
Publication type: | Article |
Language: | English |
Year of first publication: | 2012 |
Publication year: | 2012 |
Release date: | 2017/03/26 |
Volume: | 83 |
Issue: | 6 |
Number of pages: | 7 |
Funding institution: | BMBF [05K10IP1]; Deutsche Forschungsgemeinschaft (DFG) [SFB 762] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
Peer review: | Referiert |