TY  - JOUR
A1  - Navirian, H.
A1  - Shayduk, R.
A1  - Leitenberger, Wolfram
A1  - Goldshteyn, J.
A1  - Gaal, P.
A1  - Bargheer, Matias
T1  - Synchrotron-based ultrafast x-ray diffraction at high repetition rates
JF  - Review of scientific instruments : a monthly journal devoted to scientific instruments, apparatus, and techniques
N2  - 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.
Y1  - 2012
U6  - https://doi.org/10.1063/1.4727872
SN  - 0034-6748
VL  - 83
IS  - 6
PB  - American Institute of Physics
CY  - Melville
ER  -