A multi-MHz single-shot data acquisition scheme with high dynamic range: pump–probe X-ray experiments at synchrotrons

Britz, A.; Assefa, T.A.; Galler, A.; Gawelda, W.; Diez, M.; Zalden, P.; Khakhulin, D.; Fernandes, B.; Gessler, P.; Sotoudi Namin, H.; Beckmann, A.; Harder, M.; Yavaş, H.; Bressler, C.

doi:10.1107/S1600577516012625

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Figure 9
Time-delay scan of the transient signal of [Fe^II(bpy)₃]²⁺ in H₂O (black triangles) and CH₃CN (blue circles) at 7125 eV (arrow in Fig. 8

), together with a fit of a Gaussian error function convoluted with a single exponential decay. The decay times of 0.6 ns in H₂O (dotted black line) and 0.9 ns in CH₃CN (solid blue line) agree with the literature data. The rise time of 0.1 ns is almost equivalent to the pulse duration of the X-rays. The relatively low S/N of ∼20 is due to the fact that these spectra were recorded with relatively poor laser/X-ray overlap conditions (after these initial time-delay scans we usually optimize overlap conditions to achieve S/N values as shown, for example, in Fig. 8

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 23| Part 6| November 2016| Pages 1409-1423

https://doi.org/10.1107/S1600577516012625

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