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Figure 7
Time-of-flight ion spectra from xenon clusters with an average size of 24 nm in radius, averaged over 200 single FEL shots. The central column presents pump–probe ion spectra from −33 ps to 650 ps (the maximum delay values are not fully identical to Table 2[link] due to a different mirror holder setup at that time). The signal from higher charge states increases with time-delay, suitable for optimizing the spatial overlap at long time-delays. The left and right columns show corresponding spectra of pump- or probe-pulse only, each obtained with a relatively low power density of about 2.0 × 1012 W cm−2 at 13.5 nm wavelength. Note that the additionally visible charge states in the pump-only spectrum at −33 ps result from an experimental artifact (the probe-pulse was not fully blocked at this data point).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 25| Part 5| September 2018| Pages 1517-1528
https://doi.org/10.1107/S1600577518006094
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