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Figure 4
(a) Spectral content and intensities of the two FEL pulses, characterized online by the energy spectrometer PRESTO in the two-colour double-pulse experiment. The purple and green areas were used to quantify the total intensity of each pulse impinging on the sample. (b) Onset of the pulse-splitting while scanning the relative time delay between the electron beam and the seed laser pulses along the modulator undulator (500 fs in this case).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 22| Part 3| May 2015| Pages 565-570
https://doi.org/10.1107/S1600577515004580
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