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Figure 13
Differences [\Delta h\nu] of the values of the photon energy [h\nu_{\rm{org}}] and [h\nu^{\rm{cog}}_{\rm{PCA}}]. [h\nu_{\rm{org}}] has been derived by applying the standard wavelength monitoring analysis based on a line profile fit procedure to the original raw ADC traces. [h\nu^{\rm{cog}}_{\rm{PCA}}] has been calculated converting the TOF values determined by center of gravity positions of the prompt signal and the Ar 3p photoemission lines with the existing time-to-energy calibration function. The photon energy result for a single shot i was determined from a moving average spectrum of the 21 shots [i − 10, i + 10]. Upper panel: [\Delta h\nu] of 9992 single shots for all bunch numbers. Lower panel: histograms of [\Delta h\nu] for each bunch number. Note that the plot ranges for [\Delta h\nu] are ten times larger compared with Fig. 11[link].

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