Fig. 3
From: Seeded X-ray free-electron laser generating radiation with laser statistical properties
Seeded mode single and multiple pulses analysis. Intensity correlation functions (a, c) and spectral structure (b, d) for the sorted pulses with the lowest (a, b) and highest (c, d) number of modes. In (b, d) representative single pulses are shown by blue lines, an average over 103 pulses is shown by black lines, and Gaussian fit by red dashed lines. Note the different scale in frequency ω in comparison with Fig. 2b, d
