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Figure 1
Typical spectra of (a) five SASE pulses and (b) five self-seeded pulses. The position and shape of the highly spiky SASE spectra vary widely on a shot-by-shot basis. The self-seeded pulse spectra are more monochromatic, depending on the success of the self-seeding process. Pulses 1, 2 and 5 were successfully self-seeded, whereas for pulses 3 and 4 the self-seeding process failed to produce a spectrum with a single peak. However, even these two pulses are more monochromatic than any of the SASE pulses in panel (a).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 22| Part 3| May 2015| Pages 644-652
https://doi.org/10.1107/S1600577515005184
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