Single-shot third-harmonic spectral diagnostics for tender X-ray FEL pulses using a bent-crystal spectrometer

Arrell, C.; Lemke, H.; Prat, E.

doi:10.1107/S1600577526006739

Figure 4
Comparison of the average spectral distribution of the 2.5 keV fundamental measured by scanning the beamline monochromator (blue curve) with the average third-harmonic spectrum measured using the bent-crystal spectrometer (black curve). For the third-harmonic spectrum, the photon-energy axis is divided by three so that both curves are plotted as a function of the fundamental photon energy. The close agreement in spectral width and shape demonstrates that the scaled third-harmonic spectrum faithfully reproduces the bandwidth of the tender X-ray fundamental.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 33| Part 5| September 2026|

https://doi.org/10.1107/S1600577526006739

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