Fig. 1
From: In situ single-shot diffractive fluence mapping for X-ray free-electron laser pulses
Examples of spatial fluence distribution estimates. Simulated two-dimensional maps of the spatial fluence distribution in the sample plane (f(ξ, η), representing a an exact measurement, b a blurred, low-resolution measurement, and c a constant estimate. All maps sum to the same overall shot energy Eshot. d Fluence histograms of the three maps in a–c. e–g Simulated scattering signal I(f) for increasing overall shot energy in the three fluence distributions under the assumption of, respectively, linear, quadratic, and saturating fluence dependency. Note the double logarithmic scale in f
