Fig. 5
From: In situ single-shot diffractive fluence mapping for X-ray free-electron laser pulses
Spatial fluence distributions along the beam propagation axis. a Multi-shot image of the grating’s positive diffraction order. The fluence distributions appear blurred due to spatial jitter. b Spatial fluence distribution calculated from a single-shot wave-front sensor measurement. The position z of the sample plane is given relative to the nominal focus position. Note that all images are individually normalized. The peak intensity drops rapidly when the sample moves out of the focus position. Scale bars correspond to 10 μm
