Fig. 3: Evaluated intensity distributions of focused beam. | Nature Communications

Fig. 3: Evaluated intensity distributions of focused beam.

From: High-fluence and high-gain multilayer focusing optics to enhance spatial resolution in femtosecond X-ray laser imaging

Fig. 3

The intensity distributions in the focal plane were measured using a knife-edge scanning method at an XFEL repetition rate of 30 Hz. The evaluated focal spot size was a 110 nm (full width at half-maximum (FWHM)) in the horizontal direction and b 60 nm (FWHM) in the vertical direction at scan steps of 25 and 15 nm, respectively. In a and b, intensities of 600 and 100 XFEL pulses were averaged for each data point, respectively.

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