Fig. 4: FEL power profile reconstruction for four different configurations. | Nature Communications

Fig. 4: FEL power profile reconstruction for four different configurations.

From: An X-ray free-electron laser with a highly configurable undulator and integrated chicanes for tailored pulse properties

Fig. 4

a standard pulses, where the whole bunch is lasing, (b) short pulses with standard power, (c) two-colour short pulses, and (d) high-power short pulses. Top plots: single-shot images for lasing-on conditions. Middle plots: single-shot images for lasing-off conditions. In the images, E indicates the energy of the electrons in arbitrary units, and t the time in femtoseconds (with t > 0 corresponding to the head of the bunch and t < 0 to the tail). Bottom plots: FEL power profiles reconstructed by comparing lasing-on and -off conditions (the bold profiles show average profiles, the rest correspond to single-shot power profiles). See text and Methods for more details.

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