Figure 1: Schematic representation of the experiment. | Nature Communications

Figure 1: Schematic representation of the experiment.

From: High-intensity double-pulse X-ray free-electron laser

Figure 1

Illustration not to scale. From right to left: a laser pulse train generates two electron bunches at a photocathode (the right inset shows the measured longitudinal phase-space at the photo-injector exit). The two bunches are accelerated in the LCLS linac and compressed by means of two magnetic chicanes (the left inset shows the measured phase-space at the end of the beam line). Finally, the two bunches are sent to an undulator for the emission of two X-ray FEL pulses. The two X-ray pulses have a tunable energy difference in the range of a few percent and a variable time delay of tens of fs.

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