Figure 1

Summary of the beamline. Soft X-ray pulses are produced from high-order harmonic generation with few-cycle SWIR pulses in helium. Few-cycle pulses centered at 800 nm are simultaneously produced and are used as a pump in ultrafast transient absorption experiments. The different steps are detailed in the text. A typical X-ray camera image is shown at the bottom right. The drop in signal after ~280 eV is due to carbon contamination of the X-ray optics, causing absorption at the carbon K-edge.