Fig. 1. Spectral conditions and experimental setup for XUV focusing. ( (IMAGE)

Ultrafast Science

Fig. 1. Spectral conditions and experimental setup for XUV focusing. (

Caption

Fig. 1. Spectral conditions and experimental setup for XUV focusing. (a) Spectral

conditions relevant to the focusing experiments. The APT (black dashed line) and IAP

(red solid line) spectra at the XUV focus are shown, along with the transmission of a 100-

nm-thick Zr thin-film filter (green dotted line) and the reflectivity of the Mo/Si multilayer

coating for s-polarized light (blue dashed–dotted line). The Zr-filter transmission was

calculated using the optical constants reported in Refs. [34,35]. (b) Schematic of HHG

beamline. The system comprises waveform synthesis, HHG in a gas cell, and XUV beam

transport. (c) Enlarged view of the focusing region. The incident beam is drawn thicker

than the scale for clarity.

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Ultrafast Science

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