High-flux source of coherent XUV pulses for user applications


We present experimental results obtained at a user-oriented XUV beamline implemented at the ELI Beamlines facility. The coherent XUV radiation is produced via high harmonic generation in gases in a loose focusing geometry. The beamline is designed to be driven by 1 kHz, 100 mJ, 20 fs pulses centered at a wavelength of 830 nm. Results such as XUV spectra, beam wavefront and pulse energy obtained during the beamline commissioning with a commercial 1 kHz, 5 mJ, 40 fs laser system are presented. A unique XUV spectrometer for source characterization designed to reach a very high sensitivity is described in detail, and we demonstrate a novel technique for single-shot and every-shot XUV pulse energy measurement.

The 3D model of the HHG beamline at ELI-Beamlines facility
The 3D model of the HHG beamline at ELI-Beamlines facility: VC1- focusing of the driving beam, VC2 – HHG, VC3 + FB – laser driver rejection and filtering, VC4 – XUV diagnostics. Inset: XUV spectrum of HHG in neon.