High-Charge XUV Vortex Beam: Generation and Hartmann Wavefront Sensor Characterization

In this paper, we present the characterization of high charge vortex structure of anOAMbeam produced through high-harmonic generation in a rare gas using an XUV Hartmann wavefront sensor. We show that the phase-matched absorption limited high-harmonic generation is able to retain the high-charge vortex structure of the XUV beam even in a rather long (1 cm) generation medium. Additionally, our recent results on the influence of infrared driver wavefront quality on the characteristics of XUV vortex beam are presented.