SMuK 2023 – scientific programme
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P: Fachverband Plasmaphysik
P 13: Laser Plasmas I
P 13.3: Talk
Thursday, March 23, 2023, 11:45–12:00, CHE/0089
Relativistic High Harmonic Generation from solid density foils with a PW class short pulse laser. — •Milenko Vescovi1, Marvin Elias Paul Umlandt1,2, Stefan Assenbaum1,2, Thomas Meric1,2, Florian Kroll1, Martin Rehwald1, Radka Stefanikova1,2, Thomas Püschel1, Irene Prencipe1, Stephan Kraft1, Ulrich Schramm1,2, and Karl Zeil1 — 1Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden — 2Technische Universität Dresden, 01062, Dresden
Relativistic High Harmonic Generation (HHG) from the interaction of high intensity lasers with over dense targets has become a topic of great interest in recent years because of its potential to achieve high energy, coherent short pulses of XUV emission. Several studies have shown the mechanism to be highly sensitive to the laser-plasma interaction conditions. Characterization of the high harmonic spectrum could then be used to probe the interaction during the high intensity fraction of the laser pulse, which is usually of most interest because of the extreme matter conditions but challenging to access experimentally. Measurements of the XUV harmonic spectrum have been conducted with the Draco PW laser (peak intensities up to 6×1021 W/cm2 in 30fs FWHM). With the aim of using HHG to gain a better understanding about the interaction, different conditions were studied. Harmonics from 14nm to 17nm wavelength were measured from bulk SiO2 targets, metal foils and plastic foils, as well as driving laser energies. In this work, general features of this parameter scan are shown and its potential link to the laser plasma interaction is discussed.