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P: Fachverband Plasmaphysik

P 19: Plasma Diagnostics IV

P 19.3: Vortrag

Mittwoch, 15. März 2017, 15:30–15:45, HS 1010

Highly efficient source of Kα radiation driven by relativistic interaction of mid-infrared laser pulses with nanostructured solid targets — •Zhanna Samsonova^1,2, Sebastian Höfer¹, Ingo Uschmann^1,2, Vural Kaymak³, Skirmantas Ališauskas⁴, Audrius Pugžlys⁴, Lukas Trefflich⁵, Carsten Ronning⁵, Alexander Pukhov³, Andruis Baltuška⁴, Eckhart Förster^1,2, Christian Spielmann^1,2, and Daniil Kartashov² — ¹Helmholtz Institute Jena, Jena, Germany — ²Institute of Optics and Quantum Electronics, Abbe Center of Photonics, Friedrich-Schiller-University Jena, Jena Germany — ³Institute for Theoretical Physics, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany — ⁴Photonics Institute, Vienna University of Technology, Vienna, Austria — ⁵Institute of Solid State Physics, Friedrich-Schiller-University Jena, Jena, Germany

We report on recent studies of a novel regime of relativistic laser-plasma interaction between solid nanostructures targets and ultra-intense mid-infrared pulses at 3.9 μm. We experimentally investigate the dependence of X-ray generation on the morphology of the targets and focusing conditions. A record high conversion efficiency of the essentially background free, cold Zn K-shell emission reaches a value of 3E-4 using only 20 mJ laser pulses. Numerical PIC-simulations predict solid density plasma with the electron temperature close to the estimations from the measurements. Our results suggest that relativistic interaction of long wavelength femtosecond laser pulses with nanostructured solids is a very promising way to realize highly efficient, femtosecond X-ray backlighter for high density plasma physics.