Bremen 2017 – scientific programme
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P: Fachverband Plasmaphysik
P 19: Plasma Diagnostics IV
P 19.3: Talk
Wednesday, March 15, 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 Samsonova1,2, Sebastian Höfer1, Ingo Uschmann1,2, Vural Kaymak3, Skirmantas Ališauskas4, Audrius Pugžlys4, Lukas Trefflich5, Carsten Ronning5, Alexander Pukhov3, Andruis Baltuška4, Eckhart Förster1,2, Christian Spielmann1,2, 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.