München 2019 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 10: New Accelerator Concepts
AKBP 10.4: Vortrag
Mittwoch, 20. März 2019, 11:45–12:00, HS 8
Stand-alone laser system for off-harmonic optical probing of high intensity laser interaction with cryogenic hydrogen jet targets — •Constantin Bernert1,2, Markus Loeser1, Lieselotte Obst-Hübel1,2, Martin Rehwald1,2, Mathias Siebold1, Karl Zeil1, Tim Ziegler1,2, and Ulrich Schramm1,2 — 1Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany — 2TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany
The availability of high-intensity short-pulse lasers in the Peta-Watt regime drives the development of new and compact accelerator schemes like for example the generation of multiple 10 MeV proton beams from high-density targets. Particularly cryogenic hydrogen jet-targets offer the benefit of being debris-free and capable of high-repetition rate applications. Together with spatially and temporally resolved optical probing techniques this target is most suitable for a comparison to numerical particle-in-cell simulations. However, the strong plasma self-emission often masks the laser-target interaction point and thus complicates the data analysis.
Here we show the performance of a probe-laser-system operating at a central wavelength of 1030nm far off the fundamental wavelength of the drive laser at 800nm. The application in an experimental campaign dedicated to laser-proton acceleration together with cryogenic hydrogen jet-targets showed a significant improvement of imaging quality for the laser-target interaction concerning the plasmas self-emission.