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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 4: New Accelerator Concepts
AKBP 4.3: Vortrag
Montag, 16. März 2020, 17:00–17:15, GÖR 226
Resonant small angle x-ray scattering probing ultrashort pulse high-intensity laser-solid interactions — •Lennart Gaus1, Michael Bussmann1, Alejandro Laso García1, Siegfried Glenzer2, Christian Gutt3, Bob Nagler2, Alexander Pelka1, Melanie Rödel1, Hans-Peter Schlenvoigt1, Tom Cowan1, Ulrich Schramm1, and Thomas Kluge1 — 1HZDR — 2SLAC — 3Universität Siegen
The development of second-generation short-pulse laser-driven radiation sources requires a mature understanding of the relativistic laser-plasma processes as e.g. plasma oscillations, heating and transport of relativistic electrons as well as the development of plasma instabilities. These dynamic effects occurring on femtosecond and nanometer scales are very difficult to access experimentally. In a first experiment in 2014 at the Matter of Extreme Conditions facility at LCLS we demonstrated that small angle x-ray scattering (SAXS) of femtosecond x-ray free electron laser (XFEL) pulses is able to make these fundamental processes accessible on the relevant time and length scales in direct in-situ pump-probe experiments [Kluge et al., Phys. Rev. X 8, 031068 (2018)]. Here we report on a recent follow-up experiment with significantly higher pump intensity reaching the relativistic intensity domain. We give an overview of the new capabilities in combining a full suite of particle and radiation diagnostics and SAXS scattering. Especially probing at resonant x-ray energies can give new insight into the ultra-fast ionization processes, plasma opacity and equation-of-state in non-equilibrium plasmas.