Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication
Probing C-H mixtures at conditions relevant to planetary interiors and inertial confinement fusion
Kraus, D.;
Carbon-hydrogen (C-H) mixtures at extreme pressure and temperature conditions are highly relevant for the interiors of icy giant planets like Neptune and Uranus where pressures of several Mbar are present in their deep interiors. Moreover, C-H is used as ablator material in contemporary inertial confinement fusion concepts. Here, the ablator material passes various warm dense matter and dense plasma states up to the Gbar regime. Experiments at state-of-the-art facilities allow for insights of unprecedented quality into such extreme states of matter. At the Linac Coherent Light Source (LCLS), we have investigated C-H mixtures at conditions comparable to planetary interiors [1] and the very first compression stages of ICF showing structural transitions and chemical activity applying various X-ray diagnostic techniques in one experiment. In other experiments, performed at the National Ignition Facility and using spectrally resolved X-ray scattering in combination with radiography, we have investigated the ionization balance of warm and hot dense C-H at conditions that comparable to later compression stages of ICF as well the interiors of Brown Dwarfs or small stars. These results indicate that, particularly for mixtures, standard ionization models may require revisions in the regime of warm and hot dense matter [2].

[1] D. Kraus et al., Nature Astronomy 1, 606-611 (2017).
[2] D. Kraus et al., Physical Review E 94, 011202(R) (2016).
  • Invited lecture (Conferences)
    3rd International Conference on Matter and Radiation at Extremes, 06.-11.05.2018, Qingdao, China

Publ.-Id: 27410 - Permalink