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Open Access Publications from the University of California

Tracking the density evolution in counter-propagating shock waves using imaging X-ray scattering

  • Author(s): Zastrau, U;
  • Gamboa, EJ;
  • Kraus, D;
  • Benage, JF;
  • Drake, RP;
  • Efthimion, P;
  • Falk, K;
  • Falcone, RW;
  • Fletcher, LB;
  • Galtier, E;
  • Gauthier, M;
  • Granados, E;
  • Hastings, JB;
  • Heimann, P;
  • Hill, K;
  • Keiter, PA;
  • Lu, J;
  • Macdonald, MJ;
  • Montgomery, DS;
  • Nagler, B;
  • Pablant, N;
  • Schropp, A;
  • Tobias, B;
  • Gericke, DO;
  • Glenzer, SH;
  • Lee, HJ
  • et al.

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We present results from time-resolved X-ray imaging and inelastic scattering on collective excitations. These data are then employed to infer the mass density evolution within laser-driven shock waves. In our experiments, thin carbon foils are first strongly compressed and then driven into a dense state by counter-propagating shock waves. The different measurements agree that the graphite sample is about twofold compressed when the shock waves collide, and a sharp increase in forward scattering indicates disassembly of the sample 1 ns thereafter. We can benchmark hydrodynamics simulations of colliding shock waves by the X-ray scattering methods employed.

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