Evolution of elastic x-ray scattering in laser-shocked warm dense lithium

N.L. Kugland, G. Gregori, S. Bandyopadhyay, C.M. Brenner, C.R.D. Brown, C. Constantin, S.H. Glenzer, Fida Khattak, A.L. Kritcher, C. Niemann, A. Otten, J. Pasley, A. Pelka, M. Roth, C. Spindloe, David Riley

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8 Citations (Scopus)

Abstract

We have studied the dynamics of warm dense Li with near-elastic x-ray scattering. Li foils were heated and compressed using shock waves driven by 4-ns-long laser pulses. Separate 1-ns-long laser pulses were used to generate a bright source of 2.96 keV Cl Ly-alpha photons for x-ray scattering, and the spectrum of scattered photons was recorded at a scattering angle of 120 degrees using a highly oriented pyrolytic graphite crystal operated in the von Hamos geometry. A variable delay between the heater and backlighter laser beams measured the scattering time evolution. Comparison with radiation-hydrodynamics simulations shows that the plasma is highly coupled during the first several nanoseconds, then relaxes to a moderate coupling state at later times. Near-elastic scattering amplitudes have been successfully simulated using the screened one-component plasma model. Our main finding is that the near-elastic scattering amplitudes are quite sensitive to the mean ionization state Z and by extension to the choice of ionization model in the radiation-hydrodynamics simulations used to predict plasma properties within the shocked Li.
Original languageEnglish
Article number066406
Pages (from-to)066406-1-066406-4
Number of pages4
JournalPhysical Review E
Volume80
Issue number6
DOIs
Publication statusPublished - 17 Dec 2009

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

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    Kugland, N. L., Gregori, G., Bandyopadhyay, S., Brenner, C. M., Brown, C. R. D., Constantin, C., Glenzer, S. H., Khattak, F., Kritcher, A. L., Niemann, C., Otten, A., Pasley, J., Pelka, A., Roth, M., Spindloe, C., & Riley, D. (2009). Evolution of elastic x-ray scattering in laser-shocked warm dense lithium. Physical Review E, 80(6), 066406-1-066406-4. [066406]. https://doi.org/10.1103/PhysRevE.80.066406