Dense plasma X-ray scattering: Methods and applications

Glenzer, S. H.; Lee, H. J.; Davis, P.; Doppner, T.; Falcone, R. W.; Fortmann, C.; Hammel, B. A.; Kritcher, A. L.; Landen, O. L.; Lee, R. W.; Munro, D. H.; Redmer, R.; Weber, S.

doi:10.1016/j.hedp.2009.09.003

Dense plasma X-ray scattering: Methods and applications

Journal Article · Fri Oct 09 04:00:00 EDT 2009 · High Energy Density Physics

DOI:https://doi.org/10.1016/j.hedp.2009.09.003· OSTI ID:1334342

Glenzer, S. H. ^[1]; Lee, H. J. ^[2]; Davis, P. ^[2]; Doppner, T. ^[3]; Falcone, R. W. ^[2]; Fortmann, C. ^[4]; Hammel, B. A. ^[3]; Kritcher, A. L. ^[2]; Landen, O. L. ^[3]; Lee, R. W. ^[3]; Munro, D. H. ^[3]; Redmer, R. ^[4]; Weber, S. ^[3]

Lawrence Livermore National Lab. (LLNL), Univ. of California, Livermore, CA (United States); University of California, Berkeley
Univ. of California, Berkeley, CA (United States)
Lawrence Livermore National Lab. (LLNL), Univ. of California, Livermore, CA (United States)
Univ. Rostock, Rostock (Germany)

Here, we have developed accurate x-ray scattering techniques to measure the physical properties of dense plasmas. Temperature and density are inferred from inelastic x-ray scattering data whose interpretation is model-independent for low to moderately coupled systems. Specifically, the spectral shape of the non- collective Compton scattering spectrum directly reflects the electron velocity distribution. In partially Fermi-degenerate systems that have been investigated experimentally in laser shock-compressed beryllium, the Compton scattering spectrum provides the Fermi energy and hence the electron density. We show that forward scattering spectra that observe collective plasmon oscillations yield densities in agreement with non-collective Compton scattering. In addition, electron temperatures inferred from the dispersion of the plasmon feature are consistent with the ion temperature sensitive elastic scattering feature. Hence, theoretical models of the static ion–ion structure factor and consequently the equation of state of dense matter can be directly tested.

Research Organization:: Univ. of California, Berkeley, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FG52-06NA26212

OSTI ID:: 1334342

Journal Information:: High Energy Density Physics, Journal Name: High Energy Density Physics Journal Issue: 1 Vol. 6; ISSN 1574-1818

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

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