Dense Plasma X-ray Scattering: Methods and Applications

Journal Article · Wed Aug 19 04:00:00 EDT 2009 · High Energy Density Physics, vol. 6, no. 1, October 9, 2009, pp. 1-8

OSTI ID:971398

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

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 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: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 971398
• Report Number(s): LLNL-JRNL-416351
• Journal Information: High Energy Density Physics, vol. 6, no. 1, October 9, 2009, pp. 1-8, Journal Name: High Energy Density Physics, vol. 6, no. 1, October 9, 2009, pp. 1-8 Journal Issue: 1 Vol. 6
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BERYLLIUM
COMPTON EFFECT
DISTRIBUTION
ELASTIC SCATTERING
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
ION TEMPERATURE
LASERS
OSCILLATIONS
PHYSICAL PROPERTIES
PLASMA
PLASMONS
SCATTERING
SHAPE
SPECTRA
STRUCTURE FACTORS
VELOCITY