Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Observations of Continuum Depression in Warm Dense Matter with X-Ray Thomson Scattering

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [4];  [5];  [6];  [6];  [7];  [8];  [9]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of California, Berkeley, CA (United States); University of California, Berkeley
  2. Lawrence Livermore National Lab. (LLNL), Univ. of California, Livermore, CA (United States)
  3. Max-Planck-Institut fur die Physik Komplexer Systeme, Dresden (Germany)
  4. AWE plc, Reading (United Kingdom); Univ. of Warwick, Coventry (United Kingdom)
  5. Univ. of Warwick, Coventry (United Kingdom)
  6. Univ. of Washington, Seattle, WA (United States)
  7. Univ. of Oxford, Oxford (United Kingdom)
  8. Univ. of California, Berkeley, CA (United States)
  9. SLAC National Accelerator Lab., Menlo Park, CA (United States)

Detailed measurements of the electron densities, temperatures, and ionization states of compressed CH shells approaching pressures of 50 Mbar are achieved with spectrally resolved x-ray scattering. Laser- produced 9 keV x-rays probe the plasma during the transient state of three-shock coalescence. High signal- to-noise x-ray scattering spectra show direct evidence of continuum depression in highly degenerate warm dense matter states with electron densities $$n_e$$ > 1024 cm–3. Furthermore, the measured densities and temperatures agree well with radiation-hydrodynamic modeling when accounting for continuum lowering in calculations that employ detailed configuration accounting.

Research Organization:
Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Engineering and Physical Sciences Research Council (EPSRC)
Grant/Contract Number:
NA0000910; AC52-07NA27344; AC02-76SF00515; FG52-07NA28057; FG52-09NA29035; SC0008580
OSTI ID:
1334520
Alternate ID(s):
OSTI ID: 1123449
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 112; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (54)

Single configuration Dirac-Fock atom code journal November 1996
Electronic energy-levels in dense plasmas journal March 1982
Dense matter characterization by X-ray Thomson scattering journal October 2001
Simulation of X-ray scattering diagnostics in multi-dimensional plasma journal September 2013
Measurement of carbon ionization balance in high-temperature plasma mixtures by temporally resolved X-ray scattering journal May 2006
HELIOS-CR – A 1-D radiation-magnetohydrodynamics code with inline atomic kinetics modeling journal May 2006
Principles of Plasma Spectroscopy book January 1997
Probing warm dense lithium by inelastic X-ray scattering journal October 2008
Three-dimensional HYDRA simulations of National Ignition Facility targets journal May 2001
The physics basis for ignition using indirect-drive targets on the National Ignition Facility journal February 2004
Electronic structure measurements of dense plasmas journal May 2004
Lowering of the Ionization Energy for a Plasma in Thermodynamic Equilibrium journal January 1963
Diagnosing direct-drive, shock-heated, and compressed plastic planar foils with noncollective spectrally resolved x-ray scattering journal December 2007
Point design targets, specifications, and requirements for the 2010 ignition campaign on the National Ignition Facility journal May 2011
The experimental plan for cryogenic layered target implosions on the National Ignition Facility—The inertial confinement approach to fusion journal May 2011
Cryogenic thermonuclear fuel implosions on the National Ignition Facility journal May 2012
Theoretical treatments of the bound-free contribution and experimental best practice in X-ray Thomson scattering from warm dense matter journal February 2013
X-ray Thomson scattering measurements of temperature and density from multi-shocked CH capsules journal May 2013
A new quotidian equation of state (QEOS) for hot dense matter journal January 1988
Lowering of Ionization Potentials in Plasmas journal April 1966
Progress in the study of warm dense matter journal November 2005
Interaction of photons with plasmas and liquid metals - photoabsorption and scattering journal December 1999
The Physics of Inertial Fusion book January 2004
A Collective Description of Electron Interactions: II. Collective vs Individual Particle Aspects of the Interactions journal January 1952
Compton Scattering of X Rays from Bound Electrons journal August 1970
Dielectric response of quantum plasmas in thermal equilibrium journal March 1984
Theoretical model of x-ray scattering as a dense matter probe journal February 2003
Generalized x-ray scattering cross section from nonequilibrium plasmas journal August 2006
Screening of ionic cores in partially ionized plasmas within linear response journal June 2010
X-Ray Scattering Measurements of Radiative Heating and Cooling Dynamics journal July 2008
X-Ray Thomson-Scattering Measurements of Density and Temperature in Shock-Compressed Beryllium journal March 2009
Measurement of Short-Range Correlations in Shock-Compressed Plastic by Short-Pulse X-Ray Scattering journal April 2009
Measurements of Ionic Structure in Shock Compressed Lithium Hydride from Ultrafast X-Ray Thomson Scattering journal December 2009
Plasmons in Strongly Coupled Shock-Compressed Matter journal August 2010
Ultrafast Melting of Carbon Induced by Intense Proton Beams journal December 2010
In-Flight Measurements of Capsule Shell Adiabats in Laser-Driven Implosions journal July 2011
Probing the Interiors of the Ice Giants: Shock Compression of Water to 700 GPa and 3.8     g / cm 3 journal February 2012
Measurement of Radiative Shock Properties by X-Ray Thomson Scattering journal April 2012
Measurement of the Adiabatic Index in Be Compressed by Counterpropagating Shocks journal April 2012
Precision Shock Tuning on the National Ignition Facility journal May 2012
Assembly of High-Areal-Density Deuterium-Tritium Fuel from Indirectly Driven Cryogenic Implosions journal May 2012
Direct Measurements of the Ionization Potential Depression in a Dense Plasma journal August 2012
Inelastic X-Ray Scattering from Shocked Liquid Deuterium journal December 2012
X-Ray Scattering Measurements of Strong Ion-Ion Correlations in Shock-Compressed Aluminum journal February 2013
Observations of the Effect of Ionization-Potential Depression in Hot Dense Plasma journal June 2013
Temperature Measurements of Shock Compressed Liquid Deuterium up to 230 GPa journal September 2001
Demonstration of Spectrally Resolved X-Ray Scattering in Dense Plasmas journal May 2003
Observations of Plasmons in Warm Dense Matter journal February 2007
X-ray Thomson scattering in high energy density plasmas journal December 2009
Ultrafast X-ray Thomson Scattering of Shock-Compressed Matter journal October 2008
Dense Astrophysical Plasmas journal April 1991
Interiors of Giant Planets Inside and Outside the Solar System journal October 1999
X-ray scattering as a probe for warm dense mixtures and high-pressure miscibility journal March 2011
The Role of the Laboratory for Laser Energetics in the National Ignition Facility Project journal December 1996

Similar Records

The colliding planar shocks platform to study warm dense matter at the National Ignition Facility
Journal Article · Thu Jun 01 00:00:00 EDT 2023 · Physics of Plasmas · OSTI ID:1984191

X-ray Thomson scattering in warm dense matter at low frequencies
Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print) · OSTI ID:21347432