EOS Workshop

31 May – 2 June 2017

Equation-of-state (EOS), providing the pressure and internal energy as a function of the material density and temperature, is of fundamental importance for high-energy-density (HED) plasma science. It is essentially required to close radiation-hydrodynamics equations for HED plasma simulations in a wide range of density/temperature conditions. Historically, a variety of EOS models have been built and implemented into different rad-hydro-codes for HED applications. These EOS models, normally constrained by limited experimental data, often encounter difficulties in the warm-dense plasma regime in which strong-coupling and electron degeneracy play a significant role in determining the plasma properties. The uncertainty among various EOS models, on the level of ~10% and above, could have significant consequences for inertial-confinement fusion (ICF) target designs and for the interpretation of HED experiments. Establishing a forum to examining the various EOS models and benchmarking them with existing/future experiments is especially important for understanding and designing ICF/HED experiments.   

 

Workshop Goals    

 

While great advances in theoretical EOS studies are underway through first-principles (QMD, QMC, and PIMC) calculations, this workshop will focus on comparisons of EOS models implemented in various hydrodynamic codes with available experimental data and first-principles EOS calculations. The intent is to help establish the present status of EOS understanding for materials closely relevant to ICF and HED experiments. It will address both the theoretical approaches used in current EOS studies and the various experimental platforms for accurate EOS measurements. Specific goals include:

  • To compare the state-of-the-art EOS calculations, EOS measurements, and various EOS models used in radiation-hydrodynamics codes
  • To quantify uncertainties in these EOS models/calculations/measurements and to examine their self-consistence with other properties such as opacity and transport
  • To identify the most reliably EOS data for ICF/HED hydro-simulation community to use
  • To facilitate future EOS experiments for inertial confinement fusion and high energy density science
  • To advance theory and computational methods for EOS studies

 

Cases for EOS Data Submission [reporting the principal Hugoniont, pressure, energy, g(r),…]

  • Deuterium @ 0.1, 1.0, 10.0, 100.0, 1000.0 g/cc & T = 1.0, 10.0, 100.0, 1000.0-eV
  • Beryllium @  0.1, 1.0, 10.0, 100.0, 1000.0 g/cc & T = 1.0, 10.0, 100.0, 1000.0-eV
  • Carbon @ 0.1, 1.0, 10.0, 100.0, 1000.0 g/cc & T = 1.0, 10.0, 100.0, 1000.0-eV
  • CH @ 0.1, 1.0, 10.0, 100.0, 1000.0 g/cc & T = 1.0, 10.0, 100.0, 1000.0-eV

 

Proposed topics & schedules:

  • Wednesday Morning: Talks on the various EOS models (SESAME, LEOS, QEOS,….) currently used in radiation-hydrodynamics codes
  • Wednesday Afternoon: Talks on the current EOS calculations (QMD, PIMC, QMC, AA, various models,...)
  • Thursday Morning: EOS experiments (existing & future)
  • Thursday Afternoon: EOS comparisons among models/calculations/experiments (Deuterium & Beryllium Cases )
  • Friday Morning: EOS comparisons among models/calculations/experiments (Carbon & CH Cases )
  • Friday Afternoon: Wrap-up with future directions for EOS experiments and theories

 

Foreign National Attendance   

 

All visits of foreign nationals must be approved through the U.S. Department of Energy Foreign Visit and Assignment System. As such, we will need to have all attendees verify their citizenship at the time of registration. Foreign Nationals must be processed through the system no later than 1 March 2017.