HELIOS

Major Features of HELIOS and HELIOS-CR

  • Performs 1-D simulations for planar, cylindrical, and spherical plasmas.
  • Updates energy and momentum conservation equations in a Lagrangian reference frame (i.e., grid moves with fluid).
  • Energy equations solved for either one-temperature (Tion = Telec) or two-temperature (separate Tion and Telec) plasmas.
  • Includes an easy-to-use graphical user interface for problem setup and monitoring simulation progress.
  • Includes a graphics application HydroPLOT for visualizing results:
      • Viewing results as line plots, 2-D color contours, 3-D surface plots
      • Editing and saving plot settings
      • Copying and pasting plots into MS Office applications
  • Plasma thermal conduction is performed, with electron conduction being flux-limited, using:
      • Spitzer conductivity
      • SESAME-formatted tabular conductivity
      • A user-specified (constant) conductivity
      • A mixture of Spitzer and constant conductivities
  • Includes energy deposition models for:
      • Laser deposition
      • MHD effects (cylindrical geom. only)
      • External radiation sources
  • Radiation transport for multiple photon energy groups is computed using one of the following models:
      • Flux-limited radiation diffusion
      • Multi-angle short characteristics (planar geometry only)
  • Supports use of SESAME equation of state (EOS), thermal conductivity, and electrical resistivity data.
  • Supports use of PRism OPACity and EOS (PROPACEOS) data.
  • Includes option to calculate fusion product yields and rates.
  • Includes the following atomic processes in collisional-radiative modeling: **
      • Collisional ionization, recombination, excitation, and deexcitation
      • Photoionization and stimulated recombination
      • Photoionization and stimulated emission
      • Spontaneous decay
      • Radiative recombination
      • Dielectronic recombination, autoionization, and electron capture
  • Utilizes ATBASE atomic database for supplying: **
      • Photoionization cross-sections
      • Oscillator strengths
      • Collisional ionization cross-sections
      • Collisional excitation cross-sections
      • Atomic level energies and transition energies
      • Dielectronic recombination, autoionization, and electron capture rates
  • Interfaces with other Prism applications:
      • SPECT3D: for generating spectra and images based on radiation-hydrodynamics results to compare with experimental spectral and imaging data
      • HydroPLOT: a graphics tool for viewing calculation results
      • VISRAD: for generating input files for time- and frequency-dependent external radiation sources

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    ** HELIOS-CR application only