Sample Problems

HELIOS is a user-friendly one-dimensional Lagrangian radiation-hydrodynamics code. It conveniently allows users to set and run hydro simulations, and visualize the results. During the setup process, users can specify material properties, equation of state and opacity tables, and initial conditions; select and configure applied energy sources (laser and/or incident radiation field); adjust hydro and radiation control parameters.

While running a simulation, the plasma temperature, density, pressure, and velocity distributions are updated and displayed. If a user wishes, a HELIOS simulation can be aborted prior to its completion, and a new simulation can be restarted with a different set of parameters.

Results from a simulation are written to output files. Plasma properties can be visualized and extracted from a binary output file using HYDROPLOT. Images and detailed spectra can be computed using SPECT3D.

The following sample problems describe setting up and running simulations for:

Planar geometry:

• Laser-heated foil
• Radiation-heated Al foil
• Radiation-driven shock in Al plate

Spherical geometry:

• Radiation-driven capsule implosion
• Laser-driven capsule implosion

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