Opacity, Equation of State, and Radiation Transport Model for Moderate Density, eV-Temperature Plasmas
NAVAL RESEARCH LAB WASHINGTON DC
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We present a model suitable for calculating opacity and radiation transport in eV-temperature plasmas such as those encountered in electromagnetic launchers, arcjets, and some types of plasma processing. Using a detailed multilevel, atomic model, the opacity at about 1400 frequency points is calculated for a grid of temperature and electron densities using either the LTE or CRE approximation. This detailed grid is further simplified to 15-20 energy bins within each of which the Planck mean opacity is calculated and stored for use by a radiation transport code. This radiation transport model is a quasi- two-dimensional ray trace at each of these bins suitable for rapid calculation of approximate radiative cooling heating for use in conjunction with a hydrodynamics model. Radiation transport, Electromagnetic launchers, Planck mean opacity, Local thermodynamic equilibrium.
- Plasma Physics and Magnetohydrodynamics