Opacity, Equation of State, and Radiation Transport Model for Moderate Density, eV-Temperature Plasmas

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Sep 22, 1992
Accession Number
ADA256056

Entities

People

  • John L. Giuliani Jr.
  • John P. Apruzese
  • Paul C. Kepple

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Coefficients
  • Electromagnetic Guns
  • Electron Density
  • Electrons
  • Equations
  • Frequency
  • Geometry
  • Ground State
  • Hydrodynamics
  • Ion Density
  • Launchers
  • Physics
  • Radiation
  • Radiative Transfer
  • Transport Ships
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Marine Ecotoxicology
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Microelectronics