Comments on the simulation of radiative transfer in laser compression experiments

Details Comments on the simulation of radiative transfer in laser compression experiments Comments on the simulation of radiative transfer in laser compression experiments

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jqsrt..27..243l&link_type=abstract

(Conference on Radiative Properties of Hot Dense Matter, Monterey, CA, Nov. 17-20, 1980.) Journal of Quantitative Spectroscopy a

Mathematics

3

Computerized Simulation, Dense Plasmas, Emission Spectra, High Temperature Plasmas, Laser Plasmas, Plasma Control, Radiative Transfer, Atmospheric Models, Implosions, Iterative Solution, Mathematical Models, Plasma Diagnostics, Self Consistent Fields, Stellar Atmospheres, Ultraviolet Radiation

Scientific paper

Numerical modeling of the emission spectra of a dense, hot, spherically symmetric plasma containing experimentally-controlled elements is discussed. Time dependent radiative transfer (TDRT) models are explored in terms of rate equations, the radiation transfer equation, diffusion models, approximate non-LTE (linear transfer of energy) models, and spectral methods. Time independent models are employed if all radiative rates are small compared to the hydrodynamic time scales. Steps for an iteration process which accounts for the UV emission are described, noting difficulties in obtaining convergence in self-consistent fields. The iterations can be as successful, however, as the radiation transfer models used to reproduce the fields around stellar atmospheres. Further difficulties in establishing accurate TDRT models are indicated for simulating systems of multilevel atoms, detailing the target-laser interaction, and choosing initial plasma conditions.

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