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Retaining space and time coherence in radiative transfer models.

J Rosato1

  • 1Aix-Marseille Université, CNRS, PIIM UMR 7345, F-13397 Marseille Cedex 20, France.

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Summary
This summary is machine-generated.

This study extends radiative transfer models to include temporal coherence, impacting atomic line spectra formation. The new model is illustrated with Lyman-alpha radiation transport in plasma.

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Area of Science:

  • Plasma Physics
  • Atomic Spectroscopy
  • Radiative Transfer Theory

Background:

  • Existing radiative transfer models often neglect temporal coherence effects.
  • Understanding coherence is crucial for accurate atomic line spectra formation.

Purpose of the Study:

  • To extend a spatial coherence model for radiative transfer to incorporate temporal coherence.
  • To investigate the combined effects of spatial and temporal coherence on atomic line spectra.
  • To apply the extended model to Lyman-alpha radiation transport in divertor plasma.

Main Methods:

  • Utilizing Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy techniques.
  • Developing a formalism that retains temporal coherence alongside spatial coherence.
  • Performing calculations for optically thick divertor plasma conditions.

Main Results:

  • Demonstrated that both spatial and temporal coherence significantly influence atomic line spectra formation.
  • Successfully applied the model to Lyman-alpha radiation transport in relevant plasma scenarios.
  • The extended model provides a more comprehensive description of radiative processes.

Conclusions:

  • The inclusion of temporal coherence offers a more complete understanding of radiative transfer in plasmas.
  • The BBGKY hierarchy approach is effective for modeling complex coherence effects.
  • The model has potential applications in dense media and links to partial frequency redistribution.