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Study of K absorption structures in a subcritical-density laser-produced plasma

  • C. A. Back
  • , C. Chenais-Popovics
  • , P. Renaudin
  • , J. P. Geindre
  • , P. Audebert
  • , J. C. Gauthier
  • LPP

Research output: Contribution to journalArticlepeer-review

Abstract

The study of K line absorption by point-projection backlighting is presented for a laser-produced aluminum plasma at electronic densities below 5×1021 cm-3. The appearance of ionic species as a function of distance from the target is measured absolutely by the use of a knife edge as a spatial fiducial. These data are used to determine the gradient of the average charge as a function of space. A non-local-thermodynamic-equilibrium ionization model has been developed to determine temperature and densities consistent with this measure. Comparisons with hydrodynamic codes are presented, along with a discussion of the inferred temperature.

Original languageEnglish
Pages (from-to)3405-3412
Number of pages8
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume46
Issue number6
DOIs
Publication statusPublished - 1 Jan 1992
Externally publishedYes

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