The interaction of 1.06 μm laser radiation with high Z disk targets

M. D. Rosen, D. W. Phillion, V. C. Rupert, W. C. Mead, W. L. Kruer, J. J. Thomson, H. N. Kornblum, V. W. Slivinsky, George J Caporaso, M. J. Boyle, K. G. Tirsell

Research output: Contribution to journalArticle

109 Scopus citations

Abstract

Gold disks have been irradiated with 1.06 μm laser light at intensities between 7 × 10 13 and 3 × 10 15 W/cm 2, and pulse lengths between 200 and 1000 psec. Due to the high Z and long pulse, inverse bremsstrahlung becomes an important absorption mechanism and competes strongly with resonance absorption and stimulated scattering. In addition to measured absorptions, data on the temporal, spatial, angular, and spectral characteristics of the x-ray emission are presented. Temporally and spectrally resolved back-reflected light, and polarization-dependent sidescattered light are detected, providing estimates for the amount of stimulated scattering and of the coronal electron temperature. Inhibited electron thermal conduction and nonlocal thermodynamic equilibrium ionization physics play key roles in bringing numerical simulations of these experiments into agreement with all of the above-mentioned data.

Original languageEnglish (US)
Pages (from-to)2020-2031
Number of pages12
JournalPhysics of Fluids
Volume22
Issue number10
StatePublished - 1979
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Mechanics of Materials
  • Computational Mechanics
  • Fluid Flow and Transfer Processes

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