White-light parametric instabilities in plasmas

R. Bingham, J.E. Santos, L.O. Silva

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13 Citations (Scopus)


Parametric instabilities driven by partially coherent radiation in plasmas are described by a generalized statistical Wigner-Moyal set of equations, formally equivalent to the full wave equation, coupled to the plasma fluid equations. A generalized dispersion relation for stimulated Raman scattering driven by a partially coherent pump field is derived, revealing a growth rate dependence, with the coherence width sigma of the radiation field, scaling with 1/sigma for backscattering (three-wave process), and with 1/sigma1/2 for direct forward scattering (four-wave process). Our results demonstrate the possibility to control the growth rates of these instabilities by properly using broadband pump radiation fields.
Original languageEnglish
JournalPhysical Review Letters
Publication statusPublished - 2007


  • plasmas
  • physics
  • white light
  • radiation
  • raman equations

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