Resonant quasiparticles in plasma turbulence

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Abstract

A general view is proposed on wave propagation in fluids and plasmas where the resonant interaction of monochromatic waves with quasiparticles is considered. A kinetic equation for quasiparticles is used to describe the broadband turbulence interacting with monochromatic waves. Resonant interactions occur when the phase velocity of the long wavelength monochromatic wave is nearly equal to the group velocity of short wavelength wave packets, or quasiparticles, associated with the turbulent spectrum. It is shown that quasiparticle Landau damping can take place, as well as quasiparticle beam instabilities, thus establishing a direct link between short and large wavelength perturbations of the medium. This link is distinct from the usual picture of direct and inverse energy cascades, and it can be used as a different paradigm for the fluid and plasma turbulence theories.
Original languageEnglish
Article number016406
Pages (from-to)164061-164066
Number of pages6
JournalPhysical Review E
Volume68
Issue number12
DOIs
Publication statusPublished - 11 Jul 2003

Keywords

  • damping
  • mathematical models
  • turbulent flow
  • wave propagation
  • turbulent spectrum
  • plasma turbulence

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