White-light parametric instabilities in plasmas

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

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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.
LanguageEnglish
JournalPhysical Review Letters
Volume98
DOIs
Publication statusPublished - 2007

Fingerprint

radiation distribution
pumps
coherent radiation
forward scattering
wave equations
backscattering
Raman spectra
broadband
scaling
fluids

Keywords

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

Cite this

Bingham, R. ; Santos, J.E. ; Silva, L.O. / White-light parametric instabilities in plasmas. In: Physical Review Letters. 2007 ; Vol. 98.
@article{23d101a46c5b411799b24e5b6baef847,
title = "White-light parametric instabilities in plasmas",
abstract = "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.",
keywords = "plasmas, physics, white light, radiation, raman equations",
author = "R. Bingham and J.E. Santos and L.O. Silva",
year = "2007",
doi = "10.1103/PhysRevLett.98.235001",
language = "English",
volume = "98",
journal = "Physical Review Letters",
issn = "0031-9007",

}

White-light parametric instabilities in plasmas. / Bingham, R.; Santos, J.E.; Silva, L.O.

In: Physical Review Letters, Vol. 98, 2007.

Research output: Contribution to journalArticle

TY - JOUR

T1 - White-light parametric instabilities in plasmas

AU - Bingham, R.

AU - Santos, J.E.

AU - Silva, L.O.

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

KW - plasmas

KW - physics

KW - white light

KW - radiation

KW - raman equations

UR - http://dx.doi.org/10.1103/PhysRevLett.98.235001

U2 - 10.1103/PhysRevLett.98.235001

DO - 10.1103/PhysRevLett.98.235001

M3 - Article

VL - 98

JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

ER -