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White-light parametric instabilities in plasmas

Bingham, R. and Santos, J.E. and Silva, L.O. (2007) White-light parametric instabilities in plasmas. Physical Review Letters, 98. ISSN 0031-9007

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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.

Item type: Article
ID code: 5109
Keywords: plasmas, physics, white light, radiation, raman equations, Plasma physics. Ionized gases, Physics and Astronomy(all)
Subjects: Science > Physics > Plasma physics. Ionized gases
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 08 Jan 2008
    Last modified: 04 Sep 2014 17:35
    URI: http://strathprints.strath.ac.uk/id/eprint/5109

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