Relativistic Raman instability shifted by half-plasma frequency

G. Shvets; N. J. Fisch; J. M. Rax

doi:10.1063/1.871766

Relativistic Raman instability shifted by half-plasma frequency

G. Shvets, N. J. Fisch, J. M. Rax

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5 Scopus citations

Abstract

A new nonlinear Raman instability in underdense plasma is investigated theoretically. Unlike the usual linear Raman instabilities which grow exponentially in time, this instability takes a finite amount of time to diverge. The explosion time t_∞, depends on the initial level of the perturbation. A general set of equations for spatio-temporal evolution of the forward nonlinear Raman scattering is derived and its temporal evolution is studied in detail. This new instability results in the generation of forward Raman radiation shifted by half the plasma frequency for laser intensities of order or exceeding 10¹⁸ W/cm², something that has been recently observed [A. Modena (private communication, 1995)].

Original language	English (US)
Pages (from-to)	1109-1112
Number of pages	4
Journal	Physics of Plasmas
Volume	3
Issue number	3
DOIs	https://doi.org/10.1063/1.871766
State	Published - Mar 1996

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/1.871766

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title = "Relativistic Raman instability shifted by half-plasma frequency",

abstract = "A new nonlinear Raman instability in underdense plasma is investigated theoretically. Unlike the usual linear Raman instabilities which grow exponentially in time, this instability takes a finite amount of time to diverge. The explosion time t∞, depends on the initial level of the perturbation. A general set of equations for spatio-temporal evolution of the forward nonlinear Raman scattering is derived and its temporal evolution is studied in detail. This new instability results in the generation of forward Raman radiation shifted by half the plasma frequency for laser intensities of order or exceeding 1018 W/cm2, something that has been recently observed [A. Modena (private communication, 1995)].",

author = "G. Shvets and Fisch, {N. J.} and Rax, {J. M.}",

year = "1996",

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doi = "10.1063/1.871766",

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AU - Shvets, G.

AU - Fisch, N. J.

AU - Rax, J. M.

PY - 1996/3

Y1 - 1996/3

N2 - A new nonlinear Raman instability in underdense plasma is investigated theoretically. Unlike the usual linear Raman instabilities which grow exponentially in time, this instability takes a finite amount of time to diverge. The explosion time t∞, depends on the initial level of the perturbation. A general set of equations for spatio-temporal evolution of the forward nonlinear Raman scattering is derived and its temporal evolution is studied in detail. This new instability results in the generation of forward Raman radiation shifted by half the plasma frequency for laser intensities of order or exceeding 1018 W/cm2, something that has been recently observed [A. Modena (private communication, 1995)].

AB - A new nonlinear Raman instability in underdense plasma is investigated theoretically. Unlike the usual linear Raman instabilities which grow exponentially in time, this instability takes a finite amount of time to diverge. The explosion time t∞, depends on the initial level of the perturbation. A general set of equations for spatio-temporal evolution of the forward nonlinear Raman scattering is derived and its temporal evolution is studied in detail. This new instability results in the generation of forward Raman radiation shifted by half the plasma frequency for laser intensities of order or exceeding 1018 W/cm2, something that has been recently observed [A. Modena (private communication, 1995)].

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Relativistic Raman instability shifted by half-plasma frequency

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