Relativistic Raman instability shifted by half-plasma frequency

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Description

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 diverse. The explosion time t{sub {infinity}} depends on the initial level of the perturbation. A general set of equations for spatio-temporal evolution of the forward non-linear 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 10{sup 18}W/cm{sup 2}, something that has been ... continued below

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11 p.

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Shvets, G.; Fisch, N.J. & Rax, J.M. January 1, 1996.

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Description

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 diverse. The explosion time t{sub {infinity}} depends on the initial level of the perturbation. A general set of equations for spatio-temporal evolution of the forward non-linear 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 10{sup 18}W/cm{sup 2}, something that has been recently observed.

Physical Description

11 p.

Notes

INIS; OSTI as DE96007494

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  • Other Information: PBD: Jan 1996

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  • Other: DE96007494
  • Report No.: PPPL--3166
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/206588 | External Link
  • Office of Scientific & Technical Information Report Number: 206588
  • Archival Resource Key: ark:/67531/metadc667547

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • April 15, 2016, 7:09 p.m.

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Shvets, G.; Fisch, N.J. & Rax, J.M. Relativistic Raman instability shifted by half-plasma frequency, report, January 1, 1996; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc667547/: accessed January 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.