Raman forward scattering of chirped laser pulses

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Raman scattering of a high-intensity, short duration, frequency-chirped laser pulse propagating in an underdense plasma is examined. The growth of the direct forward scattered light is calculated for a laser pulse with a linear frequency chirp in various spatio-temporal regimes. This includes a previously undescribed regime of strongly-coupled four-wave nonresonant interaction, which is important for relativistic laser intensities. In all regimes of forward scattering, it is shown that the growth rate increases (decreases) for positive (negative) frequency chirp. The effect of chirp on the growth rate is relatively minor, i.e., a few percent chirp yields few percent changes in the ... continued below

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Schroeder, C.B.; Esarey, E.; Shadwick, B.A. & Leemans, W.P. December 5, 2002.

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Raman scattering of a high-intensity, short duration, frequency-chirped laser pulse propagating in an underdense plasma is examined. The growth of the direct forward scattered light is calculated for a laser pulse with a linear frequency chirp in various spatio-temporal regimes. This includes a previously undescribed regime of strongly-coupled four-wave nonresonant interaction, which is important for relativistic laser intensities. In all regimes of forward scattering, it is shown that the growth rate increases (decreases) for positive (negative) frequency chirp. The effect of chirp on the growth rate is relatively minor, i.e., a few percent chirp yields few percent changes in the growth rates. Numerical solutions based on fully nonlinear cold Maxwell-fluid model are presented which confirm analytical predictions. Relation of these results to recent experiments is discussed.

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  • Journal Name: Physics of Plasmas; Journal Volume: 10; Journal Issue: 1; Other Information: Journal Publication Date: January 2003

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  • Report No.: LBNL--50729
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 808921
  • Archival Resource Key: ark:/67531/metadc738362

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 5, 2002

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  • Oct. 18, 2015, 6:40 p.m.

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  • Sept. 1, 2016, 7:14 p.m.

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Schroeder, C.B.; Esarey, E.; Shadwick, B.A. & Leemans, W.P. Raman forward scattering of chirped laser pulses, article, December 5, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc738362/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.