Intensity dependent waiting time for strong electron trapping events in speckle stimulated raman scatter

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The onset of Stimulated Raman scatter from an intense laser speckle is the simplest experimentally realizable laser-plasma-interaction environment. Despite this data and recent 3D particle simulations, the controlling mechanism at the onset of backscatter in the kinetic regime when strong electron trapping in the daughter Langmuir wave is a dominant nonlinearity is not understood. This paper explores the consequences of assuming that onset is controlled by large thermal fluctuations. A super exponential dependence of mean reflectivity on speckle intensity in the onset regime is predicted.

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Rose, Harvey; Daughton, W & Yin, L January 1, 2009.

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The onset of Stimulated Raman scatter from an intense laser speckle is the simplest experimentally realizable laser-plasma-interaction environment. Despite this data and recent 3D particle simulations, the controlling mechanism at the onset of backscatter in the kinetic regime when strong electron trapping in the daughter Langmuir wave is a dominant nonlinearity is not understood. This paper explores the consequences of assuming that onset is controlled by large thermal fluctuations. A super exponential dependence of mean reflectivity on speckle intensity in the onset regime is predicted.

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  • Journal Name: Physics of Plasmas

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  • Report No.: LA-UR-09-00697
  • Report No.: LA-UR-09-697
  • Grant Number: AC52-06NA25396
  • Office of Scientific & Technical Information Report Number: 956379
  • Archival Resource Key: ark:/67531/metadc929138

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 2009

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 3:58 p.m.

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Rose, Harvey; Daughton, W & Yin, L. Intensity dependent waiting time for strong electron trapping events in speckle stimulated raman scatter, article, January 1, 2009; [New Mexico]. (digital.library.unt.edu/ark:/67531/metadc929138/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.