Observation of multiple mechanisms for stimulating ion waves in ignition scale plasmas

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The laser and plasma conditions expected in ignition experiments using indirect drive inertial confinement have been studied experimentally. It has been found that there are at least three ways in which ion waves can be stimulated in these plasmas and have significant effect on the energy balance and distribution in the target. First ion waves can be stimulated by a single laser beam by the process of Stimulated Brillouin Scattering (SBS) in which an ion acoustic and a scattered electromagnetic wave grow from noise. Second, in a plasma where more than one beam intersect, ion waves can be excited at ... continued below

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47 p.

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Kirkwood, R.K.; MacGowan, B.J. & Montgomery, D.S. November 1, 1996.

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The laser and plasma conditions expected in ignition experiments using indirect drive inertial confinement have been studied experimentally. It has been found that there are at least three ways in which ion waves can be stimulated in these plasmas and have significant effect on the energy balance and distribution in the target. First ion waves can be stimulated by a single laser beam by the process of Stimulated Brillouin Scattering (SBS) in which an ion acoustic and a scattered electromagnetic wave grow from noise. Second, in a plasma where more than one beam intersect, ion waves can be excited at the `beat` frequency and wave number of the intersecting beams, causing the side scatter instability to be seeded, and substantial energy to be transferred between the beams [R. K. Kirkwood et. al. Phys. Re0319v. Lett. 76, 2065 (1996)]. And third, ion waves may be stimulated by the decay of electron plasma waves produced by Stimulated Raman Scattering (SRS), thereby inhibiting the SRS process [R. K. Kirkwood et. al. Phys. Rev. Lett. 77, 2706 (1996)].

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47 p.

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INIS; OSTI as DE97052114

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  • Meeting of the Division of Plasma Physics of the American Physical Society, Denver, CO (United States), 11-15 Nov 1996

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  • Other: DE97052114
  • Report No.: UCRL-JC--124651
  • Report No.: CONF-961102--10
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 321860
  • Archival Resource Key: ark:/67531/metadc674673

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  • November 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 23, 2016, 3:09 p.m.

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Kirkwood, R.K.; MacGowan, B.J. & Montgomery, D.S. Observation of multiple mechanisms for stimulating ion waves in ignition scale plasmas, article, November 1, 1996; California. (digital.library.unt.edu/ark:/67531/metadc674673/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.