Experimental investigations of the mechanisms of excitation of plasma waves and generation of harmonics in a plasma produced by an intense laser pulse

Aleksandrov, V V; Anisimov, S I; Brenner, M V; Velikhov, E P; Vikharev, V P; Zotov, V P; Koval'skii, N G; Pergament, M I; Yaroslavskii, A I

Title: Experimental investigations of the mechanisms of excitation of plasma waves and generation of harmonics in a plasma produced by an intense laser pulse

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Abstract

The interaction mechanism between laser radiation (lambda=1.06..mu..) and a high-temperature plasma is investigated for light fluxes between 10/sup 12/W/cm/sup 2/ and 4 x 10/sup 14/W/cm/sup 2/. A comparison of the measurement results obtained by various methods indicates that at light fluxes exceeding approx.10/sup 13/W/cm/sup 2/, effective absorption of the radiation is due to the development of decay instabilities t..-->..p+s and t..-->..p+p. It is found that radiation of frequency (3/2) ..omega../sub 0/ emitted by the plasma is due to Raman scattering by the plasma waves with frequencies close to ..omega../sub 0//2. The experimental values of the threshold light fluxed obtained with targets made of various materials are in good agreement with the predictions of the theory.

Authors:: Aleksandrov, V V; Anisimov, S I; Brenner, M V; Velikhov, E P; Vikharev, V P; Zotov, V P; Koval'skii, N G; Pergament, M I; Yaroslavskii, A I

Publication Date:: Mon Nov 01 00:00:00 EST 1976

OSTI Identifier:: 7301908

Resource Type:: Journal Article

Journal Name:: Sov. Phys. - JETP (Engl. Transl.); (United States)

Additional Journal Information:: Journal Volume: 44:5

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LASER-PRODUCED PLASMA; PLASMA WAVES; ABSORPTION; DECAY INSTABILITY; EXCITATION; FREQUENCY DEPENDENCE; LASER RADIATION; RAMAN EFFECT; ELECTROMAGNETIC RADIATION; ENERGY-LEVEL TRANSITIONS; INSTABILITY; PLASMA; PLASMA INSTABILITY; RADIATIONS; 700108* - Fusion Energy- Plasma Research- Wave Phenomena

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                    Aleksandrov, V V, Anisimov, S I, Brenner, M V, Velikhov, E P, Vikharev, V P, Zotov, V P, Koval'skii, N G, Pergament, M I, and Yaroslavskii, A I. Experimental investigations of the mechanisms of excitation of plasma waves and generation of harmonics in a plasma produced by an intense laser pulse.  United States: N. p., 1976. 
        Web.

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                    Aleksandrov, V V, Anisimov, S I, Brenner, M V, Velikhov, E P, Vikharev, V P, Zotov, V P, Koval'skii, N G, Pergament, M I, & Yaroslavskii, A I. Experimental investigations of the mechanisms of excitation of plasma waves and generation of harmonics in a plasma produced by an intense laser pulse.  United States.

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                    Aleksandrov, V V, Anisimov, S I, Brenner, M V, Velikhov, E P, Vikharev, V P, Zotov, V P, Koval'skii, N G, Pergament, M I, and Yaroslavskii, A I. 1976.  
        "Experimental investigations of the mechanisms of excitation of plasma waves and generation of harmonics in a plasma produced by an intense laser pulse".  United States.

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@article{osti_7301908,

  title        = {Experimental investigations of the mechanisms of excitation of plasma waves and generation of harmonics in a plasma produced by an intense laser pulse},

  author       = {Aleksandrov, V V and Anisimov, S I and Brenner, M V and Velikhov, E P and Vikharev, V P and Zotov, V P and Koval'skii, N G and Pergament, M I and Yaroslavskii, A I},

  abstractNote = {The interaction mechanism between laser radiation (lambda=1.06..mu..) and a high-temperature plasma is investigated for light fluxes between 10/sup 12/W/cm/sup 2/ and 4 x 10/sup 14/W/cm/sup 2/. A comparison of the measurement results obtained by various methods indicates that at light fluxes exceeding approx.10/sup 13/W/cm/sup 2/, effective absorption of the radiation is due to the development of decay instabilities t..-->..p+s and t..-->..p+p. It is found that radiation of frequency (3/2) ..omega../sub 0/ emitted by the plasma is due to Raman scattering by the plasma waves with frequencies close to ..omega../sub 0//2. The experimental values of the threshold light fluxed obtained with targets made of various materials are in good agreement with the predictions of the theory.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/7301908},
  journal      = {Sov. Phys. - JETP (Engl. Transl.); (United States)},
number       = ,

  volume       = 44:5,

  place        = {United States},

  year         = {Mon Nov 01 00:00:00 EST 1976},

  month        = {Mon Nov 01 00:00:00 EST 1976}

}

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