Ion acoustic waves in the presence of high frequency oscillators

Hans Pécseli

    Research output: Book/ReportReportResearch

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    Abstract

    Spatially varying high frequency oscillations will influence the electron motion in plasmas (through ponderomotive forces) and in turn affect the characteristics of ion acoustic oscillations. In this report we derive the dielectric function for long wavelength, low frequency ion acoustic waves in the presence of high frequency, short wavelength oscillations. Apart from reproducing well known results this dielectric function shows the possibility of unstable ion acoustic waves for extreme intensities of high frequency oscillations. It is demonstrated that moderate intensities have a stabilizing effect on linearly unstable double humped ion distribution functions and it is argued that this effect may be of importance in laboratory experiments. Finally we point out some generalisations.
    Original languageEnglish
    Place of PublicationRoskilde, Denmark
    Number of pages18
    ISBN (Print)87-550-0234-8
    Publication statusPublished - 1975
    SeriesRisø-M
    Number1790
    ISSN0418-6435

    Keywords

    • Risø-M-1790

    Cite this

    Pécseli, H. (1975). Ion acoustic waves in the presence of high frequency oscillators. Roskilde, Denmark. Risø-M, No. 1790
    Pécseli, Hans. / Ion acoustic waves in the presence of high frequency oscillators. Roskilde, Denmark, 1975. 18 p. (Risø-M; No. 1790).
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    Pécseli, H 1975, Ion acoustic waves in the presence of high frequency oscillators. Risø-M, no. 1790, Roskilde, Denmark.

    Ion acoustic waves in the presence of high frequency oscillators. / Pécseli, Hans.

    Roskilde, Denmark, 1975. 18 p. (Risø-M; No. 1790).

    Research output: Book/ReportReportResearch

    TY - RPRT

    T1 - Ion acoustic waves in the presence of high frequency oscillators

    AU - Pécseli, Hans

    PY - 1975

    Y1 - 1975

    N2 - Spatially varying high frequency oscillations will influence the electron motion in plasmas (through ponderomotive forces) and in turn affect the characteristics of ion acoustic oscillations. In this report we derive the dielectric function for long wavelength, low frequency ion acoustic waves in the presence of high frequency, short wavelength oscillations. Apart from reproducing well known results this dielectric function shows the possibility of unstable ion acoustic waves for extreme intensities of high frequency oscillations. It is demonstrated that moderate intensities have a stabilizing effect on linearly unstable double humped ion distribution functions and it is argued that this effect may be of importance in laboratory experiments. Finally we point out some generalisations.

    AB - Spatially varying high frequency oscillations will influence the electron motion in plasmas (through ponderomotive forces) and in turn affect the characteristics of ion acoustic oscillations. In this report we derive the dielectric function for long wavelength, low frequency ion acoustic waves in the presence of high frequency, short wavelength oscillations. Apart from reproducing well known results this dielectric function shows the possibility of unstable ion acoustic waves for extreme intensities of high frequency oscillations. It is demonstrated that moderate intensities have a stabilizing effect on linearly unstable double humped ion distribution functions and it is argued that this effect may be of importance in laboratory experiments. Finally we point out some generalisations.

    KW - Risø-M-1790

    M3 - Report

    SN - 87-550-0234-8

    BT - Ion acoustic waves in the presence of high frequency oscillators

    CY - Roskilde, Denmark

    ER -

    Pécseli H. Ion acoustic waves in the presence of high frequency oscillators. Roskilde, Denmark, 1975. 18 p. (Risø-M; No. 1790).