Evolution of Modulated Dispersive Electron Waves in a Plasma

H. Sugai, Jens-Peter Lynov, Poul Michelsen, H. L. Pécseli, Jens Juul Rasmussen

    Research output: Contribution to journalJournal articleResearchpeer-review


    The linear propagation of amplitude-modulated electron waves was examined in a low-density Q-machine plasma. Three effects of the strong dispersion on the modulated wave have been demonstrated: (i) a wavepacket expands along its direction of propagation, followed by a shift of the frequency through the wavepacket, (ii) the number of oscillations in the temporally observed packet is not identical with that in the spatially observed packet and (iii) continuously modulated waves exhibit recurrence of modulation. The experimental results agree with both a simple analysis based on the Schrodinger equation and a direct numerical calculation.
    Original languageEnglish
    JournalPlasma Physics and Controlled Fusion
    Issue number8
    Pages (from-to)701-712
    Publication statusPublished - 1979


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