Conditional eddies, or clumps, in ion-beam-generated turbulence

Helene Johnsen, H. L. Pecseli, J. Trulsen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Low-frequency electrostatic fluctuations are investigated experimentally in an unmagnetized plasma. The turbulence is generated by ion-ion-beam instabilities. Real-time signals are recorded and investigated statistically on a conditional basis. The formation and propagation of structures with a relatively long lifetime in terms of the average bounce period is observed. Particles bouncing in the potential well associated with these `eddies' will necessarily remain correlated for times determined by the eddy lifetime. The results thus provide evidence for clump formation in plasmas
    Original languageEnglish
    JournalPhysical Review Letters
    Volume55
    Issue number21
    Pages (from-to)2297-2300
    ISSN0031-9007
    DOIs
    Publication statusPublished - 1985

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