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

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

    Research output: Contribution to journalJournal articleResearchpeer-review


    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
    Issue number21
    Pages (from-to)2297-2300
    Publication statusPublished - 1985


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