Analysis of chaos in plasma turbulence

T.S. Pedersen, Poul Michelsen, J. Juul Rasmussen

    Research output: Contribution to journalJournal articleResearch

    Abstract

    A two-dimensional slab model for resistive drift waves in plasmas consisting of two coupled nonlinear partial differential equations for the density perturbation n and the electrostatic potential perturbation phi is investigated. The drift waves are linearly unstable, and a quasi-stationary turbulent state is reached in a finite time, independent of the initial conditions. Different regimes of the turbulent state can be obtained by varying the coupling parameter C, related to the parallel electron dynamics. The turbulence is described by using particle tracking and tools from chaos analysis. The largest Lyapunov exponent lambda(1) is calculated for different values of C to quantify the chaoticity and compared with Lagrangian inverse time scales obtained by tracking virtual fluid particles.
    Original languageEnglish
    JournalPhysica Scripta
    VolumeT67
    Pages (from-to)30-32
    ISSN0281-1847
    DOIs
    Publication statusPublished - 1996
    EventInternational Conference on Complex Dynamics in Spatially Extended Systems - Niels Bohr Instituttet, Copenhagen, Denmark
    Duration: 26 Sep 199529 Sep 1995

    Conference

    ConferenceInternational Conference on Complex Dynamics in Spatially Extended Systems
    LocationNiels Bohr Instituttet
    Country/TerritoryDenmark
    CityCopenhagen
    Period26/09/199529/09/1995
    SponsorNiels Bohr Institute, Technical University of Denmark

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