Invariant Measure and Turbulent Pinch in Tokamaks

M. B. Isichenko, A. V. Gruzinov, P. H. Diamond

    Research output: Contribution to journalArticle

    Abstract

    It is shown that electron transport due to a generic low-frequency electrostatic turbulence in tokamak geometry results in the relaxation to a peaked, self-sustained plasma density profile n0(r), rather than to a diffusion-induced flat distribution. The relaxed density profile depends on the magnetic geometry and the distribution of turbulence. The associated inward pinch velocity Vr=D lnn0 results from the competition of the turbulent diffusion of trapped electrons over the poloidal magnetic flux coordinate ψ and the collisional relaxation toward a Maxwellian distribution function.

    Original languageEnglish (US)
    Pages (from-to)4436-4439
    Number of pages4
    JournalPhysical Review Letters
    Volume74
    Issue number22
    DOIs
    StatePublished - 1995

    Fingerprint

    turbulence
    Maxwell-Boltzmann density function
    turbulent diffusion
    profiles
    geometry
    plasma density
    magnetic flux
    electrons
    distribution functions
    electrostatics
    low frequencies

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Isichenko, M. B., Gruzinov, A. V., & Diamond, P. H. (1995). Invariant Measure and Turbulent Pinch in Tokamaks. Physical Review Letters, 74(22), 4436-4439. https://doi.org/10.1103/PhysRevLett.74.4436

    Invariant Measure and Turbulent Pinch in Tokamaks. / Isichenko, M. B.; Gruzinov, A. V.; Diamond, P. H.

    In: Physical Review Letters, Vol. 74, No. 22, 1995, p. 4436-4439.

    Research output: Contribution to journalArticle

    Isichenko, MB, Gruzinov, AV & Diamond, PH 1995, 'Invariant Measure and Turbulent Pinch in Tokamaks', Physical Review Letters, vol. 74, no. 22, pp. 4436-4439. https://doi.org/10.1103/PhysRevLett.74.4436
    Isichenko, M. B. ; Gruzinov, A. V. ; Diamond, P. H. / Invariant Measure and Turbulent Pinch in Tokamaks. In: Physical Review Letters. 1995 ; Vol. 74, No. 22. pp. 4436-4439.
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