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  • Blob/hole formation and zonal-flow generation in the edge plasma of the JET tokamak
    Xu, G.S. ...
    The first experimental evidence showing the connection between blob/hole formation and zonal-flow generation was obtained in the edge plasma of the JETtokamak. Holes as well as blobs are observed to ... be born in the edge shear layer, where zonal-flows shear off meso-scale coherent structures, leading to disconnection of positive and negative pressure perturbations. The newly formed blobs transport azimuthal momentum up the gradient of the azimuthal flow and drive the zonal-flow shear while moving outwards. During this processenergy is transferred from the meso-scale coherent structures to the zonal flows via the turbulent Reynolds stress, resulting in nonlinear saturation of edge turbulence and suppression of meso-scale fluctuations. These findings carry significant implications for the mechanism of structure formation in magnetically confined plasma turbulence.
    Source: Nuclear fusion. - ISSN 0029-5515 (Iss. 9, Vol. 49, 2009, 092002-1-092002-8)
    Type of material - article, component part
    Publish date - 2009
    Language - english
    COBISS.SI-ID - 24677415

source: Nuclear fusion. - ISSN 0029-5515 (Iss. 9, Vol. 49, 2009, 092002-1-092002-8)
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