Up-gradient particle flux in a drift wave-zonal flow system | Zendy

Lang Cui | Zendy; George Tynan | Zendy; P. H. Diamond | Zendy; Saikat Chakraborty Thakur | Zendy; C. Brandt | Zendy

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Up-gradient particle flux in a drift wave-zonal flow system

Author(s) -

Lang Cui,

George Tynan,

P. H. Diamond,

Saikat Chakraborty Thakur,

C. Brandt

Publication year - 2015

Publication title -

physics of plasmas

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.75

H-Index - 160

eISSN - 1089-7674

pISSN - 1070-664X

DOI - 10.1063/1.4921671

Subject(s) - physics , density gradient , turbulence , flux (metallurgy) , mechanics , plasma , zonal flow (plasma) , particle (ecology) , saturation (graph theory) , computational physics , tokamak , nuclear physics , oceanography , materials science , metallurgy , geology , mathematics , quantum mechanics , combinatorics

We report a net inward, up-gradient turbulent particle flux in a cylindrical plasma when collisional drift waves generate a sufficiently strong sheared azimuthal flow that drives positive (negative) density fluctuations up (down) the background density gradient, resulting in a steepening of the mean density gradient. The results show the existence of a saturation mechanism for drift-turbulence driven sheared flows that can cause up-gradient particle transport and density profile steepening.

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