Microturbulence in DIII-D tokamak pedestal. IV. Electrostatic turbulent transport | Zendy

Xuhe Liao | Zendy; Zhihong Lin | Zendy; I. Holod | Zendy; Bo Li | Zendy; Guoya Sun | Zendy

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Microturbulence in DIII-D tokamak pedestal. IV. Electrostatic turbulent transport

Author(s) -

Xuhe Liao,

Zhihong Lin,

I. Holod,

Bo Li,

Guoya Sun

Publication year - 2016

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 - 10.1063/1.4972080

Subject(s) - microturbulence , pedestal , physics , diii d , turbulence , tokamak , plasma , amplitude , atomic physics , jet (fluid) , mechanics , computational physics , optics , nuclear physics , archaeology , history

Gyrokinetic simulations of electrostatic microturbulence in the edge plasmas of DIII-D shot 131997 find that the geodesic acoustic mode (GAM) is generated after nonlinear saturation both at the pedestal top and in the peak gradient region, and in turn, regulates the turbulence in both regions. Collisions significantly reduce the GAM amplitude and the associated GAM modulation of the turbulence in both regions. Collisions have little effects on the ion temperature gradient turbulent transport level at the pedestal top. On the other hand, collisional damping of the TEM significantly reduces the turbulent transport level in the peak gradient region.

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