Microturbulence in DIII-D tokamak pedestal. III. Effects of collisions | Zendy

Xuhe Liao | Zendy; Zhihong Lin | Zendy; I. Holod | Zendy; Yong Xiao | Zendy; Bo Li | Zendy; P.B. Snyder | Zendy

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Microturbulence in DIII-D tokamak pedestal. III. Effects of collisions

Author(s) -

Xuhe Liao,

Zhihong Lin,

I. Holod,

Yong Xiao,

Bo Li,

P.B. Snyder

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 - 10.1063/1.4972079

Subject(s) - diii d , microturbulence , pedestal , physics , ballooning , tokamak , toroid , atomic physics , plasma , nuclear physics , archaeology , history

Gyrokinetic simulations of the H-mode pedestal in DIII-D discharge 145701 find that the kinetic ballooning mode (KBM) is the most unstable mode for low toroidal numbers (n ≤ 25) and that the trapped electron mode (TEM) dominates over the KBM at higher toroidal mode numbers for realistic pressure gradients in the pedestal. Collisions reduce the TEM growth rate but have little effects on the KBM. KBM has the conventional ballooning mode structure peaking at the outer mid-plane, while TEM has an unconventional mode structure peaking at the top and bottom of the poloidal plane.

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