Ion transport barriers triggered by plasma polarization in gyrokinetic simulations

被引：20
|
作者：
Strugarek, A. [1 ,2 ]
Sarazin, Y. [1 ]
Zarzoso, D. [1 ]
Abiteboul, J. [1 ]
Brun, A. S. [2 ]
Cartier-Michaud, T. [1 ]
Dif-Pradalier, G. [1 ]
Garbet, X. [1 ]
Ghendrih, Ph [1 ]
Grandgirard, V. [1 ]
Latu, G. [1 ]
Passeron, C. [1 ]
Thomine, O. [1 ]
机构：
[1] CEA, IRFM, F-13108 St Paul Les Durance, France
[2] Univ Paris Diderot, Lab AIM Paris Saclay, CEA, Irfu,CNRS,INSU, F-91191 Gif Sur Yvette, France
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2013年 / 55卷 / 07期
关键词：
EDGE-LOCALIZED MODES; TURBULENCE SIMULATIONS; IMPROVED CONFINEMENT; SUPPRESSION; ANISOTROPY; PHYSICS; SHEAR; POWER; BETA;
D O I：
10.1088/0741-3335/55/7/074013
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The creation of ion transport barriers by externally induced sheared E x B flows is investigated with the global, full-f and flux-driven gyrokinetic code GYSELA. A gyrokinetic source of vorticity is designed and proves to be efficient in polarizing the plasma. Induced sheared electric fields develop in the turbulent core and are accompanied by the creation of a transport barrier. The barrier and the sheared flow relax quasi-periodically because of zonal flow activity and a destabilizing temperature anisotropy induced by the vorticity source. A new cyclic mechanism leading to the relaxation of transport barriers in tokamaks is discovered.
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页数：9
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