Interplay between Gyrokinetic Turbulence, Flows, and Collisions: Perspectives on Transport and Poloidal Rotation

被引：57

作者：

Dif-Pradalier, G. ^{[1
,2
]}

Grandgirard, V. ^{[2
]}

Sarazin, Y. ^{[2
]}

Garbet, X. ^{[2
]}

Ghendrih, Ph. ^{[2
]}

机构：

[1] CEA IRFM, Assoc Euratom CEA, F-13108 St Paul Les Durance, France

[2] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 06期

关键词：

ION THERMAL-CONDUCTIVITY; BANANA REGIME; DYNAMICS; TRANSITION; PARADIGM; TOKAMAKS; PLASMA;

D O I：

10.1103/PhysRevLett.103.065002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The impact of ion-ion collisions on confinement is investigated with the full-f and global gyrokinetic Gysela code through a series of nonlinear turbulence simulations for tokamak parameters. A twofold scan in the turbulence drive and in collisionality is performed, highlighting (i) a heat transport expressed in terms of critical quantities-threshold and exponent, (ii) a first evidence of turbulent generation of poloidal momentum, and (iii) the dominance of mean flow shear, mediated through the turbulent corrugation of the mean profiles, with regard to the oft-invoked zonal flow shear.

引用

页数：4

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