Gyrokinetic simulations in general geometry and applications to collisional damping of zonal flows

被引:75
作者
Lin, Z [1 ]
Hahm, TS [1 ]
Lee, WW [1 ]
Tang, WM [1 ]
White, RB [1 ]
机构
[1] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA
关键词
D O I
10.1063/1.874008
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
A fully three-dimensional gyrokinetic particle code using magnetic coordinates for general geometry has been developed and applied to the investigation of zonal flows dynamics in toroidal ion-temperature-gradient turbulence. Full torus simulation results support the important conclusion that turbulence-driven zonal flows significantly reduce the turbulent transport. Linear collisionless simulations for damping of an initial poloidal flow perturbation exhibit an asymptotic residual flow. The collisional damping of this residual causes the dependence of ion thermal transport on the ion-ion collision frequency, even in regimes where the instabilities are collisionless. (C) 2000 American Institute of Physics. [S1070-664X(00)94705-0].
引用
收藏
页码:1857 / 1862
页数:6
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