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

Journal Article · Mon May 01 04:00:00 EDT 2000 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.874008· OSTI ID:20216054

Lin, Z ^[1]; Hahm, T S ^[1]; Lee, W W ^[1]; Tang, W M ^[1]; White, R B ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton University, P. O. Box 451, Princeton, New Jersey 08543 (United States)

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.

• OSTI ID: 20216054
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 7; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARGED-PARTICLE TRANSPORT
DAMPING
GEOMETRY
ION-ION COLLISIONS
KINETIC EQUATIONS
MAGNETIC CONFINEMENT
PLASMA CONFINEMENT
PLASMA INSTABILITY
PLASMA PRESSURE
PLASMA SIMULATION
THEORETICAL DATA
TURBULENCE