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

Abstract

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.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Princeton Plasma Physics Laboratory, Princeton University, P. O. Box 451, Princeton, New Jersey 08543 (United States)
Publication Date:
OSTI Identifier:
20216054
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DAMPING; GEOMETRY; PLASMA SIMULATION; TURBULENCE; CHARGED-PARTICLE TRANSPORT; KINETIC EQUATIONS; ION-ION COLLISIONS; PLASMA INSTABILITY; PLASMA PRESSURE; MAGNETIC CONFINEMENT; PLASMA CONFINEMENT; THEORETICAL DATA

Citation Formats

Lin, Z., Hahm, T. S., Lee, W. W., Tang, W. M., and White, R. B. Gyrokinetic simulations in general geometry and applications to collisional damping of zonal flows. United States: N. p., 2000. Web. doi:10.1063/1.874008.
Lin, Z., Hahm, T. S., Lee, W. W., Tang, W. M., & White, R. B. Gyrokinetic simulations in general geometry and applications to collisional damping of zonal flows. United States. doi:10.1063/1.874008.
Lin, Z., Hahm, T. S., Lee, W. W., Tang, W. M., and White, R. B. Mon . "Gyrokinetic simulations in general geometry and applications to collisional damping of zonal flows". United States. doi:10.1063/1.874008.
@article{osti_20216054,
title = {Gyrokinetic simulations in general geometry and applications to collisional damping of zonal flows},
author = {Lin, Z. and Hahm, T. S. and Lee, W. W. and Tang, W. M. and White, R. B.},
abstractNote = {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.},
doi = {10.1063/1.874008},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 7,
place = {United States},
year = {2000},
month = {5}
}