skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., Princeton, NJ (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
751257
Report Number(s):
PPPL-3437
TRN: US0000898
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 15 Feb 2000
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; TURBULENCE; ION TEMPERATURE; PLASMA DRIFT; TRANSPORT THEORY; PLASMA SIMULATION; THREE-DIMENSIONAL CALCULATIONS; TEMPERATURE GRADIENTS; DAMPING; PLASMA INSTABILITY

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:10.2172/751257.
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:10.2172/751257.
Lin, Z., Hahm, T.S., Lee, W.W., Tang, W.M., and White, R.B. Tue . "Gyrokinetic simulations in general geometry and applications to collisional damping of zonal flows". United States. doi:10.2172/751257. https://www.osti.gov/servlets/purl/751257.
@article{osti_751257,
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.},
doi = {10.2172/751257},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {2}
}