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Title: Gyrokinetic Simulation of Global Turbulent Transport Properties in Tokamak Experiments

Abstract

A general geometry gyro-kinetic model for particle simulation of plasma turbulence in tokamak experiments is described. It incorporates the comprehensive influence of noncircular cross section, realistic plasma profiles, plasma rotation, neoclassical (equilibrium) electric fields, and Coulomb collisions. An interesting result of global turbulence development in a shaped tokamak plasma is presented with regard to nonlinear turbulence spreading into the linearly stable region. The mutual interaction between turbulence and zonal flows in collisionless plasmas is studied with a focus on identifying possible nonlinear saturation mechanisms for zonal flows. A bursting temporal behavior with a period longer than the geodesic acoustic oscillation period is observed even in a collisionless system. Our simulation results suggest that the zonal flows can drive turbulence. However, this process is too weak to be an effective zonal flow saturation mechanism.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
941506
Report Number(s):
PPPL-4142
Journal ID: ISSN 1070-664X; PHPAEN; TRN: US0807439
DOE Contract Number:
DE-AC02-76CH03073
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 13; Journal Issue: 9
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACOUSTICS; COLLISIONLESS PLASMA; CROSS SECTIONS; ELECTRIC FIELDS; GEODESICS; GEOMETRY; OSCILLATIONS; PLASMA; ROTATION; SATURATION; SIMULATION; TRANSPORT; TURBULENCE; plasma turbulence, plasma transport processes, Tokamak devices, plasma toroidal confinement, plasma simulation, plasma flow, plasma collision processes, plasma nonlinear processes, plasma oscillations

Citation Formats

Wang, W.X., Lin, Z., Tang, W.M., Lee, W.W., Ethier, S., Lewandowski, J.L.V., Rewoldt, G., Hahm, T.S., and Manickam, J.. Gyrokinetic Simulation of Global Turbulent Transport Properties in Tokamak Experiments. United States: N. p., 2006. Web. doi:10.1063/1.2338775.
Wang, W.X., Lin, Z., Tang, W.M., Lee, W.W., Ethier, S., Lewandowski, J.L.V., Rewoldt, G., Hahm, T.S., & Manickam, J.. Gyrokinetic Simulation of Global Turbulent Transport Properties in Tokamak Experiments. United States. doi:10.1063/1.2338775.
Wang, W.X., Lin, Z., Tang, W.M., Lee, W.W., Ethier, S., Lewandowski, J.L.V., Rewoldt, G., Hahm, T.S., and Manickam, J.. Sun . "Gyrokinetic Simulation of Global Turbulent Transport Properties in Tokamak Experiments". United States. doi:10.1063/1.2338775. https://www.osti.gov/servlets/purl/941506.
@article{osti_941506,
title = {Gyrokinetic Simulation of Global Turbulent Transport Properties in Tokamak Experiments},
author = {Wang, W.X. and Lin, Z. and Tang, W.M. and Lee, W.W. and Ethier, S. and Lewandowski, J.L.V. and Rewoldt, G. and Hahm, T.S. and Manickam, J.},
abstractNote = {A general geometry gyro-kinetic model for particle simulation of plasma turbulence in tokamak experiments is described. It incorporates the comprehensive influence of noncircular cross section, realistic plasma profiles, plasma rotation, neoclassical (equilibrium) electric fields, and Coulomb collisions. An interesting result of global turbulence development in a shaped tokamak plasma is presented with regard to nonlinear turbulence spreading into the linearly stable region. The mutual interaction between turbulence and zonal flows in collisionless plasmas is studied with a focus on identifying possible nonlinear saturation mechanisms for zonal flows. A bursting temporal behavior with a period longer than the geodesic acoustic oscillation period is observed even in a collisionless system. Our simulation results suggest that the zonal flows can drive turbulence. However, this process is too weak to be an effective zonal flow saturation mechanism.},
doi = {10.1063/1.2338775},
journal = {Physics of Plasmas},
number = 9,
volume = 13,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}