Dynamical alignment in three species tokamak edge turbulence

Three-dimensional computations of self-consistent three species gyrofluid turbulence are carried out for tokamak edge conditions. Profiles as well as disturbances in dependent variables are followed, running the dynamical system to transport equilibrium. The third species density shows a significant...

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Bibliographic Details
Published in:Physics of plasmas 2005-08, Vol.12 (8), p.082305-082305-11
Main Author: Scott, Bruce D.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY LAYERS
CHARGED-PARTICLE TRANSPORT
CORRELATIONS
DISTURBANCES
ELECTRONS
EQUILIBRIUM
PLASMA
PLASMA CONFINEMENT
PLASMA DENSITY
PLASMA DRIFT
TEST PARTICLES
TOKAMAK DEVICES
TURBULENCE
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Summary:Three-dimensional computations of self-consistent three species gyrofluid turbulence are carried out for tokamak edge conditions. Profiles as well as disturbances in dependent variables are followed, running the dynamical system to transport equilibrium. The third species density shows a significant correlation with that of the electrons, regardless of initial conditions and drive mechanisms. For decaying systems the densities evolve toward each other. Companion investigations with a simple two-dimensional drift wave model show this persists even if the third species is a passively advected test species field. Similarity in the transport character of electrons and the trace species does not imply that the electrons themselves have a test particle transport character.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.1993507