Turbulent Transport of Trapped-Electron Modes in Collisionless Plasmas
Journal Article
·
· Physical Review Letters
- Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
Global gyrokinetic particle simulations of collisionless trapped-electron mode turbulence in toroidal plasmas find that electron heat transport exhibits a device size scaling with a gradual transition from Bohm to gyro-Bohm scaling. A comprehensive analysis of spatial and temporal scales shows that the turbulence eddies are predominantly microscopic because of zonal flow shearing, but the presence of mesoscale structures drives a nondiffusive component in the electron heat flux due to the weak nonlinear detuning of the precessional resonance that excites the linear instability.
- OSTI ID:
- 21364628
- Journal Information:
- Physical Review Letters, Vol. 103, Issue 8; Other Information: DOI: 10.1103/PhysRevLett.103.085004; (c) 2009 The American Physical Society; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED-PARTICLE TRANSPORT
COLLISIONLESS PLASMA
HEAT FLUX
HEAT TRANSFER
NONLINEAR PROBLEMS
RESONANCE
SIMULATION
TRAPPED ELECTRONS
TURBULENCE
ELECTRONS
ELEMENTARY PARTICLES
ENERGY TRANSFER
FERMIONS
LEPTONS
PLASMA
RADIATION TRANSPORT
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED-PARTICLE TRANSPORT
COLLISIONLESS PLASMA
HEAT FLUX
HEAT TRANSFER
NONLINEAR PROBLEMS
RESONANCE
SIMULATION
TRAPPED ELECTRONS
TURBULENCE
ELECTRONS
ELEMENTARY PARTICLES
ENERGY TRANSFER
FERMIONS
LEPTONS
PLASMA
RADIATION TRANSPORT