Turbulent Transport of Trapped-Electron Modes in Collisionless Plasmas

Journal Article · Fri Aug 21 04:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.085004· OSTI ID:21364628

Yong, Xiao; Zhihong, Lin ^[1]

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1. 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, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED-PARTICLE TRANSPORT
COLLISIONLESS PLASMA
ELECTRONS
ELEMENTARY PARTICLES
ENERGY TRANSFER
FERMIONS
HEAT FLUX
HEAT TRANSFER
LEPTONS
NONLINEAR PROBLEMS
PLASMA
RADIATION TRANSPORT
RESONANCE
SIMULATION
TRAPPED ELECTRONS
TURBULENCE