Gyrokinetic study of electromagnetic effects on toroidal momentum transport in tokamak plasmas

Journal Article · Fri Jul 15 04:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3609841· OSTI ID:22046882

Hein, T; Angioni, C; Fable, E ^[1]; Candy, J ^[2]; Peeters, A G ^[3]

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1. Max-Planck-Institut fuer Plasmaphysik, IPP-EURATOM Association, D-85748 Garching (Germany)
2. General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)
3. Department of Physics, University of Bayreuth, D-95440 Bayreuth (Germany)

The effect of a finite {beta}{sub e} = 8{pi}n{sub e}T{sub e}/B{sup 2} on the turbulent transport of toroidal momentum in tokamak plasmas is discussed. From an analytical gyrokinetic model as well as local linear gyrokinetic simulations, it is shown that the modification of the parallel mode structure due to the nonadiabatic response of passing electrons, which changes the parallel wave vector k{sub ||} with increasing {beta}{sub e}, leads to a decrease in size of both the diagonal momentum transport as well as the Coriolis pinch under ion temperature gradient turbulence conditions, while for trapped electron modes, practically no modification is found. The decrease is particularly strong close to the onset of the kinetic ballooning modes. There, the Coriolis pinch even reverses its direction.

• OSTI ID: 22046882
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 18; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BALLOONING INSTABILITY
COMPUTERIZED SIMULATION
ION TEMPERATURE
MAGNETIC CONFINEMENT
MAGNETOHYDRODYNAMICS
PINCH EFFECT
PLASMA
PLASMA SIMULATION
TEMPERATURE GRADIENTS
TOKAMAK DEVICES
TRAPPED ELECTRONS
TURBULENCE