Stabilization of Ion-Temperature-Gradient{endash}Driven Tokamak Modes by Magnetic-Field Gradient Reversal

Journal Article · Thu May 01 04:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.78.3471· OSTI ID:496808

Fivaz, M; Tran, T; Appert, K; Vaclavik, J ^[1]; Parker, S ^[2]

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1. Centre de Recherches en Physique des Plasmas, Association Euratom-Confederation Suisse, Ecole Polytechnique Federale de Lausanne, PPB, 1015 Lausanne (Switzerland)
2. Department of Physics, University of Colorado, Boulder, Colorado 80309 (United States)

Global gyrokinetic particle simulations have been used to search tokamak configurations which are stable against the ion-temperature-gradient{endash}driven (ITG) modes commonly held responsible for the core anomalous ion heat transport. The stable configurations are characterized by strongly reduced or reversed {triangledown}B drifts on the low-field side. Since excellent transport properties have been observed in high {beta}{sub p} (poloidal beta) tokamak experiments, we conjecture, as a result of our simulations, that this may be due to the stabilization of ITG modes by the reduction of the {triangledown}B drifts. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 496808
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ION TEMPERATURE
MAGNETIC FIELD REVERSAL
PLASMA INSTABILITY
PLASMA SIMULATION
STABILIZATION
TEMPERATURE GRADIENTS
TOKAMAK DEVICES
TRANSPORT