An edge-plasma simulation for tokamak fusion devices is developed that couples 3D turbulence and 2D transport, including detailed sources and sinks, to determine self-consistent steady-state plasma profiles. Relaxed iterative coupling is shown to be effective when edge turbulence is partially suppressed, for example, by shear E x B shear flow as occurs during the favorable H-mode region. Unsuppressed turbulence is found to lead to large, intermittent edge transport events where the coupling procedure can lead to substantial inaccuracies in describing the true time-averaged plasma behavior.
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Lawrence Livermore National Laboratory (LLNL), Livermore, CA
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An edge-plasma simulation for tokamak fusion devices is developed that couples 3D turbulence and 2D transport, including detailed sources and sinks, to determine self-consistent steady-state plasma profiles. Relaxed iterative coupling is shown to be effective when edge turbulence is partially suppressed, for example, by shear E x B shear flow as occurs during the favorable H-mode region. Unsuppressed turbulence is found to lead to large, intermittent edge transport events where the coupling procedure can lead to substantial inaccuracies in describing the true time-averaged plasma behavior.
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Rognlien, T.; Cohen, R.; LoDestro, L.; Palasek, R.; Umansky, M. & Xu, X.FY05 LDRD Final Report Coupled Turbulenc/Transport Model for Edge-Plasmas,
report,
February 9, 2006;
Livermore, California.
(https://digital.library.unt.edu/ark:/67531/metadc886513/:
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