Sensitivity of predictive tokamak plasma transport simulations

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872384· OSTI ID:565325

Redd, A J; Kritz, A H; Bateman, G; Kinsey, J E ^[1]

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1. Physics Department, 16 Memorial Drive East, Lehigh University, Bethlehem, Pennsylvania 18015 (United States)

The sensitivity of our time-dependent simulations of low confinement (L-mode) discharges to variations in initial profiles and time-dependent boundary conditions has been explored. These time-dependent tokamak plasma simulations were performed using a theory-based Multi-mode transport model that includes ion temperature gradient (ITG) and trapped electron modes (TEM), kinetic and resistive ballooning modes and neoclassical modes. The density and temperature profiles predicted in our simulations of L-mode discharges are found to be robust, even with significant variations in the initial or boundary conditions. Although transport associated with a single mode can be strongly affected by local changes in plasma parameters resulting from changes in the boundary conditions, the total transport remains largely unchanged because of compensation by other transport modes. The sensitivity of the predicted temperature and density profiles to a variation in the Multi-mode model is also examined. When the Dominguez-Waltz theory of transport driven by ITG and TEM modes is replaced in the Multi-mode model by the Weiland description, we find that the predictions of the Weiland model more closely match the experimental data. {copyright} {ital 1997 American Institute of Physics.}

• DOE Contract Number: FG02-92ER54141
• OSTI ID: 565325
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 4; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BALLOONING INSTABILITY
PLASMA DENSITY
PLASMA SIMULATION
PLASMA WAVES
SENSITIVITY
TOKAMAK DEVICES
TRANSPORT THEORY