Tuning and Testing a One-dimensional Transport Model
L. Jones, A. Ware, D. Brugger, M. Gilmore, E. Schuster
Division of Plasma Physics (DPP) Annual Meeting of the American Physical Society (APS)
Salt Lake City, Utah, USA, November 14-18, 2011
Abstract
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Modeling of transport and flow generation in a linear plasma device
using a 1-D transport code is presented. Drift wave turbulence models
have been analyzed to derive models for the growth rate and nonlinear
saturation mechanism used in the transport model. The model has also
been modified to include a cold-ion option and to explore different
Reynolds stress parameterizations. We present comparisons with density
and density fluctuation profiles from HELCAT experiments. The use of
biased concentric rings as control elements for the radial electric
field profile in HELCAT is also modeled in the transport code. By
varying the bias voltages, the local E×B flow can be modified. By
varying the momentum sources a sheared radial electric field can be
generated that suppress turbulent particle and heat transport. The
impact of biasing, axial flow and plasma boundary conditions are
investigated.