Effects of plasma parameters on temperature and density pedestals in ITER scenarios
T. Rafiq, J. Weiland, E. Schuster
Division of Plasma Physics (DPP) Annual Meeting of the American Physical Society (APS)
Remote, November 9-13, 2020
Abstract
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ITER temperature and density pedestals are computed using Weiland
anomalous transport model. The neoclassical transport is calculated
using NCLASS or Chang- Hinton model. The effects of plasma parameters
on electron temperature, electron density and ion temperature pedestal
height and width are computed. The current density, magnetic field
strength, edge density fueling, neoclassical ion diffusivity, alpha
heating, and flow shear are varied. The simulations are started with
prescribed sources and a guessed L-mode profile and evolve to L-H
transition and temperature and density pedestal self-consistently.
There are no assumptions in the simulations that suggest that there
will be an L-H transition or where the temperature and density barrier
should be. An L to H mode transition can be obtained by either
stabilization due to pressure gradient driven shear flow or diamagnetic
effects. The goal of these integrated ITER simulations is to investigate
the sensitivity of fusion power production in ITER to the height of the
density and temperature pedestal.