Kinetic neoclassical calculations of impurity radiation profiles
Authors: D.P. Stotler, D.J. Battagliaa, R. Hager,
K. Kim, T. Koskela, G. Park, M.L. Reinke
Abstract: Modi cations of the drift-kinetic
transport code XGC0 to include the transport, ionization, and
recombination of individual charge states, as well as the
associated radiation, are described. The code is rst applied to a
simulation of an NSTX H-mode discharge with carbon impurity to
demonstrate the approach to coronal equilibrium. The e ects of
neoclassical phenomena on the radiated power profi le are examined
sequentially through the activation of individual physics modules
in the code. Orbit squeezing and the neoclassical inward pinch
result in increased radiation for temperatures above a few hundred
eV and changes to the ratios of charge state emissions at a given
electron temperature. Analogous simulations with a neon impurity
yield qualitatively similar results.
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