Kinetic neoclassical calculations of impurity radiation profiles. (August 2017)

• Record Type: Journal Article
• Authors: Stotler, D.P.; Battaglia, D.J.; Hager, R.; Kim, K.; Koskela, T.; Park, G.; Reinke, M.L.
• Is Part Of: Nuclear materials and energy. Volume 12(2017)
• Page Start: 1130
• Page End: 1135
• Publication Date: 2017-08
• Subjects: Neoclassical transport -- Impurity radiation -- Coronal equilibrium -- Kinetic simulation -- Particle-in-cell -- Spherical torus; Nuclear energy -- Periodicals; Nuclear fuels -- Periodicals; Nuclear reactors -- Materials -- Periodicals; Radioactive substances -- Periodicals; 621.4833
• DOI: 10.1016/j.nme.2016.12.021
• Languages: English
• ISSNs: 2352-1791

Abstract

Abstract: Modifications 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 first applied to a simulation of an NSTX H-mode discharge with carbon impurity to demonstrate the approach to coronal equilibrium. The effects of neoclassical phenomena on the radiated power profile 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.