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Smith (3), Institute of Engineering Thermodynamics, Matt Landreman (2), Per Helander (3) ((1) Department of Applied Physics, Stefanie Braun (3, Stuttgart, Sweden, University of Maryland, USA","submitted_at":"2015-04-19T08:26:55Z","abstract_excerpt":"Impurities cause radiation losses and plasma dilution, and in stellarator plasmas the neoclassical ambipolar radial electric field is often unfavorable for avoiding strong impurity peaking. In this work we use a new continuum drift-kinetic solver, the SFINCS code (the Stellarator Fokker-Planck Iterative Neoclassical Conservative Solver) [M. Landreman et al., Phys. Plasmas 21 (2014) 042503] which employs the full linearized Fokker-Planck-Landau operator, to calculate neoclassical impurity transport coefficients for a Wendelstein 7-X (W7-X) magnetic configuration. 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