Self-consistent modeling of impurity seeded JET advanced tokamak scenarios

Abstract

The influence of neon and nitrogen seeding on the divertor heat load in JET tokamak is studied in terms of the numerical simulations of the whole device by the self-consistent core-edge code COREDIV and results are presented for advanced tokamak scenarios. First, the code has been applied to Simulate two JET shots (#69980, #69987) characterized by different radiation levels. With this basis the code is used next to provide guidance for the JET experiments in terms of: effects on the heat load at the target plates for various x-point positions with respect to the target plates, and the effect of higher plasma and separatrix density, as well as effects of pure or mixed Ne/N-2-seeding. (C) 2009 Elsevier B.V. All rights reserved