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  • Intra-ELM phase modelling o...
    Harting, D.M.; Wiesen, S.; Groth, M.; Brezinsek, S.; Corrigan, G.; Arnoux, G.; Boerner, P.; Devaux, S.; Flanagan, J.; Järvinen, A.; Marsen, S.; Reiter, D.

    Journal of nuclear materials, 08/2015, Letnik: 463
    Journal Article

    We present the application of an improved EDGE2D-EIRENE SOL transport model for the ELM phase utilizing kinetic correction of the sheath-heat-transmission coefficients and heat-flux-limiting factors used in fluid SOL modelling. With a statistical analysis over a range of similar type-I ELMy H-mode discharges performed at the end of the first JET ITER-like wall campaign, we achieved a fast (Δt=200μs) temporal evolution of the outer midplane ne and Te profiles and the target-heat and particle-flux profiles, which provides a good experimental data set to understand the characteristics of an ELM cycle. We will demonstrate that these kinetic corrections increase the simulated heat-flux-rise time at the target to experimentally observed times but the power-decay time at the target is still underestimated by the simulations. This longer decay times are potentially related to a change of the local recycling coefficient at the tungsten target plate directly after the heat pulse.