Erlangen 2018 – scientific programme
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P: Fachverband Plasmaphysik
P 11: Helmholtz Graduate School - Poster
P 11.27: Poster
Tuesday, March 6, 2018, 16:15–18:15, Redoutensaal
Analysis and Modelling of Neon Seeded JET Discharges with High Radiative Power Fraction — •Stephan Glöggler1,2, Marco Wischmeier1, and JET Contributors3 — 1IPP, Garching, Germany — 2Physik-Department E28, TUM, Garching, Germany — 3See the author list of ”X. Litaudon et al 2017 Nucl. Fusion 57 102001”
In future fusion devices as ITER and DEMO the power flux onto the divertor target plates will have to be reduced by impurity radiation. In DEMO a major fraction of the induced radiative power losses must originate inside the last closed flux surface. As radiative power losses within the confined plasma might impact the plasma confinement and the discharge stability it is crucial to determine and understand the underlying physical processes in high radiative discharges.
At JET it could be measured that with the seeding of neon the radial pedestal temperature and densisty profiles degrade at the edge but recover towards the core. An increase of the energy confinement time is observed. An inter-relation of these pedestal profiles with the radial radiation distribution is analyzed.
Numerical simulations with the code package SOLPS-ITER (plasma fluid code B2.5 coupled with the Monte Carlo neutral code EIRENE) of unseeded and neon seeded discharges complement the experimental findings. The impact of neon seeding on the pedestal profiles and on the divertor conditions will be investigated within these simulations.