Integrated Modelling of a JET Type-I ELMy H-mode Pulse and Predictions for ITER-Like Wall Scenarios

A baseline type-I ELMy H-mode discharge in JET (Pulse No: 73569) in low triangularity has been analysed numerically using the JINTRAC integrated code suite in order to obtain a self-consistent description of the edge and core plasma. The time-dependent model consists of a self-consistent coupling of the core plasma dynamics utilising the 1D core code JETTO/SANCO and the 2D multi-fluid Scrape-Off-Layer (SOL) code EDGE2D-EIRENE. The inter- and intra-ELM transport model of JINTRAC has been adapted to match the experimental pre- and post ELM plasma profiles measured by high-resolution Thomson scattering in JET and at the same time the observed ELM dynamics in terms of ELM frequency, ELM energy loss, ELM wetted area and heat flows towards the target plates. It is found that the scaling for the free streaming approximations of ELM filamentary parallel SOL transport for the maximum heat flux, energy density and heat flux factor can be reproduced with the JINTRAC model. The results for the JET all-carbon device reference case are then utilised to predict a type-I ELMy H-mode for the JET ITER-Like Wall (ILW) assuming a full-tungsten divertor and beryllium main-chamber wall in the model. By keeping all transport relevant parameters fixed for the inter- and intra-ELM phase it is found that a moderate amount of seeded neon impurity (or other impurity species) is necessary to match a similar level of radiation when carbon is absent in the system. Finally, the results of the ILW setup are used to estimate the total amount of tungsten particles eroded per ELM from the target plates and a rough estimate of the core radiative fraction due to W accumulation is given.
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EFDC110434 1.11 Mb