Modeling of the pedestal performance in the DTT tokamak

Detta är en Uppsats för yrkesexamina på avancerad nivå från Uppsala universitet/Tillämpad kärnfysik

Författare: Hampus Nyström; [2020]

Nyckelord: Fusion; pedestal; DTT;

Sammanfattning: This master thesis concerns the modeling of the pedestal in the fusion plasma device DTT and its dependence on several plasma parameters. The modeling was performed using the Europed code which is based on the EPED model. Several parameters were found to have a significant impact on the pedestal predictions. This included the plasma current, toroidal magnetic field and the density at the pedestal top. It was also found that the relative position between the temperature pedestal and density pedestal as well as one of the coefficients in the EPED model had a large impact on the pedestal predictions. Of these, the coefficient in the EPED model and the relative position shift are expected to impart the greatest uncertainty in the pedestal predictions performed. The reason for this is that there is currently no reliable method for estimating these parameters beforehand of an experiment. In the span of this work it was also found that restrictions on the safety factor in the core could have large impacts on the pedestal predictions.

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