Missions

Handling the deposition of plasma power in the scrape-off layer (SOL) of a tokamak device is one of the most critical challenges in fusion research. In ITER, the amount of power heat flux to be deposited on the target plates in the SOL could be more than five times greater than the technical limit imposed by materials. This excessive heat flux could lead to material damage, erosion, and even failure of divertor components. Plasma detachment, a regime in which thermal loads on divertor plates are reduced, is a key strategy to mitigate these effects. This regime is essential for protecting components exposed to plasma, extending their operational life, and minimizing maintenance requirements.

Activities

This postdoctoral project will make extensive use of the SOLEDGE-HDG code, a state-of-the-art tool developed by the team that applies high-order finite elements for highly efficient and accurate simulations of plasma equilibrium under realistic geometries and operational conditions. This code is ideally suited for exploring the complex physics behind plasma detachment and bifurcation transitions. Through its capabilities, the project aims to advance the theoretical understanding of the mechanisms driving detachment while characterizing the effects of different operational conditions throughout the discharge phases. Numerical simulations using SOLEDGE-HDG will be compared with experimental measurements and simplified theoretical models to deepen insight into the detachment process.

Skills

The candidate will have a solid background in plasma physics and numerical modelling. The numerical developments required involve advanced skills in finite-element method as well as team-working skills to interact frequently with other students working on the same numerical code, software engineers, and physicists.

Work Context

The position is located in Chateau-Gombert.
Travel to CEA Cadarache is to be expected.

Constraints and risks

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