Greifswald 2024 – scientific programme

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P: Fachverband Plasmaphysik

P 12: Poster II

P 12.6: Poster

Tuesday, February 27, 2024, 16:30–18:30, ELP 6: Foyer

Towards a 3D Full MHD plasma model comprehensive of electromagnetic and halo current coupling with 3D conductive structures — •Raffaele Sparago¹, Javier Artola², and Matthias Hoelzl¹ — ¹Max Planck Institute for Plasma Physics, Garching, Germany — ²ITER Organization, St. Paul Lez Durance Cedes, France

An adequate modelling of the electromagnetic interaction of the plasma with the surrounding conductors is paramount for the correct reproduction of 3D plasma dynamics. Simulations of the latter provide in turn useful predictions regarding the plasma evolution, the related MHD modes leading to disruptions and the electromagnetic forces acting on the vacuum vessel's components when said disruptions occur. The latest modelling efforts with the 3D FEM non-linear JOREK code have been directed towards the eddy current coupling of a reduced MHD plasma model with thin and volumetric wall codes. In the context of this work, an eddy current coupling between the full MHD model of JOREK and the STARWALL code has been performed; this new coupling scheme relaxes all the degrees of freedom in JOREK's magnetic boundary conditions, allowing for three-dimensional interactions between the magnetic vector potential A and the magnetic field B. Preliminary benchmarks prove the consistency of the Full MHD coupling. Furthermore, this contribution features the recent theoretical development in view of the coupling of halo currents, which flow from the plasma to the wall and viceversa, thus originating additional electromagnetic loads on the vessel that require proper modelling.

Keywords: free boundary; 3D fields; resistive wall modes; eddy currents; halo currents