Greifswald 2024 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 12: Poster II
P 12.11: Poster
Dienstag, 27. Februar 2024, 16:30–18:30, ELP 6: Foyer
Parametrisation of target heat flux in W7-X — •Johannes Droste2, Felix Reimold1, David Bold1, and Ralf Schneider2 — 1Max-Planck Institute for Plasma Physics, Greifswald, Germany — 2Universität Greifswald
This poster presents an approach to address the complex behaviour of the W7-X strike line. It introduces a tool for parameterising the heat flux on to the W7-X island divertor. Particularly distinctive at high densities, the strike line profile exhibits multiple, sometimes overlapping features. The developed tool allows for the separation and characterisation of these features. Through a comparative analysis of feature positions and corresponding connection lengths, a link is established to different transport channels within the island. In addition, the methodology allows the localisation of errors in heat flux calculations due to material deposition and damage to the target surface of the divertor. The width and amplitude of the strike line are key parameters, providing valuable insight into transport and diffusion within the scrape-off layer. Accurate measurement of these parameters is essential for improving and validating scrape-off layer modeling. The influence of time dependent parameters like toroidal plasma current and its influence on strike line position is also investigated.
Keywords: W7-X; Stellarator; Divertor; scrape-off layer