Erlangen 2026 – scientific programme
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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.21: Poster
Thursday, March 19, 2026, 13:45–15:45, Redoutensaal
Characterisation of phase velocities and dispersion relations in Wendelstein 7-X turbulence, assisted by sensitivity analysis of poloidal correlation reflectometry — Sander De Koker1,2, Gavin Weir2, Carsten Lechte3, Andreas Krämer-Flecken4, •Thomas Windisch2, Olaf Grulke2, and Peter Manz1,2 — 1University of Greifswald, Institute of Physics, Greifswald, Germany — 2Max Planck Institute for Plasma Physics, Greifswald, Germany — 3Institut für Grenzflächenverfahrenstechnik und Plasmatechnologie, University of Stuttgart, Stuttgart, Germany — 4Institute of Fusion Energy and Nuclear Waste Management - Plasma Physics, Forschungszentrum Jülich GmbH, Jülich, Germany
Different instabilities in plasmas differ in terms of their phase velocity, which is therefore used to identify them. One diagnostic well suited for this is poloidal correlation reflectometry. The sensitivity of its measurement capabalities and its dependence on various parameters is however not fully understood. In order to improve the understanding of turbulence dispersion relations and phase velocities, an initial goal is to investigate and characterise this sensitivity. As a first step, full wave simulations have been performed, showing a dependence of the sensitivity on both turbulence poloidal wavenumber as well as antenna separation.
Keywords: Turbulence; Poloidal correlation reflectometry; Wendelstein 7-X