SMuK 2021 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
P: Fachverband Plasmaphysik
P 9: Codes and Modelling (Methods)
P 9.2: Talk
Wednesday, September 1, 2021, 16:45–17:00, H5
Full-wave simulations of measurements of the perpendicular velocity of density fluctuations with Doppler reflectometry at ASDEX Upgrade — •Antonia Frank1,2, Klara Höfler1,2, Tim Happel2, Carsten Lechte3, Tobias Görler2, Ulrich Stroth2,1, and the ASDEX Upgrade Team2 — 1Technische Universität München, Munich, Germany — 2Max-Planck-Institut für Plasma Physik, Garching, Germany — 3Institut für Grenzflächenverfahrenstechnik und Plasmatechnologie IGVP, Stuttgart, Germany
The perpendicular propagation velocity of turbulent density fluctuations v⊥ is an important quantity in fusion plasmas since sheared plasma flows are crucial for the reduction of turbulence and thus a relevant input parameter for simulations of turbulent transport. In the recent past, poloidal asymmetries have been observed in various fusion devices using Doppler reflectometry and correlation reflectometry. An explanation of these asymmetries may lie in the diagnostic response. Hence, numerical investigation using synthetic diagnostics is of great interest. The IPF-FD3D full-wave code is used as a synthetic Doppler reflectometry diagnostic, simulating microwave propagation and scattering. Turbulence flows are studied in several geometries with different synthetic turbulence spectra. The influence of the measurement’s poloidal location on the diagnostic response is investigated. Full-wave simulations are also applied to turbulence from the gyro-kinetic code GENE in ASDEX Upgrade geometry on basis of selected experimental data for direct comparison with measurements.