Erlangen 2026 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

P: Fachverband Plasmaphysik

P 16: Poster Session Plasma Physics

P 16.105: Poster

Thursday, March 19, 2026, 13:45–15:45, Redoutensaal

Development of a Synthetic Helium Beam Diagnostic at ASDEX Upgrade — •Pietro Pecchini, Michael Griener, Sebastian Hoermann, Wladimir Zholobenko, Kaiyu Zhang, and Ondrej Grover — Max Planck Institute for Plasma Physics, Garching

Turbulent plasma behavior in the edge and scrape-off layer is a key factor for magnetic confinement fusion. Physics-based plasma boundary codes like GRILLIX, based on a two-fluid description of the plasma, can model these dynamics by simulating fundamental plasma parameters, such as electron density and temperature. However, experimental diagnostics - such as the helium beam diagnostic - measure derived quantities like spectral line emission intensities, making a direct comparison of measurement and simulation outputs challenging. To quantitatively validate the code output with experimental data, a synthetic helium beam diagnostic that translates simulation outputs into experimentally accessible signals is developed. A first implementation of this synthetic diagnostic for ASDEX Upgrade GRILLIX simulations is presented, and its performance is evaluated by comparing it with simplified models to quantify the impact of key effects. The importance of computing the ionization of the helium, considering simultaneously the time evolution of both helium particles and plasma, is investigated. The synthetic emission profile is decomposed to illustrate its dependence on electron density, helium density, and photon emissivity coefficients, for both an individual spectral line and the ratio between two spectral lines.

Keywords: Helium Beam diagnostic; Plasma Turbulence; Synthetic Diagnostic; ASDEX Upgrade; Numerical simulation