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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.82: Poster
Thursday, March 19, 2026, 13:45–15:45, Redoutensaal
Comparison of experimental radiation dynamics in the scrape-off layer of Wendelstein 7-X with transport simulations — •Kevin Andrea Siever1, Felix Reimold1, Satoshi Togo2, Gabriele Partesotti1, Takashi Nishizawa3, Daihong Zhang1, Nassim Maaziz1, Anastasios Tsikouras1, Valeria Perseo1, Victoria Winters1, Masahiro Kobayashi4, Byron Peterson4, and Kiyofumi Mukai4 — 1Max Planck Institute, Greifswald, Germany — 2Plasma Research Center, University of Tsukuba, Tsukuba, Japan — 3Kyushu University, Kasuya, Japan — 4National Institute for Fusion Science, Toki, Japan
At Wendelstein 7-X (W7-X) the strongly 3D topology of the scrape-off layer (SOL) leads to a complex behavior of the impurity radiation structure. In this context, the 3D transport code EMC3-Eirene is often used to assess its SOL. This contribution aims at the validation of such simulations with experimental data, focusing on the radiation distribution. In the work [S. Togo et al (submitted) Plasma Phys. Control. Fusion], density scans have been simulated with EMC3-Eirene for 5 configurations corresponding to different radial positions of the islands. Matching W7-X density scan-experiments are chosen and data from the 3 available bolometry systems analyzed. In order to compare the simulated radiation structure to the experimental data, synthetic diagnostic data generation and 2D tomographic inversions are employed. This allows to compare with the simulations the experimental poloidal evolution of the emissivity localization as density is increased, for the different geometries.
Keywords: Stellarator; Magnetic Confinement Fusion; Total Radiated Power; EMC3-Eirene