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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.115: Poster
Donnerstag, 19. März 2026, 13:45–15:45, Redoutensaal
Dynamic evolutions of radiation and divertor target behavior during detachment with an island divertor configuration on J-TEXT — •Yutong Yang1, Yunfeng Liang1, 2, Wei Yan2, Jiankun Hua2, and Song Zhou2 — 1Forschungszentrum Jülich GmbH, Institute of Fusion Energy and Nuclear Waste Management Plasma Physics, Jülich, Germany — 2International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, Huazhong University of Science and Technology, Wuhan, China
On J-TEXT, the temporal evolution of the heat flux distribution on the divertor plate has been measured using an infrared camera with an island divertor configuration. In previous experiments employing this configuration, partial detachment was achieved by SMBI gas fuelling when the radiation front approached the last closed flux surface (LCFS). This observation is consistent with the results obtained on the W7-X stellarator. We conducted a series of experiments under different island divertor configurations to further validate this conclusion. By reconstructing the 2D radiation profile using AXUV arrays, we investigated the dynamic characteristics of edge radiation, heat and particle fluxes on divertor target during the detachment. The results highlight the critical role of magnetic topology in the onset and development of detachment, providing important insights into realizing stable detachment under 3D boundary conditions.
Keywords: island divertor; tokamak; heat flux; detachment