Greifswald 2024 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 7: Magnetic Confinement III
P 7.2: Vortrag
Dienstag, 27. Februar 2024, 11:30–11:45, ELP 6: HS 3
Edge current density distributions in the island divertor configurations on the J-TEXT tokamak — •Jiankun Hua1,2, Yunfeng Liang1,2,3, Qinghu Yang2, Jie Yang2, Song Zhou2, and Yutong Yang2 — 1Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung Plasmaphysik, 52425 Jülich, Germany — 2International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, Huazhong University of Science and Technology, Wuhan, 430074, China — 3Institute of Plasma Physics, Chinese Academy of Sciences, 23003 Hefei, China
The island divertor configuration was recently operated on the J-TEXT tokamak, and the magnetic field structure can vary with the edge safe factor (qa), amplitude and phase of the island divertor coil current. A set of probes called the Directional Electron Probe (DEP) was developed to measure edge plasma current density distributions in different configurations. The qa scan was performed by increasing the total plasma current from 80kA to 110kA with a fixed toroidal magnetic field (1.6T) and island divertor coil current (+5kA or -5kA). At the same time, the m/n=3/1 magnetic island will move from the inside of the last closed flux surface (LCFS) to the outside. In this experiment, the DEP remains at the same position in the plasma, and the dynamic of plasma current density distribution can be measured as the m/n=3/1 magnetic island moves. Preliminary experimental results show that the edge current density distribution has a strong correlation with the length of the magnetic field lines and the edge magnetic configuration (such as magnetic island).
Keywords: plasma edge; magnetic island; configuration; current density