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Jena 2013 – scientific programme

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P: Fachverband Plasmaphysik

P 17: Poster: Magnetischer Einschluss

P 17.1: Poster

Thursday, February 28, 2013, 14:00–16:00, Poster EG

Modelling of helical current filaments induced by LHW on EAST — •Michael Rack1, Long Zeng1,2, Peter Denner1, Yunfeng Liang1, Xianzu Gong2, Kaifu Gan2, Eric Gauthier3, Liang Wang2, Fukun Liu2, Jinping Qian2, Biao Shen2, Jiangang Li2, and the EAST Team21Institute of Energy and Climate Research - Plasma Physics, Forschungszentrum Jülich GmbH, Association EURATOM-FZJ, Partner in the Trilateral Euregio Cluster, D-52425 Jülich, Germany — 2Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China — 3Association EURATOM-CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France

Helical radiation belts have been observed in the scrape-off layer (SOL) of the plasma during the application of lower hybrid wave (LHW) heating at the superconducting tokamak EAST. Modelled SOL field lines, starting in-front of the LHW antennas, show agreement in position and pitch angle to the experimental observed radiation belts. A splitting of the strike-line can be observed on the outer divertor plates during the application of LHW heating. Agreement in the comparison of the Mirnov coil signals and a modelled electric current flow along these SOL field lines was found. A lower hybrid current drive can induce such an electric current flow near the plasma edge. This electric current flow causes a change of the plasma topology which could result in the splitting of the strike-line as known from the application of resonant magnetic perturbation fields. Comparisons of modelled footprint structures and experimental observed heat load patterns in the divertor region are discussed.

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