Experimental characterization of the quasi-coherent mode in EDA H-Mode and QCE scenarios at ASDEX Upgrade

J. Kalis, G. Birkenmeier, P. Manz, T. Eich, M. Griener, R. Goti, M. Cavedon,L. Gil, M. Faitsch, L. Radovanovic, D. Wendler, E. Wolfrum, U. Stroth

Nuclear Fusion（2024）

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摘要

The quasi-coherent mode (QCM), appearing in enhanced D alpha high confinement mode (EDA H-mode) and quasi-continuous exhaust (QCE) plasmas has been analysed in detail at ASDEX Upgrade via thermal helium beam spectroscopy under various discharge parameters. In both scenarios the QCM appears to be localized close to the separatrix and to propagate in ion diamagnetic direction in the plasma frame. The poloidal wavenumber of the QCM is about 0.025更多

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关键词

fusion,plasma edge,plasma modes,EDA H-mode,quasi-continuous exhaust,quasi-coherent mode,helium beam diagnostic

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