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- W1990561437 endingPage "024008" @default.
- W1990561437 startingPage "024008" @default.
- W1990561437 abstract "Comprehensive understanding of energetic-ion-driven global instabilities such as Alfven eigenmodes (AEs) and their impact on energetic ions and bulk plasma is crucially important for tokamak and stellarator/helical plasmas and in the future for deuterium–tritium (DT) burning plasma experiments. Various types of global modes and their associated enhanced energetic ion transport are commonly observed in toroidal plasmas. Toroidicity-induced AEs and ellipticity-induced AEs, whose gaps are generated through poloidal mode coupling, are observed in both tokamak and stellarator/helical plasmas. Global AEs and reversed shear AEs, where toroidal couplings are not as dominant were also observed in those plasmas. Helicity induced AEs that exist only in 3D plasmas are observed in the large helical device (LHD) and Wendelstein 7 Advanced Stellarator plasmas. In addition, the geodesic acoustic mode that comes from plasma compressibility is destabilized by energetic ions in both tokamak and LHD plasmas. Nonlinear interaction of these modes and their influence on the confinement of the bulk plasma as well as energetic ions are observed in both plasmas.In this paper, the similarities and differences in these instabilities and their consequences for tokamak and stellarator/helical plasmas are summarized through comparison with the data sets obtained in LHD. In particular, this paper focuses on the differences caused by the rotational transform profile and the 2D or 3D geometrical structure of the plasma equilibrium. Important issues left for future study are listed." @default.
- W1990561437 created "2016-06-24" @default.
- W1990561437 creator A5034696524 @default.
- W1990561437 creator A5036601487 @default.
- W1990561437 creator A5061571214 @default.
- W1990561437 creator A5068064548 @default.
- W1990561437 creator A5074147939 @default.
- W1990561437 creator A5083138674 @default.
- W1990561437 date "2011-01-20" @default.
- W1990561437 modified "2023-10-01" @default.
- W1990561437 title "Energetic-ion-driven global instabilities in stellarator/helical plasmas and comparison with tokamak plasmas" @default.
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