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EVANS, T. E; MOYER, R. A; GROTH, M; HARRIS, J. H; LA HAYE, R. J; LASNIER, C. J; MASUZAKI, S; OHYABU, N; PRETTY, D. G; RHODES, T. L; REIMERDES, H; RUDAKOV, D. L; THOMAS, P. R; SCHAFFER, M. J; WANG, G; ZENG, L; WATKINS, J. G; OSBORNE, T. H; BOEDO, J. A; DOYLE, E. J; FENSTERMACHER, M. E; FINKEN, K. H; GROEBNER, R. J
Physical review letters, 06/2004, Letnik: 92, Številka: 23Journal Article
A stochastic magnetic boundary, produced by an applied edge resonant magnetic perturbation, is used to suppress most large edge-localized modes (ELMs) in high confinement (H-mode) plasmas. The resulting H mode displays rapid, small oscillations with a bursty character modulated by a coherent 130 Hz envelope. The H mode transport barrier and core confinement are unaffected by the stochastic boundary, despite a threefold drop in the toroidal rotation. These results demonstrate that stochastic boundaries are compatible with H modes and may be attractive for ELM control in next-step fusion tokamaks.
