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Instantaneous correlation between ELM-like MHD activity and abrupt non-local reduction of transport at internal transport barrier formation in JT-60U high-$$beta$$$$_{p}$$ plasmas

Neudatchin, S.*; Takizuka, Tomonori; Hayashi, Nobuhiko; Isayama, Akihiko; Shirai, Hiroshi; Fujita, Takaaki; Kamada, Yutaka; Koide, Yoshihiko; Ito, Kimitaka*; Miura, Yukitoshi

New type of edge-core instantaneous interplay in JT-60U high-$$beta$$$$_{p}$$ plasmas is found. Abrupt in time and wide in space reduction of electron heat flux in the core (called ITB-event) is correlated in ms timescale with the start of an ELM. This result gives a hint of the control to form the ITB immedeately and non-locally by inducing the ELM-like MHD activity.



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