https://doi.org/10.1140/epjs/s11734-025-01565-4
Regular Article
Numerical study on the pedestal instability in I–H transition on EAST using BOUT++ code
1
Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China, 230026, Hefei, Anhui, China
2
Institute of Plasma Physics, Chinese Academy of Sciences, 230031, Hefei, Anhui, China
Received:
30
November
2024
Accepted:
4
March
2025
Published online:
27
March
2025
The MHD instabilities during I–H transition on EAST are analyzed based on BOUT++ code. The results of 3-field simulation shows that the I–H transition on EAST is MHD stable with pressure profile even enhanced. While in 6-field simulation, a collapse with an energy loss of 4% show up when temperature is enhanced under DAW case, which means I-mode can be unstable under high-temperature condition when DAW (drift Alfvén wave) terms taken into consideration. A newly observed instability named PBI (pedestal burst instability), which usually happens in the I–H transition, is found to be close to this simulation result both in profiles and phenomenon. It gives us new ways to understand PBIs.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
