Edge-Localized Mode

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An Edge-Localized Mode ("ELM") is a disruptive event occurring in the edge region of a tokamak plasma due to the quasi-periodic relaxation of a transport barrier previously formed during an L --> H transition. This phenomenon was first observed in the ASDEX tokamak in 1991 [1].

[1] Wagner, F. et al (1982). Recent results of H-mode studies on ASDEX, Proceedings of the Thirteenth Conference on Plasma Physics and Controlled Nuclear Fusion Research (IAEA, Vienna), vol. I, pp. 277-90.

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