Tokamak high-confinement regimes are normally affected by the presence of often violent edge localised modes (ELMs). ELMs deposit unacceptable peak heat loads causing a severe deterioration of the plasma facing components. Although several ELM control/suppression techniques have been developed, they may not be applicable to future reactors such as ITER and DEMO. Thus a vivid interest has arisen on the development of naturally ELM-free regimes. One of the most promising of such regimes is the so called quiescent high-confinement (QH) mode. In QH plasmas, ELM activity is replaced by dominantly low-n steady mild rotating MHD edge harmonic oscillations (EHOs) localised in the pedestal region. EHOs have been observed in DIII-D, ASDEX-U, JET and JT60 [1]. In JET such a MHD activity is referred to as Outer Modes (OMs) [2].
Theory based investigation of Outer Mode to ELM transition in JET-C plasmas
Brunetti D.; Graves J.P.; Lazzaro E.; Mariani A.; Nowak S.; Cooper W.A.; Wahlberg C.; Solano E.R.; Saarelma S.; JET Contributors
ID | 405024 |
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PRODUCT TYPE | Conference Proceeding |
LAST UPDATE | 2023-02-08T08:39:26Z |
EU PROJECT | EUROfusion |
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TITLE | Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium |
FOUNDING PROGRAM | H2020 |