Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade

Labit, B. and Eich, T. and Harrer, G.F. and Gahle, D. and Henderson, S., EUROfusion MST1 Team (2019) Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade. Nuclear Fusion, 59 (8). 086020. ISSN 0029-5515 (https://doi.org/10.1088/1741-4326/ab2211)

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Abstract

Within the EUROfusion MST1 work package, a series of experiments has been conducted on AUG and TCV devices to disentangle the role of plasma fueling and plasma shape for the onset of small ELM regimes. On both devices, small ELM regimes with high confinement are achieved if and only if two conditions are fulfilled at the same time. Firstly, the plasma density at the separatrix must be large enough (n e,sep/n G ∼ 0.3), leading to a pressure profile flattening at the separatrix, which stabilizes type-I ELMs. Secondly, the magnetic configuration has to be close to a double null (DN), leading to a reduction of the magnetic shear in the extreme vicinity of the separatrix. As a consequence, its stabilizing effect on ballooning modes is weakened.

  • Item type:Article
    ID code:71040
    Dates:
    Date
    Event
    26 June 2019
    Published
    16 May 2019
    Published Online
    16 May 2019
    Accepted
    Notes:This research article is authored by numerous individuals. Please consult the manuscript for full attribution details.
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:06 Jan 2020 12:16
    Last modified:14 Apr 2024 14:41
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/71040
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