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Study of stability and rotation of a chain of saturated, freely-rotating magnetic islands in tokamaks

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    SYSNO ASEP0543310
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleStudy of stability and rotation of a chain of saturated, freely-rotating magnetic islands in tokamaks
    Author(s) Casolari, Andrea (UFP-V)
    Ficker, Ondřej (UFP-V) ORCID
    Grover, Ondřej (UFP-V) ORCID
    Jaulmes, Fabien (UFP-V) ORCID
    Kripner, Lukáš (UFP-V) ORCID
    Macúšová, Eva (UFP-V) ORCID
    Markovič, Tomáš (UFP-V) RID
    Peterka, Matěj (UFP-V) RID, ORCID
    Yanovskiy, Vadim (UFP-V) ORCID
    Number of authors9
    Article number074004
    Source TitlePlasma Physics and Controlled Fusion - ISSN 0741-3335
    Roč. 63, č. 7 (2021)
    Number of pages16 s.
    Languageeng - English
    CountryGB - United Kingdom
    Keywordsinstabilities ; magnetic islands ; stability ; rotation ; nonlinear ; theory ; measurements
    Subject RIVBL - Plasma and Gas Discharge Physics
    OECD categoryFluids and plasma physics (including surface physics)
    R&D ProjectsGA18-02482S GA ČR - Czech Science Foundation (CSF)
    8D15001 GA MŠk - Ministry of Education, Youth and Sports (MEYS)
    LM2018117 GA MŠk - Ministry of Education, Youth and Sports (MEYS)
    EF16_019/0000768 GA MŠk - Ministry of Education, Youth and Sports (MEYS)
    Method of publishingLimited access
    Institutional supportUFP-V - RVO:61389021
    UT WOS000657941000001
    DOI10.1088/1361-6587/abfbbd
    AnnotationThe non-linear dynamics of a chain of stationary, saturated magnetic islands is studied by solving a four-field system of equations that include non-ideal effects, lowest order finite Larmor radius corrections and neoclassical terms. The magnetic island rotation velocity is calculated self-consistently with the fields profiles. The solutions for the island rotation velocity and for the ion polarization current are determined as a function of the characteristic parameters of the system and the results are discussed. The results of the calculations show that island rotation velocity and the ion polarization current depend in a non-trivial way on the parameters characterizing the system, and some clear patterns emerge only in particular cases. An analysis of magnetic island rotation velocity is performed on experiments in COMPASS tokamak. Measured island rotation velocity is compared with the calculated ion and electron flow velocities, for different hypotheses on the toroidal rotation of the plasma. The comparison shows that the island rotation velocity is consistent with the ion flow velocity, under the hypothesis of slow toroidal rotation and low collisionality. Theoretical calculation of the island rotation velocity according to the model here developed suggests that the islands rotate weakly in the ion direction, in the hypothesis of slow toroidal rotation and high collisionality. The impossibility of directly measuring the plasma rotation velocity makes it difficult to distinguish between these different regimes.
    WorkplaceInstitute of Plasma Physics
    ContactVladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
    Year of Publishing2022
    Electronic addresshttps://iopscience.iop.org/article/10.1088/1361-6587/abfbbd
Number of the records: 1