Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current

J. Bizarro, X. Litaudon, Tuomas Tala

    Research output: Contribution to journalArticleScientificpeer-review

    13 Citations (Scopus)

    Abstract

    It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E × B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.
    Original languageEnglish
    Pages (from-to)L41-L45
    JournalNuclear Fusion
    Volume47
    Issue number11
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed

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    oscillations
    beam injection
    neutral beams
    cyclotron resonance
    heating
    shear flow
    ions
    modules
    shear
    profiles
    simulation

    Cite this

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    title = "Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current",
    abstract = "It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E × B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.",
    author = "J. Bizarro and X. Litaudon and Tuomas Tala",
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    Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current. / Bizarro, J.; Litaudon, X.; Tala, Tuomas.

    In: Nuclear Fusion, Vol. 47, No. 11, 2007, p. L41-L45.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current

    AU - Bizarro, J.

    AU - Litaudon, X.

    AU - Tala, Tuomas

    PY - 2007

    Y1 - 2007

    N2 - It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E × B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.

    AB - It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E × B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.

    U2 - 10.1088/0029-5515/47/11/L03

    DO - 10.1088/0029-5515/47/11/L03

    M3 - Article

    VL - 47

    SP - L41-L45

    JO - Nuclear Fusion

    JF - Nuclear Fusion

    SN - 0029-5515

    IS - 11

    ER -