Ion heat transport studies in JET

JET-EFDA collaborators

    Research output: Contribution to journalArticleScientificpeer-review

    19 Citations (Scopus)

    Abstract

    Detailed experimental studies of ion heat transport have been carried out in JET exploiting the upgrade of active charge exchange spectroscopy and the availability of multi-frequency ion cyclotron resonance heating with 3He minority. The determination of ion temperature gradient (ITG) threshold and ion stiffness offers unique opportunities for validation of the well-established theory of ITG driven modes. Ion stiffness is observed to decrease strongly in the presence of toroidal rotation when the magnetic shear is sufficiently low. This effect is dominant with respect to the well-known ω E×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of T e/T i and s/q on ion threshold are found rather weak in the domain explored. Quasi-linear fluid/gyro-fluid and linear/non-linear gyro-kinetic simulations have been carried out. Whilst threshold predictions show good match with experimental observations, some significant discrepancies are found on the stiffness behaviour.

    Original languageEnglish
    Article number124033
    Number of pages17
    JournalPlasma Physics and Controlled Fusion
    Volume53
    Issue number12
    DOIs
    Publication statusPublished - 1 Dec 2011
    MoE publication typeNot Eligible
    Event38th EPS Conference on Plasma Physics - Strasbourg, France
    Duration: 27 Jun 20111 Jul 2011

    Fingerprint

    heat
    Ions
    stiffness
    ions
    thresholds
    ion temperature
    temperature gradients
    Stiffness
    Thermal gradients
    fluids
    minorities
    cyclotron resonance
    charge exchange
    Cyclotron resonance
    Fluids
    availability
    Hot Temperature
    shear
    Ion exchange
    heating

    Cite this

    JET-EFDA collaborators. / Ion heat transport studies in JET. In: Plasma Physics and Controlled Fusion. 2011 ; Vol. 53, No. 12.
    @article{3cdf7be806dc45dc8b479b5c8c51a969,
    title = "Ion heat transport studies in JET",
    abstract = "Detailed experimental studies of ion heat transport have been carried out in JET exploiting the upgrade of active charge exchange spectroscopy and the availability of multi-frequency ion cyclotron resonance heating with 3He minority. The determination of ion temperature gradient (ITG) threshold and ion stiffness offers unique opportunities for validation of the well-established theory of ITG driven modes. Ion stiffness is observed to decrease strongly in the presence of toroidal rotation when the magnetic shear is sufficiently low. This effect is dominant with respect to the well-known ω E×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of T e/T i and s/q on ion threshold are found rather weak in the domain explored. Quasi-linear fluid/gyro-fluid and linear/non-linear gyro-kinetic simulations have been carried out. Whilst threshold predictions show good match with experimental observations, some significant discrepancies are found on the stiffness behaviour.",
    author = "P. Mantica and C. Angioni and B. Baiocchi and M. Baruzzo and M. Beurskens and J.P.S. Bizarro and R. Budny and P. Buratti and A. Casati and C. Challis and J. Citrin and G. Colyer and F. Crisanti and A. Figueiredo and L. Frassinetti and C. Giroud and Hawkes, {N. C.} and J. Hobirk and E. Joffrin and T. Johnson and E. Lerche and P. Migliano and V. Naulin and Peeters, {A. G.} and G. Rewoldt and F. Ryter and Antti Salmi and R. Sartori and C. Sozzi and G. Staebler and D. Strintzi and Tuomas Tala and M. Tsalas and {Van Eester}, D. and T. Versloot and P.C. Devries and J. Weiland and {JET-EFDA collaborators}",
    year = "2011",
    month = "12",
    day = "1",
    doi = "10.1088/0741-3335/53/12/124033",
    language = "English",
    volume = "53",
    journal = "Plasma Physics and Controlled Fusion",
    issn = "0741-3335",
    publisher = "Institute of Physics IOP",
    number = "12",

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    Ion heat transport studies in JET. / JET-EFDA collaborators.

    In: Plasma Physics and Controlled Fusion, Vol. 53, No. 12, 124033, 01.12.2011.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Ion heat transport studies in JET

    AU - Mantica, P.

    AU - Angioni, C.

    AU - Baiocchi, B.

    AU - Baruzzo, M.

    AU - Beurskens, M.

    AU - Bizarro, J.P.S.

    AU - Budny, R.

    AU - Buratti, P.

    AU - Casati, A.

    AU - Challis, C.

    AU - Citrin, J.

    AU - Colyer, G.

    AU - Crisanti, F.

    AU - Figueiredo, A.

    AU - Frassinetti, L.

    AU - Giroud, C.

    AU - Hawkes, N. C.

    AU - Hobirk, J.

    AU - Joffrin, E.

    AU - Johnson, T.

    AU - Lerche, E.

    AU - Migliano, P.

    AU - Naulin, V.

    AU - Peeters, A. G.

    AU - Rewoldt, G.

    AU - Ryter, F.

    AU - Salmi, Antti

    AU - Sartori, R.

    AU - Sozzi, C.

    AU - Staebler, G.

    AU - Strintzi, D.

    AU - Tala, Tuomas

    AU - Tsalas, M.

    AU - Van Eester, D.

    AU - Versloot, T.

    AU - Devries, P.C.

    AU - Weiland, J.

    AU - JET-EFDA collaborators

    PY - 2011/12/1

    Y1 - 2011/12/1

    N2 - Detailed experimental studies of ion heat transport have been carried out in JET exploiting the upgrade of active charge exchange spectroscopy and the availability of multi-frequency ion cyclotron resonance heating with 3He minority. The determination of ion temperature gradient (ITG) threshold and ion stiffness offers unique opportunities for validation of the well-established theory of ITG driven modes. Ion stiffness is observed to decrease strongly in the presence of toroidal rotation when the magnetic shear is sufficiently low. This effect is dominant with respect to the well-known ω E×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of T e/T i and s/q on ion threshold are found rather weak in the domain explored. Quasi-linear fluid/gyro-fluid and linear/non-linear gyro-kinetic simulations have been carried out. Whilst threshold predictions show good match with experimental observations, some significant discrepancies are found on the stiffness behaviour.

    AB - Detailed experimental studies of ion heat transport have been carried out in JET exploiting the upgrade of active charge exchange spectroscopy and the availability of multi-frequency ion cyclotron resonance heating with 3He minority. The determination of ion temperature gradient (ITG) threshold and ion stiffness offers unique opportunities for validation of the well-established theory of ITG driven modes. Ion stiffness is observed to decrease strongly in the presence of toroidal rotation when the magnetic shear is sufficiently low. This effect is dominant with respect to the well-known ω E×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of T e/T i and s/q on ion threshold are found rather weak in the domain explored. Quasi-linear fluid/gyro-fluid and linear/non-linear gyro-kinetic simulations have been carried out. Whilst threshold predictions show good match with experimental observations, some significant discrepancies are found on the stiffness behaviour.

    U2 - 10.1088/0741-3335/53/12/124033

    DO - 10.1088/0741-3335/53/12/124033

    M3 - Article

    AN - SCOPUS:83755169509

    VL - 53

    JO - Plasma Physics and Controlled Fusion

    JF - Plasma Physics and Controlled Fusion

    SN - 0741-3335

    IS - 12

    M1 - 124033

    ER -