Evolution of the radial electric field in a JET H-mode plasma

Y. Andrew, N.C. Hawkes, T. Biewer, K. Crombe, D. Keeling, E. De La Luna, C. Giroud, A. Korotkov, A. Meigs, A. Murari, I. Nunes, R. Sartori, Tuomas Tala, JET-EFDA Contributors

    Research output: Contribution to journalArticleScientificpeer-review

    17 Citations (Scopus)

    Abstract

    Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of ±9 km s- 1. Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas.
    Original languageEnglish
    Article number15003
    JournalEurophysics Letters
    Volume83
    Issue number1
    DOIs
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Joint European Torus
    electric fields
    profiles
    ion temperature
    destruction
    fusion
    shear
    impurities
    carbon
    ions
    energy

    Keywords

    • plasma
    • fusion plasma
    • JET
    • fusion energy
    • plasma toroidal confinement
    • poloidal momentum transport
    • poloidal velocity
    • tokamak

    Cite this

    Andrew, Y., Hawkes, N. C., Biewer, T., Crombe, K., Keeling, D., De La Luna, E., ... JET-EFDA Contributors (2008). Evolution of the radial electric field in a JET H-mode plasma. Europhysics Letters, 83(1), [15003]. https://doi.org/10.1209/0295-5075/83/15003
    Andrew, Y. ; Hawkes, N.C. ; Biewer, T. ; Crombe, K. ; Keeling, D. ; De La Luna, E. ; Giroud, C. ; Korotkov, A. ; Meigs, A. ; Murari, A. ; Nunes, I. ; Sartori, R. ; Tala, Tuomas ; JET-EFDA Contributors. / Evolution of the radial electric field in a JET H-mode plasma. In: Europhysics Letters. 2008 ; Vol. 83, No. 1.
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    title = "Evolution of the radial electric field in a JET H-mode plasma",
    abstract = "Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of ±9 km s- 1. Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas.",
    keywords = "plasma, fusion plasma, JET, fusion energy, plasma toroidal confinement, poloidal momentum transport, poloidal velocity, tokamak",
    author = "Y. Andrew and N.C. Hawkes and T. Biewer and K. Crombe and D. Keeling and {De La Luna}, E. and C. Giroud and A. Korotkov and A. Meigs and A. Murari and I. Nunes and R. Sartori and Tuomas Tala and {JET-EFDA Contributors}",
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    Andrew, Y, Hawkes, NC, Biewer, T, Crombe, K, Keeling, D, De La Luna, E, Giroud, C, Korotkov, A, Meigs, A, Murari, A, Nunes, I, Sartori, R, Tala, T & JET-EFDA Contributors 2008, 'Evolution of the radial electric field in a JET H-mode plasma', Europhysics Letters, vol. 83, no. 1, 15003. https://doi.org/10.1209/0295-5075/83/15003

    Evolution of the radial electric field in a JET H-mode plasma. / Andrew, Y.; Hawkes, N.C.; Biewer, T.; Crombe, K.; Keeling, D.; De La Luna, E.; Giroud, C.; Korotkov, A.; Meigs, A.; Murari, A.; Nunes, I.; Sartori, R.; Tala, Tuomas; JET-EFDA Contributors.

    In: Europhysics Letters, Vol. 83, No. 1, 15003, 2008.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Evolution of the radial electric field in a JET H-mode plasma

    AU - Andrew, Y.

    AU - Hawkes, N.C.

    AU - Biewer, T.

    AU - Crombe, K.

    AU - Keeling, D.

    AU - De La Luna, E.

    AU - Giroud, C.

    AU - Korotkov, A.

    AU - Meigs, A.

    AU - Murari, A.

    AU - Nunes, I.

    AU - Sartori, R.

    AU - Tala, Tuomas

    AU - JET-EFDA Contributors,

    PY - 2008

    Y1 - 2008

    N2 - Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of ±9 km s- 1. Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas.

    AB - Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of ±9 km s- 1. Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas.

    KW - plasma

    KW - fusion plasma

    KW - JET

    KW - fusion energy

    KW - plasma toroidal confinement

    KW - poloidal momentum transport

    KW - poloidal velocity

    KW - tokamak

    U2 - 10.1209/0295-5075/83/15003

    DO - 10.1209/0295-5075/83/15003

    M3 - Article

    VL - 83

    JO - Europhysics Letters

    JF - Europhysics Letters

    SN - 0295-5075

    IS - 1

    M1 - 15003

    ER -

    Andrew Y, Hawkes NC, Biewer T, Crombe K, Keeling D, De La Luna E et al. Evolution of the radial electric field in a JET H-mode plasma. Europhysics Letters. 2008;83(1). 15003. https://doi.org/10.1209/0295-5075/83/15003