Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive

N. Hawkes, B. Stratton, Tuomas Tala, C. Challis, G. Conway, R. DeAngelis, C. Giroud, J. Hobirk, E. Joffrin, P. Lomas, P. Lotte, J. Mailloux, E. Rachlew, S. Reyes-Cortes, E. Solano, K.-D. Zastrow

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    107 Citations (Scopus)

    Abstract

    Simultaneous current ramping and application of lower hybrid heating and current drive (LHCD) have produced a region with zero current density within measurement errors in the core (r/a≤0.2) of JET tokamak optimized shear discharges. The reduction of core current density is consistent with a simple physical explanation and numerical simulations of radial current diffusion including the effects of LHCD. However, the core current density is clamped at zero, indicating the existence of a physical mechanism which prevents it from becoming negative.
    Original languageEnglish
    Article number115001
    JournalPhysical Review Letters
    Volume87
    Issue number11
    DOIs
    Publication statusPublished - 2001
    MoE publication typeA1 Journal article-refereed

    Keywords

    • JET
    • Tokamak
    • lower hybrid heating and current drive
    • current drive
    • lower hybrid current drive
    • fusion energy
    • fusion reactors

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  • Cite this

    Hawkes, N., Stratton, B., Tala, T., Challis, C., Conway, G., DeAngelis, R., Giroud, C., Hobirk, J., Joffrin, E., Lomas, P., Lotte, P., Mailloux, J., Rachlew, E., Reyes-Cortes, S., Solano, E., & Zastrow, K-D. (2001). Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive. Physical Review Letters, 87(11), [115001]. https://doi.org/10.1103/PhysRevLett.87.115001