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

Research output: Contribution to journalArticleScientificpeer-review

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

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current density
heating
shear
simulation

Keywords

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

Cite this

Hawkes, N. ; Stratton, B. ; Tala, Tuomas ; 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. / Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive. In: Physical Review Letters. 2001 ; Vol. 87, No. 11.
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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.",
keywords = "JET, Tokamak, lower hybrid heating and current drive, current drive, lower hybrid current drive, fusion energy, fusion reactors",
author = "N. Hawkes and B. Stratton and Tuomas Tala and C. Challis and G. Conway and R. DeAngelis and C. Giroud and J. Hobirk and E. Joffrin and P. Lomas and P. Lotte and J. Mailloux and E. Rachlew and S. Reyes-Cortes and E. Solano and K.-D. Zastrow",
year = "2001",
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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, vol. 87, no. 11, 115001. https://doi.org/10.1103/PhysRevLett.87.115001

Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive. / Hawkes, N.; Stratton, B.; Tala, Tuomas; 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.

In: Physical Review Letters, Vol. 87, No. 11, 115001, 2001.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Observation of zero current density in the core of JET discharges with lower hybrid heating and current drive

AU - Hawkes, N.

AU - Stratton, B.

AU - Tala, Tuomas

AU - Challis, C.

AU - Conway, G.

AU - DeAngelis, R.

AU - Giroud, C.

AU - Hobirk, J.

AU - Joffrin, E.

AU - Lomas, P.

AU - Lotte, P.

AU - Mailloux, J.

AU - Rachlew, E.

AU - Reyes-Cortes, S.

AU - Solano, E.

AU - Zastrow, K.-D.

PY - 2001

Y1 - 2001

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KW - lower hybrid heating and current drive

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