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

doi:10.1103/PhysRevLett.87.115001

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

Culham Science Centre
Princeton University
Max-Planck-Institut für Plasmaphysik (IPP)
ENEA - Ricerca sul Sistema Elettrico (ERSE) SpA.
CEA Saclay
KTH Royal Institute of Technology
Universidade de Lisboa
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT)

Research output: Contribution to journal › Article › Scientific › peer-review

115 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 language	English
Article number	115001
Journal	Physical Review Letters
Volume	87
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.87.115001
Publication status	Published - 2001
MoE publication type	A1 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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10.1103/PhysRevLett.87.115001

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), Article 115001. https://doi.org/10.1103/PhysRevLett.87.115001

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

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",

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doi = "10.1103/PhysRevLett.87.115001",

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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

TY - JOUR

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

N2 - 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.

AB - 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.

KW - JET

KW - Tokamak

KW - lower hybrid heating and current drive

KW - current drive

KW - lower hybrid current drive

KW - fusion energy

KW - fusion reactors

UR - https://www.scopus.com/pages/publications/85037228139

U2 - 10.1103/PhysRevLett.87.115001

DO - 10.1103/PhysRevLett.87.115001

M3 - Article

SN - 0031-9007

VL - 87

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

M1 - 115001

ER -

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

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Keywords

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