Stabilization of sawteeth with additional heating in the JET tokamak

D. J. Campbell; D. F.H. Start; J. A. Wesson; D. V. Bartlett; V. P. Bhatnagar; M. Bures; J. G. Cordey; G. A. Cottrell; P. A. Dupperex; A. W. Edwards; C. D. Challis; C. Gormezano; C. W. Gowers; R. S. Granetz; J. H. Hammen; T. Hellsten; J. Jacquinot; E. Lazzaro; P. J. Lomas; N. Lopes Cardozo; P. Mantica; J. A. Snipes; D. Stork; P. E. Stott; P. R. Thomas; E. Thompson; K. Thomsen; G. Tonetti

doi:10.1103/PhysRevLett.60.2148

Stabilization of sawteeth with additional heating in the JET tokamak

D. J. Campbell, D. F.H. Start, J. A. Wesson, D. V. Bartlett, V. P. Bhatnagar, M. Bures, J. G. Cordey, G. A. Cottrell, P. A. Dupperex, A. W. Edwards, C. D. Challis, C. Gormezano, C. W. Gowers, R. S. Granetz, J. H. Hammen, T. Hellsten, J. Jacquinot, E. Lazzaro, P. J. Lomas, N. Lopes CardozoP. Mantica, J. A. Snipes, D. Stork, P. E. Stott, P. R. Thomas, E. Thompson, K. Thomsen, G. Tonetti

Laboratory for Plasma Physics

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Abstract

Experiments in the JET tokamak with additional heating power (ion cyclotron resonance heating and/or neutral beam injection) above 5 MW show that the plasma can undergo a transition to a new regime. In this regime, the sawtooth instability is suppressed for periods up to 1.6 s and the level of long-wavelength, coherent MHD activity is very low. An improvement in the global energy confinement time of up to 20% is observed. Possible mechanisms for the stabilization of the m=1 instability and the implications for the near-ignition regime are discussed.

Original language	English
Pages (from-to)	2148-2151
Number of pages	4
Journal	Physical Review Letters
Volume	60
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.60.2148
Publication status	Published - 1988

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10.1103/PhysRevLett.60.2148

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Campbell, D. J., Start, D. F. H., Wesson, J. A., Bartlett, D. V., Bhatnagar, V. P., Bures, M., Cordey, J. G., Cottrell, G. A., Dupperex, P. A., Edwards, A. W., Challis, C. D., Gormezano, C., Gowers, C. W., Granetz, R. S., Hammen, J. H., Hellsten, T., Jacquinot, J., Lazzaro, E., Lomas, P. J., ... Tonetti, G. (1988). Stabilization of sawteeth with additional heating in the JET tokamak. Physical Review Letters, 60(21), 2148-2151. https://doi.org/10.1103/PhysRevLett.60.2148

@article{ab5108f7985543b1aebf2876f1ba71cd,

title = "Stabilization of sawteeth with additional heating in the JET tokamak",

abstract = "Experiments in the JET tokamak with additional heating power (ion cyclotron resonance heating and/or neutral beam injection) above 5 MW show that the plasma can undergo a transition to a new regime. In this regime, the sawtooth instability is suppressed for periods up to 1.6 s and the level of long-wavelength, coherent MHD activity is very low. An improvement in the global energy confinement time of up to 20% is observed. Possible mechanisms for the stabilization of the m=1 instability and the implications for the near-ignition regime are discussed.",

author = "Campbell, {D. J.} and Start, {D. F.H.} and Wesson, {J. A.} and Bartlett, {D. V.} and Bhatnagar, {V. P.} and M. Bures and Cordey, {J. G.} and Cottrell, {G. A.} and Dupperex, {P. A.} and Edwards, {A. W.} and Challis, {C. D.} and C. Gormezano and Gowers, {C. W.} and Granetz, {R. S.} and Hammen, {J. H.} and T. Hellsten and J. Jacquinot and E. Lazzaro and Lomas, {P. J.} and Cardozo, {N. Lopes} and P. Mantica and Snipes, {J. A.} and D. Stork and Stott, {P. E.} and Thomas, {P. R.} and E. Thompson and K. Thomsen and G. Tonetti",

year = "1988",

doi = "10.1103/PhysRevLett.60.2148",

language = "English",

volume = "60",

pages = "2148--2151",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "21",

}

Campbell, DJ, Start, DFH, Wesson, JA, Bartlett, DV, Bhatnagar, VP, Bures, M, Cordey, JG, Cottrell, GA, Dupperex, PA, Edwards, AW, Challis, CD, Gormezano, C, Gowers, CW, Granetz, RS, Hammen, JH, Hellsten, T, Jacquinot, J, Lazzaro, E, Lomas, PJ, Cardozo, NL, Mantica, P, Snipes, JA, Stork, D, Stott, PE, Thomas, PR, Thompson, E, Thomsen, K & Tonetti, G 1988, 'Stabilization of sawteeth with additional heating in the JET tokamak', Physical Review Letters, vol. 60, no. 21, pp. 2148-2151. https://doi.org/10.1103/PhysRevLett.60.2148

TY - JOUR

T1 - Stabilization of sawteeth with additional heating in the JET tokamak

AU - Campbell, D. J.

AU - Start, D. F.H.

AU - Wesson, J. A.

AU - Bartlett, D. V.

AU - Bhatnagar, V. P.

AU - Bures, M.

AU - Cordey, J. G.

AU - Cottrell, G. A.

AU - Dupperex, P. A.

AU - Edwards, A. W.

AU - Challis, C. D.

AU - Gormezano, C.

AU - Gowers, C. W.

AU - Granetz, R. S.

AU - Hammen, J. H.

AU - Hellsten, T.

AU - Jacquinot, J.

AU - Lazzaro, E.

AU - Lomas, P. J.

AU - Cardozo, N. Lopes

AU - Mantica, P.

AU - Snipes, J. A.

AU - Stork, D.

AU - Stott, P. E.

AU - Thomas, P. R.

AU - Thompson, E.

AU - Thomsen, K.

AU - Tonetti, G.

PY - 1988

Y1 - 1988

N2 - Experiments in the JET tokamak with additional heating power (ion cyclotron resonance heating and/or neutral beam injection) above 5 MW show that the plasma can undergo a transition to a new regime. In this regime, the sawtooth instability is suppressed for periods up to 1.6 s and the level of long-wavelength, coherent MHD activity is very low. An improvement in the global energy confinement time of up to 20% is observed. Possible mechanisms for the stabilization of the m=1 instability and the implications for the near-ignition regime are discussed.

AB - Experiments in the JET tokamak with additional heating power (ion cyclotron resonance heating and/or neutral beam injection) above 5 MW show that the plasma can undergo a transition to a new regime. In this regime, the sawtooth instability is suppressed for periods up to 1.6 s and the level of long-wavelength, coherent MHD activity is very low. An improvement in the global energy confinement time of up to 20% is observed. Possible mechanisms for the stabilization of the m=1 instability and the implications for the near-ignition regime are discussed.

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U2 - 10.1103/PhysRevLett.60.2148

DO - 10.1103/PhysRevLett.60.2148

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VL - 60

SP - 2148

EP - 2151

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

ER -

Stabilization of sawteeth with additional heating in the JET tokamak

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