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Dimensionless scaling of the critical beta for onset of a neoclassical tearing mode

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Dimensionless scaling of the critical beta for onset of a neoclassical tearing mode. / La Haye, R J ; Buttery, R J ; Guenter, S ; Huysmans, G T A ; Maraschek, M ; Wilson, H R .

In: Physics of Plasmas, Vol. 7, No. 8, 08.2000, p. 3349-3359.

Research output: Contribution to journalArticle

Harvard

La Haye, RJ, Buttery, RJ, Guenter, S, Huysmans, GTA, Maraschek, M & Wilson, HR 2000, 'Dimensionless scaling of the critical beta for onset of a neoclassical tearing mode', Physics of Plasmas, vol. 7, no. 8, pp. 3349-3359.

APA

La Haye, R. J., Buttery, R. J., Guenter, S., Huysmans, G. T. A., Maraschek, M., & Wilson, H. R. (2000). Dimensionless scaling of the critical beta for onset of a neoclassical tearing mode. Physics of Plasmas, 7(8), 3349-3359.

Vancouver

La Haye RJ, Buttery RJ, Guenter S, Huysmans GTA, Maraschek M, Wilson HR. Dimensionless scaling of the critical beta for onset of a neoclassical tearing mode. Physics of Plasmas. 2000 Aug;7(8):3349-3359.

Author

La Haye, R J ; Buttery, R J ; Guenter, S ; Huysmans, G T A ; Maraschek, M ; Wilson, H R . / Dimensionless scaling of the critical beta for onset of a neoclassical tearing mode. In: Physics of Plasmas. 2000 ; Vol. 7, No. 8. pp. 3349-3359.

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@article{77262a56dda94090943b86a73848ba2d,
title = "Dimensionless scaling of the critical beta for onset of a neoclassical tearing mode",
abstract = "The islands from tearing modes driven unstable and sustained by the helically perturbed neoclassical bootstrap current often provide the practical limit to long-pulse, high confinement tokamak operation. The destabilization of such {"}metastable{"} plasmas depends on a {"}seed{"} island exceeding a threshold. A database from similar regimes [high confinement H-mode with periodic edge localized modes (ELMs) and periodic central sawteeth] was compiled from the tokamaks ASDEX Upgrade (AUG) [Plasma Phys. Controlled Fusion 41, 767 (1999)], DIII-D [Nucl. Fusion 38, 987 (1998)], and JET (Joint European Torus) [Plasma Phys. Controlled Fusion 41, B1 (1999)]. A comparison is made of the measured critical beta for onset of the m/n=3/2 mode (m and n being the poloidal and toroidal Fourier harmonics, respectively) to a model in terms of dimensionless parameters for the seed and threshold islands. This modeling is then used for extrapolation to a reactor-grade tokamak design such as ITER/FDR (International Thermonuclear Experimental Reactor/Final Design Report) [Nucl. Fusion 39, 2137 (1999)]; this indicates that the seed island from sawteeth could be too small to sufficiently disturb the metastable plasma and excite the m/n=3/2 neoclassical tearing mode. (C) 2000 American Institute of Physics. [S1070- 664X(00)02408-3].",
author = "{La Haye}, {R J} and Buttery, {R J} and S Guenter and Huysmans, {G T A} and M Maraschek and Wilson, {H R}",
year = "2000",
month = "8",
language = "English",
volume = "7",
pages = "3349--3359",
journal = "Physics of Plasmas",
issn = "1070-664X",
publisher = "American Institute of Physics Publising LLC",
number = "8",

}

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TY - JOUR

T1 - Dimensionless scaling of the critical beta for onset of a neoclassical tearing mode

AU - La Haye, R J

AU - Buttery, R J

AU - Guenter, S

AU - Huysmans, G T A

AU - Maraschek, M

AU - Wilson, H R

PY - 2000/8

Y1 - 2000/8

N2 - The islands from tearing modes driven unstable and sustained by the helically perturbed neoclassical bootstrap current often provide the practical limit to long-pulse, high confinement tokamak operation. The destabilization of such "metastable" plasmas depends on a "seed" island exceeding a threshold. A database from similar regimes [high confinement H-mode with periodic edge localized modes (ELMs) and periodic central sawteeth] was compiled from the tokamaks ASDEX Upgrade (AUG) [Plasma Phys. Controlled Fusion 41, 767 (1999)], DIII-D [Nucl. Fusion 38, 987 (1998)], and JET (Joint European Torus) [Plasma Phys. Controlled Fusion 41, B1 (1999)]. A comparison is made of the measured critical beta for onset of the m/n=3/2 mode (m and n being the poloidal and toroidal Fourier harmonics, respectively) to a model in terms of dimensionless parameters for the seed and threshold islands. This modeling is then used for extrapolation to a reactor-grade tokamak design such as ITER/FDR (International Thermonuclear Experimental Reactor/Final Design Report) [Nucl. Fusion 39, 2137 (1999)]; this indicates that the seed island from sawteeth could be too small to sufficiently disturb the metastable plasma and excite the m/n=3/2 neoclassical tearing mode. (C) 2000 American Institute of Physics. [S1070- 664X(00)02408-3].

AB - The islands from tearing modes driven unstable and sustained by the helically perturbed neoclassical bootstrap current often provide the practical limit to long-pulse, high confinement tokamak operation. The destabilization of such "metastable" plasmas depends on a "seed" island exceeding a threshold. A database from similar regimes [high confinement H-mode with periodic edge localized modes (ELMs) and periodic central sawteeth] was compiled from the tokamaks ASDEX Upgrade (AUG) [Plasma Phys. Controlled Fusion 41, 767 (1999)], DIII-D [Nucl. Fusion 38, 987 (1998)], and JET (Joint European Torus) [Plasma Phys. Controlled Fusion 41, B1 (1999)]. A comparison is made of the measured critical beta for onset of the m/n=3/2 mode (m and n being the poloidal and toroidal Fourier harmonics, respectively) to a model in terms of dimensionless parameters for the seed and threshold islands. This modeling is then used for extrapolation to a reactor-grade tokamak design such as ITER/FDR (International Thermonuclear Experimental Reactor/Final Design Report) [Nucl. Fusion 39, 2137 (1999)]; this indicates that the seed island from sawteeth could be too small to sufficiently disturb the metastable plasma and excite the m/n=3/2 neoclassical tearing mode. (C) 2000 American Institute of Physics. [S1070- 664X(00)02408-3].

M3 - Article

VL - 7

SP - 3349

EP - 3359

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 8

ER -