Control of Neoclassical Tearing Modes by Sawtooth Control

O. Sauter; E. Westerhof; M. L. Mayoral; B. Alper; P. A. Belo; R. J. Buttery; A. Gondhalekar; T. Hellsten; T. C. Hender; D. F. Howell; T. Johnson; P. Lamalle; M. J. Mantsinen; F. Milani; M. F.F. Nave; F. Nguyen; A. L. Pecquet; S. D. Pinches; S. Podda; J. Rapp

doi:10.1103/PhysRevLett.88.105001

Control of Neoclassical Tearing Modes by Sawtooth Control

O. Sauter, E. Westerhof, M. L. Mayoral, B. Alper, P. A. Belo, R. J. Buttery, A. Gondhalekar, T. Hellsten, T. C. Hender, D. F. Howell, T. Johnson, P. Lamalle, M. J. Mantsinen, F. Milani, M. F.F. Nave, F. Nguyen, A. L. Pecquet, S. D. Pinches, S. Podda, J. Rapp

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

17 Scopus citations

Abstract

The onset of a neoclassical tearing mode (NTM) depends on the existence of a large enough seed island. It is shown in the Joint European Torus that NTMs can be readily destabilized by long-period sawteeth, such as obtained by sawtooth stabilization from ion-cyclotron heating or current drive. This has important implications for burning plasma scenarios, as alpha particles strongly stabilize the sawteeth. It is also shown that, by adding heating and current drive just outside the inversion radius, sawteeth are destabilized, resulting in shorter sawtooth periods and larger beta values being obtained without NTMs.

Original language	English
Pages (from-to)	4
Number of pages	1
Journal	Physical Review Letters
Volume	88
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.88.105001
State	Published - 2002
Externally published	Yes

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Sauter, O., Westerhof, E., Mayoral, M. L., Alper, B., Belo, P. A., Buttery, R. J., Gondhalekar, A., Hellsten, T., Hender, T. C., Howell, D. F., Johnson, T., Lamalle, P., Mantsinen, M. J., Milani, F., Nave, M. F. F., Nguyen, F., Pecquet, A. L., Pinches, S. D., Podda, S., & Rapp, J. (2002). Control of Neoclassical Tearing Modes by Sawtooth Control. Physical Review Letters, 88(10), 4. https://doi.org/10.1103/PhysRevLett.88.105001

@article{b4c177bfee784bd282c406dd85d84ce7,

title = "Control of Neoclassical Tearing Modes by Sawtooth Control",

abstract = "The onset of a neoclassical tearing mode (NTM) depends on the existence of a large enough seed island. It is shown in the Joint European Torus that NTMs can be readily destabilized by long-period sawteeth, such as obtained by sawtooth stabilization from ion-cyclotron heating or current drive. This has important implications for burning plasma scenarios, as alpha particles strongly stabilize the sawteeth. It is also shown that, by adding heating and current drive just outside the inversion radius, sawteeth are destabilized, resulting in shorter sawtooth periods and larger beta values being obtained without NTMs.",

author = "O. Sauter and E. Westerhof and Mayoral, {M. L.} and B. Alper and Belo, {P. A.} and Buttery, {R. J.} and A. Gondhalekar and T. Hellsten and Hender, {T. C.} and Howell, {D. F.} and T. Johnson and P. Lamalle and Mantsinen, {M. J.} and F. Milani and Nave, {M. F.F.} and F. Nguyen and Pecquet, {A. L.} and Pinches, {S. D.} and S. Podda and J. Rapp",

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doi = "10.1103/PhysRevLett.88.105001",

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Sauter, O, Westerhof, E, Mayoral, ML, Alper, B, Belo, PA, Buttery, RJ, Gondhalekar, A, Hellsten, T, Hender, TC, Howell, DF, Johnson, T, Lamalle, P, Mantsinen, MJ, Milani, F, Nave, MFF, Nguyen, F, Pecquet, AL, Pinches, SD, Podda, S & Rapp, J 2002, 'Control of Neoclassical Tearing Modes by Sawtooth Control', Physical Review Letters, vol. 88, no. 10, pp. 4. https://doi.org/10.1103/PhysRevLett.88.105001

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T1 - Control of Neoclassical Tearing Modes by Sawtooth Control

AU - Sauter, O.

AU - Westerhof, E.

AU - Mayoral, M. L.

AU - Alper, B.

AU - Belo, P. A.

AU - Buttery, R. J.

AU - Gondhalekar, A.

AU - Hellsten, T.

AU - Hender, T. C.

AU - Howell, D. F.

AU - Johnson, T.

AU - Lamalle, P.

AU - Mantsinen, M. J.

AU - Milani, F.

AU - Nave, M. F.F.

AU - Nguyen, F.

AU - Pecquet, A. L.

AU - Pinches, S. D.

AU - Podda, S.

AU - Rapp, J.

PY - 2002

Y1 - 2002

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AB - The onset of a neoclassical tearing mode (NTM) depends on the existence of a large enough seed island. It is shown in the Joint European Torus that NTMs can be readily destabilized by long-period sawteeth, such as obtained by sawtooth stabilization from ion-cyclotron heating or current drive. This has important implications for burning plasma scenarios, as alpha particles strongly stabilize the sawteeth. It is also shown that, by adding heating and current drive just outside the inversion radius, sawteeth are destabilized, resulting in shorter sawtooth periods and larger beta values being obtained without NTMs.

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VL - 88

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Control of Neoclassical Tearing Modes by Sawtooth Control

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