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research article
Control of neoclassical tearing modes by sawtooth control
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.
Type
research article
Web of Science ID
WOS:000174342000033
Authors
•
Westerhof, E.
•
Mayoral, M. L.
•
Alper, B.
•
Belo, P. A.
•
Buttery, R. J.
•
Gondhalekar, A.
•
Hellsten, T.
•
Hender, T. C.
•
Howell, D. F.
Publication date
2002
Published in
Volume
88
Issue
10
Article Number
105001
Peer reviewed
REVIEWED
Available on Infoscience
April 16, 2008
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