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Control of neoclassical tearing modes by sawtooth control
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2002 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 88, no 10Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2002. Vol. 88, no 10
Keyword [en]
beta-limit, tokamak, jet
Identifiers
URN: urn:nbn:se:kth:diva-21378DOI: 10.1103/PhysRevLett.88.105001ISI: 000174342000033OAI: oai:DiVA.org:kth-21378DiVA: diva2:340076
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Johnson, Thomas J.

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