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Destabilization of fast-ion-induced long sawteeth by localized current drive in the JET tokamak.
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2004 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 92, no 23Article in journal (Refereed) Published
Abstract [en]

In a tokamak fusion reactor the energetic alpha particles will transiently stabilize the magnetohydrodynamic activity causing sawtooth oscillations. The crash events terminating long sawtooth free periods can provide seed islands for neoclassical tearing modes [Phys. Rev. Lett. 88, 105001 (2002)]]. To shorten the sawtooth periods localized current drive near the q=1 surface is a possibility. This Letter provides the first experimental evidence for the effectiveness of this method in the different physics regime associated with fast-ion-induced long sawteeth on the JET tokamak.

Place, publisher, year, edition, pages
2004. Vol. 92, no 23
National Category
Other Engineering and Technologies
Identifiers
URN: urn:nbn:se:kth:diva-13593DOI: 10.1103/PhysRevLett.92.235004ISI: 000221961900023PubMedID: 15245165Scopus ID: 2-s2.0-3242727020OAI: oai:DiVA.org:kth-13593DiVA: diva2:326147
Note

QC 20100622

Available from: 2010-06-22 Created: 2010-06-22 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Fast wave heating of cyclotron resonant ions in tokamaks
Open this publication in new window or tab >>Fast wave heating of cyclotron resonant ions in tokamaks
2004 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2004. xiv, 61 p.
Keyword
Fusion plasma, tokamak, RF heating, fast wave heating, fast wave current drive, ion cyclotron resonance, ICRH, ICRF, ICCD, RF induced rotation, RF induced transport, RF induced pinch, RF pinch, finite orbit width, fast wave current drive, self-consi
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:kth:diva-3771 (URN)91-7283-780-2 (ISBN)
Public defence
2004-06-01, 00:00
Note
QC 20100622Available from: 2004-06-01 Created: 2004-06-01 Last updated: 2010-11-15Bibliographically approved

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Johnson, Thomas

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