onr:"swepub:oai:DiVA.org:kth-22105"
Search: onr:"swepub:oai:DiVA.org:kth-22105" > Control of sawteeth...
- 1 of 1
- Previous record
- Next record
- To hitlist
Control of sawteeth and triggering of NTMs with ion cyclotron resonance frequency waves in JET
- Westerhof, E. (author)
- Sauter, O. (author)
- Mayoral, M. L. (author)
- show more...
- Howell, D. F. (author)
- Mantsinen, M. J. (author)
- Nave, M. F. F. (author)
- Alper, B. (author)
- Angioni, C. (author)
- Belo, P. (author)
- Buttery, R. J. (author)
- Gondhalekar, A. (author)
- Hender, T. C. (author)
- Lamalle, P. (author)
- Maraschek, M. E. (author)
- McClements, K. G. (author)
- Nguyen, F. (author)
- Pecquet, A. L. (author)
- Podda, S. (author)
- Rapp, J. (author)
- Sharapov, S. E. (author)
- Zabiego, M. (author)
- show less...
- (creator_code:org_t)
- 2002-10-09
- 2002
- English.
- In: Nuclear Fusion. - : IOP Publishing. - 0029-5515 .- 1741-4326. ; 42:11, s. 1324-1334
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- A new scenario to delay or prevent neoclassical tearing mode (NTM) onset is presented. By active sawtooth destabilization, short period and low amplitude sawteeth are generated, such that the sawtooth produced NTM seed island is reduced and the threshold normalized plasma pressure for triggering of NTMs, beta(Nonset), is increased. The scenario has been explored experimentally in the Joint European Torus (JET). Ion cyclotron resonance frequency (ICRF) waves tuned to the 2nd harmonic H-minority resonance have been used for sawtooth control. Whereas ICRF waves generally induce sawtooth stabilization, favouring the triggering of NTMs and reducing beta(Nonset), the present experiments show that by toroidally directed waves, ion cyclotron current drive is produced, and that sawteeth can be destabilized by careful positioning of the 2nd harmonic H resonance layer with respect to the sawtooth inversion radius. As a result, NTM onset is delayed and beta(Nonset) is increased above its value obtained in discharges with additional heating from neutral beam injection alone.
Keyword
- neoclassical tearing modes
- current drive
- beta-limit
- magnetic islands
- asdex upgrade
- stabilization
- tokamak
- perturbations
- onset
- discharges
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Nuclear Fusion (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Westerhof, E.
- Sauter, O.
- Mayoral, M. L.
- Howell, D. F.
- Mantsinen, M. J.
- Nave, M. F. F.
- show more...
- Alper, B.
- Angioni, C.
- Belo, P.
- Buttery, R. J.
- Gondhalekar, A.
- Hellsten, Torbjö ...
- Hender, T. C.
- Johnson, Thomas ...
- Lamalle, P.
- Maraschek, M. E.
- McClements, K. G ...
- Nguyen, F.
- Pecquet, A. L.
- Podda, S.
- Rapp, J.
- Sharapov, S. E.
- Zabiego, M.
- show less...
- Articles in the publication
- Nuclear Fusion
- By the university
- Royal Institute of Technology
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
