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  Internal transport barrier triggering by rational magnetic flux surfaces in tokamaks

Joffrin, E., Challis, C. D., Conway, G. D., Garbet, X., Gude, A., Günter, S., et al. (2003). Internal transport barrier triggering by rational magnetic flux surfaces in tokamaks. Nuclear Fusion, 43(10), 1167-1174. doi:10.1088/0029-5515/43/10/018.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-3A9B-5 Versions-Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-3A9C-3
Genre: Zeitschriftenartikel

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 Urheber:
Joffrin, E.1, Autor
Challis, C. D.1, Autor
Conway, G. D.2, Autor           
Garbet, X.1, Autor
Gude, A.3, Autor           
Günter, S.3, Autor           
Hawkes, N. C.1, Autor
Hender, T. C.1, Autor
Howell, D. F.1, Autor
Huysmans, G. T. A.1, Autor
Lazzaro, E.1, Autor
Maget, P.1, Autor
Maraschek, M.4, Autor           
Peeters, A. G.5, Autor           
Pinches, S. D.5, Autor           
Sharapov, S. E.1, Autor
JET EFDA Contributors1, Autor
Affiliations:
1Association Euratom-CEA, Cadarache, F-13108, France; Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxfordshire, OX14 3DB, UK; Istituto di Fisica del Plasma del CNR, Assoc. Euratom-ENEA-CNR per la Fusione, 20125 Milan, Italy, ou_persistent22              
2Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              
3Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856309              
4Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856292              
5Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society

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 Zusammenfassung: The formation of internal transport barriers (ITBs) has been experimentally associated with the presence of rational q surfaces in both JET and ASDEX Upgrade. The triggering mechanisms are related to the occurrence of magneto-hydrodynamic (MHD) instabilities such as mode coupling and fishbone activity. These events could locally modify the poloidal velocity and increase transiently the shearing rate to values comparable with the linear growth rate of ion temperature gradient modes. For JET reversed magnetic shear scenarios, ITB emergence occurs preferentially when the minimum q reaches an integral value. In this case, transport effects localized in the vicinity of zero magnetic shear and close to rational q values may be at the origin of ITB formation. The role of rational q surfaces in ITB triggering stresses the importance of q profile control for an advanced tokamak scenario and could assist in substantially lowering the access power to these scenarios in next step facilities.

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Sprache(n): eng - English
 Datum: 2003
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 59822
DOI: 10.1088/0029-5515/43/10/018
URI: http://stacks.iop.org/0029-5515/43/1167
 Art des Abschluß: -

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Titel: Nuclear Fusion
  Alternativer Titel : Nucl. Fusion
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Copyright © Institute of Physics and IOP Publishing Limited 2003
Seiten: - Band / Heft: 43 (10) Artikelnummer: - Start- / Endseite: 1167 - 1174 Identifikator: -