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  Micro-stability and transport modeling of internal transport barriers on JET

Garbet, X., Baranov, Y., Bateman, G., Benkadda, S., Beyer, P., Budny, R., et al. (2003). Micro-stability and transport modeling of internal transport barriers on JET. In Fusion Energy 2002. Vienna: International Atomic Energy Agency.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3BF7-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3BFD-0
Genre: Conference Paper

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 Creators:
Garbet, X.1, Author
Baranov, Y.1, Author
Bateman, G.1, Author
Benkadda, S.1, Author
Beyer, P.1, Author
Budny, R.1, Author
Crisanti, F.1, Author
Esposito, B.1, Author
Figarella, C.1, Author
Fourment, C.1, Author
Ghendrih, P.1, Author
Imbeaux, F.2, Author
Joffrin, E.1, Author
Kinsey, J.1, Author
Kritz, A.1, Author
Litaudon, X.1, Author
Maget, P.1, Author
Mantica, P.1, Author
Moreau, D.1, Author
Sarazin, Y.1, Author
Pankin, A.1, AuthorParail, V.3, Author              Peeters, A.3, Author              Tala, T.1, AuthorTardini, G.4, Author              Thyagaraja, A.1, AuthorVoitsekhovitch, I.1, AuthorWeiland, J.1, AuthorWolf, R.5, Author               more..
Affiliations:
1Association Euratom-CEA, Cadarache, France; EURATOM/UKAEA, Culham Science Centre, Abingdon, United Kingdom; Lehigh University Physics Department, Bethlehem, PA, USA; LPIIM, Centre Universitaire de Saint-Jerôme,Marseille, France; PPPL, Princeton University, Princeton, NJ, USA; Assoziatione EURATOM-ENEA sulla Fusione, Frascati, Italy; Istituto di Fisica del Plasma CNR-EURATOM, Milano, Italy; Chalmers University of Technology and Euratom-VR Assocation, Göteborg, Sweden; Association EURATOM-TEKES, VTT CTIP, Finland; Institut für Plasmaphysik, Association EURATOM, FZJ, Jülich, Germany, ou_persistent22              
2Max Planck Society, ou_persistent13              
3Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society
4Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              
5Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856291              

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 Abstract: Internal Transport Barriers (ITB's) in tokamak plasmas are a promising way to achieve steady-state plasmas with good confinement properties in a fusion reactor. Despite a large activity in this field, the formation and self-sustainment of barriers are still not well understood. The physics of ITB's in JET has been investigated with various techniques, namely micro-stability analysis, profile modelling and turbulence simulations. The calculation of linear growth rates show that the magnetic shear plays an important role in the formation of the ITB. The Shafranov shift, ratio of the ion to electron temperature, and impurity content further improve the stability. However the ExB velocity shear is important for the sustainment and the motion of the barrier. This picture is consistent with profile modelling and global fluid simulations of electrostatic drift waves. Turbulence simulations also show that the formation mechanisms are different for electron and ion barriers. Ion barriers are mainly due to the formation of a gap in the density of low wavenumber resonant surfaces whereas electron barriers are rather due to a reversal of the precession drift of trapped electrons.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Internal
 Degree: -

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Title: 19th Fusion Energy Conference
Place of Event: Lyon (FR)
Start-/End Date: 2002-10-14 - 2002-10-19

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Title: Fusion Energy 2002
Source Genre: Proceedings
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Publ. Info: Vienna : International Atomic Energy Agency
Pages: CD-ROM Volume / Issue: - Sequence Number: TH/2-1 Start / End Page: - Identifier: -