Poloidal rotation dynamics, radial electric field, and neoclassical theory in the jet internal-transport-barrier region

K. Crombé, Y. Andrew, M. Brix, C. Giroud, S. Hacquin, N.C. Hawkes, A. Murari, M.F.F. Nave, J. Ongena, V. Parail, G. Van Oost, I. Voitsekhovitch, K.-D. Zastrow

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Abstract

Results from the first measurements of a core plasma poloidal rotation velocity (vÎ) across internal transport barriers (ITB) on JET are presented. The spatial and temporal evolution of the ITB can be followed along with the vÎ radial profiles, providing a very clear link between the location of the steepest region of the ion temperature gradient and localized spin-up of vÎ. The vÎmeasurements are an order of magnitude higher than the neoclassical predictions for thermal particles in the ITB region, contrary to the close agreement found between the determined and predicted particle and heat transport coefficients [K.-D. Zastrow, Plasma Phys. Controlled FusionPPCFET0741-3335 46, B255 (2004)10.1088/0741-3335/46/12B/022]. These results have significant implications for the understanding of transport barrier dynamics due to their large impact on the measured radial electric field profile. © 2005 The American Physical Society.
Original languageEnglish
Article number155003
Pages (from-to)-
JournalPhysical Review Letters
Volume95
Issue number15
DOIs
Publication statusPublished - 7 Oct 2005
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Crombé, K., Andrew, Y., Brix, M., Giroud, C., Hacquin, S., Hawkes, N. C., Murari, A., Nave, M. F. F., Ongena, J., Parail, V., Van Oost, G., Voitsekhovitch, I., & Zastrow, K-D. (2005). Poloidal rotation dynamics, radial electric field, and neoclassical theory in the jet internal-transport-barrier region. Physical Review Letters, 95(15), -. [155003]. https://doi.org/10.1103/PhysRevLett.95.155003