| Autor: |
E. Trier, P. Hennequin, Ö.D. Gürcan, R. Sabot, J. Bucalossi, Z.O. Guimarães-Filho, C. Bourdelle, F. Clairet, G. Falchetto, C. Fenzi, X. Garbet, P. Maget, L. Vermare, Team, The Tore Supra |
| Předmět: |
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| Zdroj: |
Nuclear Fusion; Apr2017, Vol. 57 Issue 4, p1-1, 1p |
| Abstrakt: |
In Tore Supra plasmas, the perpendicular velocity measured by Doppler reflectometry was observed to reverse in a localized zone close to a normalized radius ∼0.5–0.6, changing from a negative value (corresponding to a negative radial electric field Er) to a positive value (). This occurs in L-mode, ohmic plasmas with a negligible external momentum input, a non-circular limited cross-section, and an edge safety factor close to 3. This reversal is favoured by a decrease in the magnetic field, or an increase in density. It is accompanied by a characteristic behaviour of the MHD activity signal, whose amplitude decrease during a ramp-down of the edge safety factor as it approaches –3.2. A m/n = 2/1 mode is involved in the mechanism causing these observations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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