Details

Autor(en) / Beteiligte

• Rice, J. E.
• Greenwald, M. J.
• Podpaly, Y. A.
• Reinke, M. L.
• Diamond, P. H.
• Hughes, J. W.
• Howard, N. T.
• Ma, Y.
• Cziegler, I.
• Duval, B. P.
• Ennever, P. C.
• Ernst, D.
• Fiore, C. L.
• Gao, C.
• Irby, J. H.
• Marmar, E. S.
• Porkolab, M.
• Tsujii, N.
• Wolfe, S. M.

Titel

Ohmic energy confinement saturation and core toroidal rotation reversal in Alcator C-Mod plasmas

Ist Teil von

• Physics of plasmas, 2012-05, Vol.19 (5), p.056106-056106-7

Ort / Verlag

United States: American Institute of Physics

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Ohmic energy confinement saturation is found to be closely related to core toroidal rotation reversals in Alcator C-Mod tokamak plasmas. Rotation reversals occur at a critical density, depending on the plasma current and toroidal magnetic field, which coincides with the density separating the linear Ohmic confinement regime from the saturated Ohmic confinement regime. The rotation is directed co-current at low density and abruptly changes direction to counter-current when the energy confinement saturates as the density is increased. Since there is a bifurcation in the direction of the rotation at this critical density, toroidal rotation reversal is a very sensitive indicator in the determination of the regime change. The reversal and confinement saturation results can be unified, since these processes occur in a particular range of the collisionality.