Impact of poloidal convective cells on momentum flux in tokamaks


Radial fluxes of parallel momentum due to ##IMG## [] $Etimes B$ and magnetic drifts are shown to be correlated in tokamak plasmas. This correlation comes from the onset of poloidal convective cells generated by turbulence. The entire process requires a symmetry breaking mechanism, e.g. a mean shear flow. An analytical calculation shows that anti-correlation between the poloidal and parallel components of the turbulent Reynolds stress results in anti-correlation of the fluxes of parallel momentum generated by ##IMG## [] $Etimes B$ and curvature drifts.

New Journal of Physics