Conversion of poloidal flows into toroidal flows by phase space structures in trapped ion resonance driven turbulence

Conversion of poloidal flows into toroidal flows by phase space structures in trapped ion resonance driven turbulence

A theory to describe the conversion of poloidal momentum into toroidal momentum by phase space structures in trapped ion resonance driven turbulence is presented. In trapped ion resonance driven turbulence, phase space structures are expected to form and can contribute to transport by exerting dynamical friction. Toroidal momentum flux by dynamical friction is calculated. It is shown that dynam...

Ion temperature gradient driven turbulence with strong trapped ion resonance

On steady poloidal and toroidal flows in tokamak plasmas

The effects of poloidal and toroidal flows on tokamak plasma equilibria are examined in the magnetohydrodynamic limit. “Transonic” poloidal flows of the order of the sound speed multiplied by the ratio of poloidal magnetic field to total field B /B can cause the normally elliptic Grad– Shafranov GS equation to become hyperbolic in part of the solution domain. It is pointed out that the range of...

The effect of diamagnetic flows on turbulent driven ion toroidal rotationa)

Magnetically driven flows in arched plasma structures.

Laboratory experiments demonstrate high-speed plasma flows from both footpoints of arched magnetic flux tubes, resulting in bulk plasma transport into the flux tube and persistent axial collimation even as the flux tube lengthens and kinks. The measured flows are in agreement with the predictions of hoop force and collimation models involving fundamental MHD forces. These forces are expected to...