Transport-driven toroidal rotation in the tokamak edge

Abstract

The interaction of passing-ion drift orbits with spatially-inhomogeneous but purely diffusive radial transport is demonstrated to cause spontaneous toroidal spin-up to experimentally-relevant values in the tokamak edge. Physically, major-radial orbit shifts cause orbit-averaged diffusivities to depend on parallel velocity, including its sign, leading to residual stress. The resulting intrinsic rotation scales with ion temperature over poloidal magnetic field strength, resembling typical experimental scalings. Additionally, an inboard (outboard) X-point is expected to enhance co- (counter-) current rotation.

References in corpus (1)

• Up-down symmetry of the turbulent transport of toroidal angular momentum in tokamaks

Cited by in corpus (14)

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• Effects of collisional ion orbit loss on tokamak radial electric field and toroidal rotation in an L-mode plasma
• Parasitic Momentum Flux in the Tokamak Core
• Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation
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• Intrinsic toroidal rotation driven by turbulent and neoclassical processes in tokamak plasmas from global gyrokinetic simulations
• Neoclassical flows in deuterium-helium plasma density pedestals
• Extending the Single-Fluid Solvability Conditions for More General Plasma Systems
• Spontaneous spin-up induced by turbulence-driven topological transition of orbits in a tokamak plasma