Plasma rotation from momentum transport by neutrals in tokamaks

Abstract

Neutral atoms can strongly influence the intrinsic rotation and radial electric field at the tokamak edge. Here, we present a framework to investigate these effects when the neutrals dominate the momentum transport. We explore the parameter space numerically, using highly flexible model geometries and a state of the art kinetic solver. We find that the most important parameters controlling the toroidal rotation and electric field are the major radius where the neutrals are localized and the plasma collisionality. This offers a means to influence the rotation and electric field by, for example, varying the radial position of the X-point to change the major radius of the neutral peak.

References in corpus (1)

• Global effects on neoclassical transport in the pedestal with impurities

Cited by in corpus (6)

• Multi-particle collision simulations of 2D one-component plasmas: anomalous transport and dimensional crossovers
• Edge Momentum Transport by Neutrals: an Interpretive Numerical Framework
• Edge rotation from momentum transport by neutrals
• Neoclassical flows in deuterium-helium plasma density pedestals
• Effect of the Shafranov shift and the gradient of $\beta$ on intrinsic momentum transport in up-down asymmetric tokamaks
• Isotope and density profile effects on pedestal neoclassical transport