Spontaneous toroidal rotation, anomalous radial particle flux, and the electron-ion asymmetric anomalous viscous damping

TL;DR

This paper explains spontaneous toroidal rotation in tokamak plasmas through electron-ion asymmetric viscous damping and turbulent particle flux, aligning with experimental observations of momentum sources at the plasma edge.

Contribution

It introduces a novel explanation for spontaneous rotation involving asymmetric viscous damping and turbulent flux, advancing understanding of plasma edge dynamics.

Findings

Spontaneous toroidal rotation observed in tokamak edge plasmas.

Electron-ion asymmetric viscous damping contributes to momentum transfer.

Turbulent radial particle flux explains the observed momentum source.

Abstract

AA spontaneous toroidal rotation due to the electron-ion asymmetric anomalous viscous damping and the turbulent radial particle flux has been found, which explains the experimental observation of the anomalous toroidal momentum source in the edge of a tokamak plasma.