4 papers
Theory of zonal flow growth and propagation in toroidal geometry
Richard Nies, Felix Parra
The toroidal geometry of tokamaks and stellarators is known to play a crucial role in the linear physics of zonal flows, leading to e.g. the Rosenbluth-Hinton residual and geodesic…
Saturation of magnetised plasma turbulence by propagating zonal flows
Richard Nies, Felix Parra, Michael Barnes +2
Strongly driven ion-scale turbulence in tokamak plasmas is shown to be regulated by a new propagating zonal flow mode, the toroidal secondary mode, which is nonlinearly supported b…
Asymptotic scaling theory of electrostatic turbulent transport in magnetised fusion plasmas
T. Adkins, I. G. Abel, M. Barnes +8
Turbulent transport remains one of the principal obstacles to achieving efficient magnetic confinement in fusion devices. Two of the dominant drivers of the turbulence are microsca…
Designing a Validation Experiment for Radio Frequency Condensation
Lanke Fu, E. Litvinova Mitra, R. Nies +18
Theoretical studies have suggested that nonlinear effects can lead to "radio frequency condensation", which coalesces RF power deposition and driven current near the center of a ma…