128 citations · 202 across the 23 of their papers we have counts for
6 papers · 1 filter
Bifurcation in electrostatic resistive drift wave turbulence
Ryusuke Numata, Rowena Ball, Robert L. Dewar
The Hasegawa-Wakatani equations, coupling plasma density and electrostatic potential through an approximation to the physics of parallel electron motions, are a simple model that d…
Nonlinear Simulation of Drift Wave Turbulence
R. Numata, R. Ball, R. L. Dewar
In a two-dimensional version of the modified Hasegawa-Wakatani (HW) model, which describes electrostatic resistive drift wave turbulence, the resistive coupling between vorticity a…
The case of the trapped singularities
R. Ball
A case study in bifurcation and stability analysis is presented, in which reduced dynamical system modelling yields substantial new global and predictive information about the beha…
Metamorphosis of plasma turbulence-shear flow dynamics through a transcritical bifurcation
R. Ball, R. L. Dewar, H. Sugama
The structural properties of an economical model for a confined plasma turbulence governor are investigated through bifurcation and stability analyses. A close relationship is demo…
Strong "quantum" chaos in the global ballooning mode spectrum of three-dimensional plasmas
R. L. Dewar, C. Cuthbert, R. Ball
The spectrum of ideal magnetohydrodynamic (MHD) pressure-driven (ballooning) modes in strongly nonaxisymmetric toroidal systems is difficult to analyze numerically owing to the sin…
A walk in the parameter space of L-H transitions without stepping on or through the cracks
Rowena Ball, Robert L. Dewar
A mathematically and physically sound three-degree-of-freedom dynamical model that emulates low- to high-confinement mode (L--H) transitions is elicited from a singularity theory c…