40 citations · 91 across the 15 of their papers we have counts for
6 papers · 1 filter
Destabilization of temperature-gradient-driven plasma turbulence by equilibrium flow shear
Haomin Sun, Plamen G. Ivanov, Justin Ball +2
A novel physical mechanism whereby sheared equilibrium flow enables temperature-gradient-driven turbulence is identified. Gyrokinetic simulations of ion-scale plasma turbulence sho…
On the transition to large fluxes and access to second stability in gyrokinetic simulations of electromagnetic turbulence in STEP
Daniel Kennedy, Yujia Zhang, Toby Adkins +6
This work investigates the nonlinear transition to large heat fluxes observed in local gyrokinetic simulations of electromagnetic turbulence in STEP. Using the stress-balance frame…
Zonal-flow generation and saturation of electromagnetic ion-scale turbulence in tokamaks
Y. Zhang, T. Adkins, M. Barnes +5
Local flux-tube gyrokinetic simulations of ion-scale turbulence in tokamak plasmas at finite plasma beta are conducted to investigate the generation of zonal flows via turbulent st…
High-beta runaway transitions in a fluid model of electromagnetic ion-temperature-gradient turbulence
Y. Zhang, M. Barnes, A. A. Schekochihin +2
Gyrokinetic simulations of tokamak turbulence indicate that fluctuation levels increase abruptly and dramatically when the plasma beta exceeds a certain critical value. This increa…
Scaling laws for the cutoff wavenumber of the short-wavelength ion-temperature-gradient mode in a Z-pinch
O. Gupta, M. Barnes, F. I. Parra +4
We use a heuristic fluid model to predict the dependence of the cutoff wave number for the short-wavelength ion temperature gradient (SWITG) mode on ion density gradient, ion tempe…
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…