14 citations · 27 across the 6 of their papers we have counts for
6 papers
Intrinsic momentum transport driven by almost-rational surfaces in tokamak plasmas
Justin Ball, Arnas Volcokas, Stephan Brunner
We demonstrate that a symmetry of the local gyrokinetic model is broken when the safety factor q is almost (but not exactly) a rational number and magnetic shear is $\hat{s} \appro…
Turbulence-Generated Stepped Safety Factor Profiles in Tokamaks with Low Magnetic Shear
Arnas Volčokas, Justin Ball, Giovanni Di Giannatale +1
Nonlinear local and global gyrokinetic simulations of tokamak plasmas demonstrate that turbulence-generated currents flatten the safety factor profile near low-order rational surfa…
Turbulence-Induced Safety Factor Profile Flattening at Rational Surfaces in Tokamaks with Low Magnetic Shear
Arnas Volčokas, Justin Ball, Giovanni Di Giannatale +1
In this paper, we investigate the effects of ion-scale turbulence-generated currents on the local safety factor profile under conditions of low magnetic shear and proximity to rati…
A new quasilinear model for turbulent momentum transport in tokamaks with flow shear and plasma shaping
Haomin Sun, Justin Ball, Stephan Brunner +1
In tokamak experiments, sufficiently strong flow shear reduces turbulent transport, thereby improving the prospects for fusion power plants. It is therefore of great im…
Ultra Long Turbulent Eddies, Magnetic Topology, and the Triggering of Internal Transport Barriers in Tokamaks
A. Volčokas, J. Ball, S. Brunner
Local nonlinear gyrokinetic simulations of tokamak plasmas demonstrate that turbulent eddies can extend along magnetic field lines for hundreds of poloidal turns when the magnetic…
Unveiling the role of dielectric trap states on capacitively coupled radio-frequency plasma discharge: dynamic charging behaviors
Shu Zhang, Guang-Yu Sun, Volčokas Arnas +2
The influence of charge trap states in the dielectric boundary material on capacitively coupled radio frequency plasma discharge is investigated with theory and Particle in cell/Mo…