20 citations · 33 across the 5 of their papers we have counts for
6 papers · 1 filter
Reduction of electrostatic turbulence in a quasi-helically symmetric stellarator via critical gradient optimization
G. T. Roberg-Clark, P. Xanthopoulos, G. G. Plunk
We present a stellarator configuration optimized for a large threshold (``critical gradient'') for the onset of the ion temperature gradient (ITG) driven mode, which achieves the l…
Exploring zonal flow mediated saturation on stellarators
C. D. Mora Moreno, J. H. E. Proll, G. G. Plunk +1
In stellarators, zonal flow activity depends sensitively on geometry of the three dimensional magnetic field, via an interplay of mechanisms that is not fully understood. In this w…
Suppression of turbulence by trapped electrons in optimised stellarators
J. H. E. Proll, P. Xanthopoulos, P. Helander +5
In fusion devices, the geometry of the confining magnetic field has a significant impact on the instabilities that drive turbulent heat loss. This is especially true of stellarator…
The Parallel Boundary Condition for Turbulence Simulations in Low Magnetic Shear Devices
Mike F. Martin, Matt Landreman, Pavlos Xanthopoulos +2
Flux tube simulations of plasma turbulence in stellarators and tokamaks typically employ coordinates which are aligned with the magnetic field lines. Anisotropic turbulent fluctuat…
Ion temperature gradient turbulence in helical and axisymmetric RFP plasmas
I. Predebon, P. Xanthopoulos
Turbulence induced by the ion temperature gradient (ITG) is investigated in the helical and axisymmetric plasma states of a reversed field pinch device by means of gyrokinetic calc…
Gyrokinetic studies of the effect of beta on drift-wave stability in NCSX
J. A. Baumgaertel, G. W. Hammett, D. R. Mikkelsen +2
The gyrokinetic turbulence code GS2 was used to investigate the effects of plasma beta on linear, collisionless ion temperature gradient (ITG) modes and trapped electron modes (TEM…