66 citations · 424 across the 18 of their papers we have counts for
13 papers · 1 filter
First-principles based plasma profile predictions for optimized stellarators
A. Bañón Navarro, A. Di Siena, J. L. Velasco +6
In the present Letter, first-of-its-kind computer simulations predicting plasma profiles for modern optimized stellarators -- while self-consistently retaining neoclassical transpo…
Global gyrokinetic simulations of ASDEX Upgrade up to the transport time-scale with GENE-Tango
A. Di Siena, A. Banon Navarro, T. Luda +12
An accurate description of turbulence up to the transport time scale is essential for predicting core plasma profiles and enabling reliable calculations for designing advanced scen…
Topological phase in plasma physics
Jeffrey B. Parker
Recent discoveries have demonstrated that matter can be distinguished on the basis of topological considerations, giving rise to the concept of topological phase. Introduced origin…
Topological Gaseous Plasmon Polariton in Realistic Plasma
Jeffrey B. Parker, J. B. Marston, Steven M. Tobias +1
Nontrivial topology in bulk matter has been linked with the existence of topologically protected interfacial states. We show that a gaseous plasmon polariton (GPP), an electromagne…
Nontrivial topology in the continuous spectrum of a magnetized plasma
Jeffrey B. Parker, J. W. Burby, J. B. Marston +1
Classification of matter through topological phases and topological edge states between distinct materials has been a subject of great interest recently. While lattices have been t…
Magnetic eddy viscosity of mean shear flows in two-dimensional magnetohydrodynamics
Jeffrey B. Parker, Navid C. Constantinou
Magnetic induction in magnetohydrodynamic fluids at magnetic Reynolds number (Rm) less than~1 has long been known to cause magnetic drag. Here, we show that when $\mathrm{Rm} \gg 1…
Investigation of a Multiple-Timescale Turbulence-Transport Coupling Method in the Presence of Random Fluctuations
Jeffrey B. Parker, Lynda L. LoDestro, Alejandro Campos
One route to improved predictive modeling of magnetically confined fusion reactors is to couple transport solvers with direct numerical simulations (DNS) of turbulence, rather than…
Bringing global gyrokinetic turbulence simulations to the transport timescale using a multiscale approach
Jeffrey B. Parker, Lynda L. LoDestro, Daniel Told +5
The vast separation dividing the characteristic times of energy confinement and turbulence in the core of toroidal plasmas makes first-principles prediction on long timescales extr…
Numerical simulation of the geometrical-optics reduction of CE2 and comparisons to quasilinear dynamics
Jeffrey B. Parker
Zonal flows have been observed to appear spontaneously from turbulence in a number of physical settings. A complete theory for their behavior is still lacking. Recently, a number o…
Zonal-flow dynamics from a phase-space perspective
D. E. Ruiz, J. B. Parker, E. L. Shi +1
The wave kinetic equation (WKE) describing drift-wave (DW) turbulence is widely used in studies of zonal flows (ZFs) emerging from DW turbulence. However, this formulation neglects…
Dynamics of Zonal Flows: Failure of Wave-Kinetic Theory, and New Geometrical Optics Approximations
Jeffrey B. Parker
The self-organization of turbulence into regular zonal flows can be fruitfully investigated with quasilinear methods and statistical descriptions. A wave kinetic equation that assu…
Zonal Flow as Pattern Formation
Jeffrey B. Parker, John A. Krommes
In this section, we examine the transition from statistically homogeneous turbulence to inhomogeneous turbulence with zonal flows. Statistical equations of motion can be derived fr…
Zonal Flows and Turbulence in Fluids and Plasmas
Jeffrey B. Parker
In geophysical and plasma contexts, zonal flows are well known to arise out of turbulence. We elucidate the transition from statistically homogeneous turbulence without zonal flows…