62 citations · 232 across the 16 of their papers we have counts for
16 papers
ALLIANCE: Spectral solver for kinetic plasma turbulence
Evgeny A. Gorbunov, Bogdan Teaca
The ALLIANCE code is developed to solve a new set of four-dimensional electromagnetic drift-kinetic equations in slab geometry [J. Plasma Phys. 88 905880117 (2022)]. The nonlinear…
Solving Triad Reduced Interactions for Drift Kinetic Equations
Evgeny A. Gorbunov, Bogdan Teaca
We present the TRIDK code, which is written in Python, that solves Triad Reduced Interactions for a Drift Kinetic system of equations. The four-dimensional drift kinetic system of…
Four-dimensional equations for the study of electromagnetic plasma turbulence in a drift kinetic limit
Evgeny A. Gorbunov, Bogdan Teaca
For a magnetised plasma in a straight magnetic guide field, we derive a set of four-dimensional kinetic equations, which can capture electromagnetic turbulence in the drift kinetic…
Sub-grid-scale effects in magnetised plasma turbulence
Bogdan Teaca, Evgeny A. Gorbunov, Daniel Told +2
In the present paper, we use a coarse-graining approach to investigate the nonlinear redistribution of free energy in both position and scale space for weakly collisional magnetise…
Simple advecting structures and the edge of chaos in subcritical tokamak plasmas
Ben F. McMillan, Chris C. T. Pringle, Bogdan Teaca
In tokamak plasmas, sheared flows perpendicular to the driving temperature gradients can strongly stabilize linear modes. While the system is linearly stable, regimes with persiste…
A nonlinear approach to transition in subcritical plasmas with sheared flow
Chris C. T. Pringle, Ben F. McMillan, Bogdan Teaca
In many plasma systems, introducing a small background shear flow is enough to stabilize the system linearly. The nonlinear dynamics are much less sensitive to sheared flows than t…
Gyrokinetic turbulence: between idealized estimates and a detailed analysis of nonlinear energy transfers
Bogdan Teaca, Frank Jenko, Daniel Told
Using large resolution numerical simulations of GK turbulence, spanning an interval ranging from the end of the fluid scales to the electron gyroradius, we study the energy transfe…
The Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence
A. B. Navarro, B. Teaca, D. Told +3
We analyze plasma heating in weakly collisional kinetic Alfvén wave (KAW) turbulence using high resolution gyrokinetic simulations spanning the range of scales between the ion and…
Kinetic intermittency in magnetized plasma turbulence
Bogdan Teaca, Alejandro Bañón Navarro, Daniel Told +1
We employ magnetized plasma turbulence, described by a gyrokinetic formalism in an interval ranging from the end of the fluid scales to the electron gyroradius, to introduce the fi…
The anisotropic redistribution of free energy for gyrokinetic plasma turbulence in a Z-pinch
Alejandro Banon Navarro, Bogdan Teaca, Frank Jenko
For a Z-pinch geometry, we report on the nonlinear redistribution of free energy across scales perpendicular to the magnetic guide field, for a turbulent plasma described in the fr…
Cosmic-ray pitch-angle scattering in imbalanced MHD turbulence simulations
Martin S. Weidl, Frank Jenko, Bogdan Teaca +1
Pitch-angle scattering rates for cosmic-ray particles in magnetohydrodynamic (MHD) simulations with imbalanced turbulence are calculated for fully evolving electromagnetic turbulen…
The energetic coupling of scales in gyrokinetic plasma turbulence
Bogdan Teaca, Alejandro Bañón Navarro, Frank Jenko
In magnetized plasma turbulence, the couplings of perpendicular spatial scales that arise due to the nonlinear interactions are analyzed from the perspective of the free-energy exc…
Acceleration of Particles in Imbalanced Magnetohydrodynamic Turbulence
Bogdan Teaca, Martin S. Weidl, Frank Jenko +1
The present work investigates the acceleration of test particles in balanced and imbalanced Alfvénic turbulence, relevant to the solar-wind problem. These turbulent states, obtaine…
Locality properties of the free energy fluxes in gyrokinetic turbulence
Bogdan Teaca, Alejandro Banon Navarro, Frank Jenko +2
The nature of the nonlinear interactions in gyrokinetic (GK) turbulence, driven by an ion-temperature gradient instability, is investigated using numerical simulations of single io…
On the locality of MHD turbulence scale fluxes
B. Teaca, D. Carati, J. A. Domaradzki
The scale locality of energy fluxes for magnetohydrodynamics (MHD) is investigated numerically for stationary states of turbulence. Two types of forces are used to drive turbulence…
Controlling the level of the ideal invariant fluxes for MHD turbulence using TURBO spectral solver
B. Teaca, C. C. Lalescu, B. Knaepen +1
The ideal invariants present in the formalism of magnetohydrodynamics (MHD), i.e. global quantities that are conserved in the absence of sources and dissipative effects, play an im…