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Thermal dynamics in the flux‐coordinate independent turbulence code GRILLIX
Contributions to Plasma Physics, Volume 60, Issue 5-6, June-July 2020., 2020 Abstract GRILLIX employs the flux‐coordinate independent approach (FCI), which allows us to study boundary plasma turbulence in realistic diverted configurations. Recently, the physical model in GRILLIX has been extended to a global drift‐reduced Braginskii model, without any separation between background and fluctuations.
W. Zholobenko +10 more
wiley +1 more source
Transport in gyrokinetic tokamaks [PDF]
Physics of Plasmas, 1995 A comprehensive study of transport in full-volume gyrokinetic (gk) simulations of ion temperature gradient driven turbulence in core tokamak plasmas is presented. Though this ``gyrokinetic tokamak`` is much simpler than experimental tokamaks, such simplicity is an asset, because a dependable nonlinear transport theory for such systems should be more ...
Mynick, H. E., Parker, S. E.
openaire +3 more sources
Thermal disequilibration of ions and electrons by collisionless plasma turbulence [PDF]
, 2018 Does overall thermal equilibrium exist between ions and electrons in a weakly collisional, magnetised, turbulent plasma---and, if not, how is thermal energy partitioned between ions and electrons?
Barnes, Michael +2 more
core +3 more sources
Nonlinear gyrokinetic Coulomb collision operator [PDF]
Journal of Plasma Physics, 2019 A gyrokinetic Coulomb collision operator is derived, which is particularly useful to describe the plasma dynamics at the periphery region of magnetic confinement fusion devices. The derived operator is able to describe collisions occurring in distribution functions arbitrarily far from equilibrium with variations on spatial scales at and below the ...
Jorge, R., Frei, B. J., Ricci, P.
openaire +2 more sources
Self-generated vortex flows in a tokamak magnetic island with a background flow
Nuclear Fusion, 2023 We present a gyrokinetic theory of self-generated E × B vortex flows in a magnetic island in a collisionless tokamak plasma with a background vortex flow.
G.J. Choi
doaj +1 more source
Reduction and approximation in gyrokinetics
, 2007 The gyrokinetics formulation of plasmas in strong magnetic fields aims at the elimination of the angle associated with the Larmor rotation of charged particles around the magnetic field lines. In a perturbative treatment or as a time-averaging procedure,
Borel E +10 more
core +2 more sources
Electromagnetic gyrokinetic instabilities in STEP
Nuclear Fusion, 2023 We present herein the results of a linear gyrokinetic analysis of electromagnetic microinstabilites in the conceptual high $-\beta,$ reactor-scale, tight-aspect-ratio tokamak Spherical Tokamak for Energy Production, https://step.ukaea.uk .
D. Kennedy +6 more
doaj +1 more source
Linear signatures in nonlinear gyrokinetics: interpreting turbulence with pseudospectra
New Journal of Physics, 2016 A notable feature of plasma turbulence is its propensity to retain features of the underlying linear eigenmodes in a strongly turbulent state—a property that can be exploited to predict various aspects of the turbulence using only linear information.
D R Hatch +5 more
doaj +1 more source
Nuclear Fusion, 2023 Flux-tube (local) gyrokinetic codes are widely used to simulate drift-wave turbulence in magnetic confinement devices. While a large number of studies show that flux-tube codes provide an excellent approximation for turbulent transport in medium-large ...
A. Di Siena +10 more
doaj +1 more source
Validating modelling assumptions of alpha particles in electrostatic turbulence
, 2014 To rigorously model fast ions in fusion plasmas, a non-Maxwellian equilibrium distribution must be used. In the work, the response of high-energy alpha particles to electrostatic turbulence has been analyzed for several different tokamak parameters.
Abel, Ian +3 more
core +1 more source