Dynamics of shear Alfvén waves and energetic particles are crucial to the performance of
burning fusion plasmas. This article reviews linear as well as nonlinear physics of shear …

This is the report of a study group that was asked to review recent work on the issue of
turbulent momentum transport in gyrokinetic theory, forms of gyrokinetics that lead to a …

We introduce a gyro-gauge independent formulation of a simplified guiding-center
reduction, which removes the fast time-scale from particle dynamics by Lie-transforming the …

Equivalent guiding-center Hamiltonian theories are constructed based on higher-order Lie-
transform perturbation methods. Higher-order guiding-center theories are distinguished on …

Recently, the validity of the guiding-center approach to model relativistic runaway electrons
in tokamaks has been challenged by full-orbit simulations that demonstrate the breakdown …

While the friction force in a plasma decreases with increasing test particle velocity, a particle
can continue accelerating without limit once its velocity has exceeded the point where the …

Gyrokinetics is a key model for plasma micro-turbulence, commonly used for fusion plasmas
or small-scale astrophysical turbulence, for instance. The model still suffers from several …

This is the report of a study group that was asked to review recent work on the issue of
turbulent momentum transport in gyrokinetic theory, forms of gyrokinetics that lead to a …

La gyrocinétique est un modèle clef pour la microturbulence en physique des plasmas,
couramment utilisé pour les plasmas de fusion ou pour la turbulence plasma de petite …

Gyrokinetics is a key model for plasma micro-turbulence, commonly used for fusion plasmas
or small-scale astrophysical turbulence, for instance. The model still suffers from several …