Gauge-free electromagnetic gyrokinetic theory

Electromagnetic gyrokinetic simulations

A new electromagnetic kinetic electron d f particle simulation model has been demonstrated to work well at large values of plasma b times the ion-to-electron mass ratio @Y. Chen and S. E. Parker, J. Comput. Phys. 198, 463 ~2003!#. The simulation is three-dimensional using toroidal flux-tube geometry and includes electron-ion collisions. The model shows accurate shear Alfvén wave damping and mic...

Gyrokinetic Particle Simulation of Compressional Electromagnetic Modes

A gyrokinetic particle simulation model is developed for simulations of the compressional electromagnetic turbulence driven by the mirror instability. Results of the linear simulations of mirror modes agree well with the analytic dispersion relation. Nonlinear simulations of a single mode find that the mirror instability saturates via a phase-space trapping due to the nonlinear wave-particle in...

Nonlinear electromagnetic gyrokinetic simulations of tokamak plasmas

One of the central physics issues currently targeted by nonlinear gyrokinetic simulations is the role of finite-β effects. The latter change the MHD equilibrium, introduce new dynamical space and time scales, alter and enlarge the zoo of electrostatic microinstabilities and saturation mechanisms, and lead to turbulent transport along fluctuating magnetic field lines. It is shown that the electr...

A general theory for gauge-free lifting

A theory for lifting equations of motion for charged particle dynamics, subject to given electromagnetic like forces, up to a gauge-free system of coupled Hamiltonian Vlasov-Maxwell like equations is given. The theory provides very general expressions for the polarization and magnetization vector fields in terms of the particle dynamics description of matter. Thus, as is common in plasma physic...

Fully electromagnetic nonlinear gyrokinetic equations for tokamak edge turbulence