Gyrokinetic equivalence

Gyrokinetic Equivalence

We compare two different derivations of the gyrokinetic equation: the Hamiltonian approach in [Dubin D H E et al 1983 Phys. Fluids 26 3524] and the recursive methodology in [Parra F I et al 2008 Plasma Phys. Control. Fusion 50 065014]. We prove that both approaches yield the same result at least to second order in a Larmor radius over macroscopic length expansion. There are subtle differences i...

Two dimensional gyrokinetic turbulence

G. G. PLUNK1,2,6 †, S. C. COWLEY3,4, A. A. SCHEKOCHIHIN5 AND T. TATSUNO6 Department of Physics, University of California, Los Angeles, CA 90095, USA Wolfgang Pauli Institute, University of Vienna, A-1090 Vienna, Austria EURATOM/UKAEA Fusion Association, Culham Science Centre, Abington OX 143DB, UK Plasma Physics, Blackett Laboratory, Imperial College, London SW7 2AZ, UK Rudolf Peierls Centre fo...

Gyrokinetic microtearing turbulence.

The nonlinear dynamics of microtearing modes in standard tokamak plasmas are investigated by means of ab initio gyrokinetic simulations. The saturation levels of the magnetic field fluctuations can be understood in the framework of a balance between (small poloidal wave number) linear drive and small-scale dissipation. The resulting heat transport is dominated by the electron magnetic component...

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 Fokker-Planck Collision Operator