General frequency gyrokinetics
Abstract
A gyrokinetic formalism is developed which enables a treatment of linear waves of arbitrary wave frequency (NU) in the eikonal approximation for general magnetic field geometries. The treatment is an extension of previous gyrokinetic techniques which were restricted to the low frequency ((NU) (LAMBDA)) regime. In addition to the expected magnetic drift terms in the waveparticle resonances, additional corrections related to the distinction between particle and guiding center location, and to oscillatory terms in the particle orbits can be important for general frequencies and wave numbers. Specific applications of the formalism in an inhomogeneous magnetic field are presented for both the ion driftcyclotron instability at finite beta, and the gyroresonant damping of ion Bernstein modes in Maxwellian plasmas.
 Publication:

Unknown
 Pub Date:
 December 1981
 Bibcode:
 1981gfg..rept.....L
 Keywords:

 Bernstein Energy Principle;
 Cyclotron Frequency;
 Magnetohydrodynamic Stability;
 Damping;
 Drift Rate;
 Eikonal Equation;
 Kinetic Equations;
 Plasma Waves;
 Resonant Vibration;
 Plasma Physics