Articles | Volume 9, issue 2
Nonlin. Processes Geophys., 9, 69–74, 2002
https://doi.org/10.5194/npg-9-69-2002

Special issue: Theory and simulation of Solar System Plasmas, No. 3

Nonlin. Processes Geophys., 9, 69–74, 2002
https://doi.org/10.5194/npg-9-69-2002

  30 Apr 2002

30 Apr 2002

On resonant interactions of ions with plasma waves in a reduced quasi-linear theory

E. Marsch E. Marsch
  • Max-Planck-Institut für Aeronomie, Max-Planck-Str. 2, D-37191 Katlenburg-Lindau, Germany

Abstract. Based on quasi-linear theory (involving pitch angle scattering), the resonant interactions between ions and waves in an anisotropic multi-component plasma are discussed. In particular, electromagnetic Alfvén and ion-cyclotron waves propagating along or obliquely to the magnetic field are considered. A set of reduced (with respect to the perpendicular velocity component) quasi-linear diffusion equations is derived, involving reduced 1-D velocity distribution functions (VDFs), as they occur in wave dispersion relations. A 2-D model VDF can be constructed when using the Gaussian approximation. Wave-particle heating and acceleration rates are calculated.