Enhancement of the gyro lines by suprathermal particles
Abstract
The gyro lines are a pair of resonance lines in the power spectrum of incoherent scattering. They correspond to the electrostatic wavemode Omega_{r} = + or  Omega_{e}cos(theta) of a magnetized plasma where theta is the angle between the magnetic field and the scattering wave vector, and Omega_{e} is the electron gyro frequency. The effects of suprathermal particles (precipitating electrons and protons, photoelectrons and secondary electrons) on the gyro lines are investigated. It is shown that the gyro lines can be enhanced if the velocity component of the suprathermal particles in the direction of the wave matches the phase velocity of the wave. The suprathermal particles are represented both by a shifted biMaxwellian, and by a power law velocity distribution.
 Publication:

Oulu Univ., Fifth EISCAT Scientific Workshop
 Pub Date:
 1991
 Bibcode:
 1991oulu.workQ....M
 Keywords:

 Electron Precipitation;
 Incoherent Scattering;
 Line Spectra;
 Plasma Resonance;
 Proton Precipitation;
 Resonance Lines;
 Secondary Cosmic Rays;
 Charged Particles;
 Electrostatic Waves;
 Gyrofrequency;
 Phase Velocity;
 PhotonElectron Interaction;
 Velocity Distribution;
 Astrophysics