Acceleration of energetic particles by whistler waves in active space experiment with charged particle beams injection
Abstract
Results of energetic particle spectra perturbations registered on subsatellite Magion-3 during simultaneous injection of electron and xenon ion beams from the Intercosmos-25 (IK-25) satel-lite are discussed. One of the specific feature of this experiment (orbit 201,202) was that the charged particle flows were injected in the same direction along the magnetic field lines thereby produced the oblique beam-into-beam injection. Appearance of energetic electron and ion flux disturbances may be caused by the interaction of charged particles with whistler or alfven waves excited during beams injection. Electromagnetic waves excitation in these frequency ranges depends on a large variety of beam and plasma parameters for such configuration of injections. First of all, for the whistler waves amplification the relative weak magnetic field and a sufficiently small thermal longitudinal divergence of beam electrons are needed. Beam-plasma instability development does not contribute to the excitation of electromagnetic waves due to the smoothing of the beam particle distribution. The growth rates of the whistler and potential plasma waves are calculated for different electron beam models during modulated/unmodulated regimes of injection. This allows one to study the energetic charged particle spectra (electrons and protons) registered on Magion-3 at rather far distances from the mother IK-25 satellite in dependence of the whistler wave growth rates via normal Doppler effect for the different resonance detunings, propagation angles, and other beam/plasma parameters.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38.1567B