Generation mechanism of whistler waves produced by electron beam injection in space

Details Generation mechanism of whistler waves produced by electron beam injection in space Generation mechanism of whistler waves produced by electron beam injection in space

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..883p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Aug. 1989, p. 883-886.

Physics

12

Beam Injection, Electron Beams, Plasma-Particle Interactions, Relativistic Particles, Whistlers, Earth Ionosphere, Plasma Diagnostics, Plasma Jets, Wave Generation

Scientific paper

Electromagnetic particle simulations are used to determine the generation mechanism of the whistler waves observed in connection with the artificial injection of electron beams in the ionosphere. The production of the waves is shown to be closely connected with the beam-plasma interaction, which leads to the formation of a current structure which acts like an antenna and emits the whistler waves in a coherent manner. This process, in contrast to a mechanism involving amplification of radiation by a whistler mode plasma instability within the beam, allows the whistlers to be generated even though the beam width is less than one wavelength.

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