Theory of type 3b solar radio bursts

Details Theory of type 3b solar radio bursts Theory of type 3b solar radio bursts

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975stin...7618028s&link_type=abstract

Unknown

Physics

Electron Beams, Plasma Interactions, Type 3 Bursts, Electromagnetic Radiation, Electrostatic Waves, Trapped Particles

Scientific paper

During the initial space-time evolution of an electron beam injected into the corona, the strong beam-plasma interaction occurs at the head of the beam, leading to the amplification of a quasi-monochromatic large-amplitude plasma wave that stabilizes by trapping the beam particles. Oscillation of the trapped particles in the wave troughs amplifies sideband electrostatic waves. The sidebands and the main wave subsequently decay to observable transverse electromagnetic waves through the parametric decay instability. This process gives rise to the elementary striation bursts. Owing to velocity dispersion in the beam and the density gradient of the corona, the entire process may repeat at a finite number of discrete plasma levels, producing chains of elementary bursts. All the properties of the type IIIb bursts are accounted for in the context of the theory.

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