The cascade theory of Type III radiobursts (fast and slow beams in the solar corona)

Details The cascade theory of Type III radiobursts (fast and slow beams in the solar corona) The cascade theory of Type III radiobursts (fast and slow beams in the solar corona)

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993azh....70..571k&link_type=abstract

Astronomicheskij Zhurnal (ISSN 0004-6299), vol. 70, no. 3, p. 571-582.

Astronomy and Astrophysics

Astronomy

3

Electron Beams, Electrostatic Waves, Magnetohydrodynamic Stability, Solar Corona, Type 3 Bursts, Beam Interactions, Magnetohydrodynamic Turbulence, Plasma-Particle Interactions

Scientific paper

Several consequences of the cascade model are discussed. It is shown within the framework of the cascade model of Type III radiobursts that an electron beam can overtake the Langmuir turbulence resulting from the fundamental-tone emission decay in the layer corresponding to one-fourth of the critical density. For this 'fast' beam, the growth of Langmuir waves, due to plasma-beam instability, must start from a level significantly exceeding the thermal one. The difference between the intensity and shape of a burst generated directly by the beam and a burst resulting from decays in the cascade model is discussed.

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