Physics
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335..425l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 335, Dec. 1, 1988, p. 425-440.
Physics
4
Electron Acceleration, Electron Beams, Electrostatic Waves, Plasma Turbulence, Solar Corona, Solar Radio Bursts, Equations Of State, Iterative Solution, Magnetohydrodynamic Stability, Nonthermal Radiation
Scientific paper
The stability and propagation of nonthermal electron beams that produce type III solar radio bursts is studied. A model for the spatial structure of such a beam, based on the physics of strong Langmuir turbulence, is presented. In this model it is assumed that the beam-generated waves reach the threshold for nonlinear (modulation) instability over a narrow spatial region. This region, denoted the beam "front", moves at a velocity that corresponds to the velocity deduced from the type III drift rate. Assuming a steady state, the wave and particle distributions, as functions of velocity and distance ahead of the front, are computed self-consistently, using quasi-linear theory in a frame that moves with the front.
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