Physics
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...78..141t&link_type=abstract
Solar Physics, vol. 78, May 1982, p. 141-156.
Physics
20
Finite Difference Theory, Type 3 Bursts, Computerized Simulation, Electron Beams, Electron Distribution, Numerical Stability, Plasma Waves, Radio Emission
Scientific paper
Numerical simulation of type III bursts is made by the use of a fully numerical scheme showing a general rule for obtaining a numerically stable difference scheme. The electron distribution function is one-dimensional in velocity space and the spectral energy density of the plasma waves is cylindrically symmetric in k-space. It is confirmed that the previous simulation made by the use of semianalytical method assuming the plateau distribution of electron distribution is qualitatively correct, but the number density of electron beam for a typical type III burst was overestimated by a factor of about 3. It is demonstrated that a tentative neglect of a term for the induced scattering of plasma waves into nonresonant k-range does not have an appreciable effect on the energy loss of the electron beam, though the scattering is strong. The reason is that the scattering reduces the saturation level of plasma waves resulting in a reduction of the energy loss, while a part of the energy of the electron beam is indirectly lost by the scattering.
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