Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....91....7v&link_type=abstract
Astronomy and Astrophysics, vol. 91, no. 1-2, Nov. 1980, p. 7-16.
Astronomy and Astrophysics
Astrophysics
5
Electron Plasma, Electrostatic Waves, Landau Damping, Magnetohydrodynamic Stability, Plasma Turbulence, Self Consistent Fields, Coupled Modes, Differential Equations, Electron Distribution, Evolution (Development), Particle Acceleration
Scientific paper
An initial value problem of the high-frequency Langmuir wave electric field in two spatial dimensions expressed by the split-timestep Fourier method is solved for the case when two equally strong wave vector pumps are initialized in the k-space. One case corresponds to weak Langmuir turbulence indicating that time evolution agrees with weak turbulence concepts of Landau damping and three-wave decay interactions. In the case of strong Langmuir turbulence, the soliton collapse to the smallest length scales is prevented by Landau damping. It is concluded that the shape of electron velocity distribution is approximately constant up to a specific maximum velocity, but rapidly decreases at larger velocities.
Hoyng Peter
Nicholson Dwight R.
van Grunsven F. J. T.
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