Physics – Atomic Physics
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...96..181m&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 96, March 1985, p. 181-198.
Physics
Atomic Physics
53
Electron Beams, Electrostatic Waves, Plasma Density, Plasma-Particle Interactions, Quenching (Atomic Physics), Type 3 Bursts, Anisotropic Media, Distribution Functions, Plasma Waves, Solar Wind, Solitary Waves, Steady State, Wave Interaction, Wave Propagation
Scientific paper
The highly variable, yet low, level of Langmuir waves measured in situ by spacecraft when electron beams associated with type III solar bursts are passing by are addressed by a model based on the existence of large scale density fluctuations capable of sufficiently diffusing small-k beam-unstable Langmuir waves in phase space. The model is also informed by the presence of a significant isotropic nonthermal tail in the distribution function of the background electron population, which is capable of stabilizing larger k modes. The model is able to predict various levels of Langmuir waves, depending on the parameters; calculations indicate that, for realistic parameters, the most unstable small k modes are fully stabilized, while some oblique mode with higher k and lower growth rate may remain unstable.
Goldman Martin V.
Muschietti L.
Newman Dara
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