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Electron beams and Langmuir turbulence in solar type III radio bursts observed in the interplanetary mediumResults are presented of in situ observations of electron beams, plasma waves, and associated solar type II radio emission in the interplanetary medium near 1 AU, which were provided by the ISEE-3 spacecraft. It is shown that electron beams are formed by the faster electrons arriving before the slower ones, following an impulsive injection at the sun. The resulting bump-on-tail in the reduced 1D distribution function is unstable to the growth of electrostatic electron plasma (Langmuir) waves. The Langmuir waves are observed to be highly impulsive in nature. The onset and temporal variations of the observed plasma waves are in good qualitative agreement with the wave growth expected from the evolution of the measured 1D distribution function. The lack of obvious plateauing of the bump-on-tail suggests that the waves were removed from resonance with the beam electrons by some wave-wave interaction.
Document ID
19920048319
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Lin, R. P.
(California, University Berkeley, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Solar Physics
Accession Number
92A30943
Funding Number(s)
CONTRACT_GRANT: NAS5-30366
CONTRACT_GRANT: NAG5-376
Distribution Limits
Public
Copyright
Other

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