Physics – Plasma Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11506106h&link_type=abstract
Journal of Geophysical Research, Volume 115, Issue A6, CiteID A06106
Physics
Plasma Physics
2
Space Plasma Physics: Wave/Wave Interactions, Space Plasma Physics: Parametric Processes, Interplanetary Physics: Solar Wind Plasma, Interplanetary Physics: Plasma Waves And Turbulence, Space Plasma Physics: Electrostatic Structures
Scientific paper
Recent observation of large-amplitude Langmuir waveforms during a type III event in the solar wind has been interpreted as the signature of the electrostatic decay of beam-driven Langmuir waves. This mechanism is thought to be a first step to explain the generation of type III radio emission. The threshold for this parametric instability in the typical solar wind condition has been investigated through 1D-1V Vlasov-Poisson simulations. We show that the amplitude of the observed Langmuir beatlike waveforms is of the order of the effective threshold computed from the simulations. The expected levels of associated ion acoustic density fluctuations have also been computed for comparison with observations.
Briand Carine
Califano Francesco
Henri Pierre
Mangeney Andre
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