NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Beat-type Langmuir wave emissions associated with a type III solar radio burst: Evidence of parametric decayRecent measurements from the plasma wave instrument on the Galileo spacecraft have shown that Langmuir waves observed in conjunction with a type III solar radio burst contain many beat-type waveforms, with beat frequencies ranging from about 150 to 650 Hz. Strong evidence exists that the beat pattern is produced by two closely spaced narrowband components. The most likely candidates for these two waves are a beam-generated Langmuir wave and an oppositely propagating Langmuir wave produced by parametric decay. In the parametric decay process, nonlinear interactions cause the beam-driven Langmuir wave to decay into a Langmuir wave and a low-frequency ion sound wave. Comparisons of the observed beat frequency are in good agreement with theoretical predictions for a three-wave parametric decay process. Weak low-frequency emissions are also sometimes observed at the predicted frequency of the ion sound wave.
Document ID
19950056913
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hospodarsky, G. B.
(Univ. of Iowa, Iowa, IA United States)
Gurnett, D. A.
(Univ. of Iowa, Iowa, IA United States)
Date Acquired
August 16, 2013
Publication Date
May 15, 1995
Publication Information
Publication: Geophysical Research Letters
Volume: 22
Issue: 10
ISSN: 0094-8276
Subject Category
Solar Physics
Accession Number
95A88512
Funding Number(s)
CONTRACT_GRANT: JPL-958779
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available