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Dynamics of Langmuir and ion-sound waves in type III solar radio sourcesThe study traces the evolution of Langmuir and ion-sound waves in type III sources, incorporating linear growth, linear damping, and nonlinear electrostatic decay. Improved estimates are obtained for the wavenumber range of growing waves and the nonlinear coupling coefficient for the decay process. It is shown that the conditions in the solar wind do not allow a steady state to be attained; instead, bursty linear and nonlinear interactions take place, consistent with the highly inhomogeneous and impulsive waves actually observed. Nonlinear growth is found to be rapid enough to saturate the growth of the parent Langmuir waves in the available interaction time. The competing processes of nonlinear wave collapse and quasi-linear relaxation are discussed, and it is concluded that neither is responsible for the saturation of Langmuir growth.
Document ID
19930052419
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Robinson, P. A.
(NASA Headquarters Washington, DC United States)
Willes, A. J.
(Sydney Univ. Australia)
Cairns, I. H.
(Iowa Univ. Iowa City, United States)
Date Acquired
August 16, 2013
Publication Date
May 10, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 408
Issue: 2
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
93A36416
Funding Number(s)
CONTRACT_GRANT: NAGW-2040
CONTRACT_GRANT: NAG5-1093
CONTRACT_GRANT: NSF ATM-90-21985
Distribution Limits
Public
Copyright
Other

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