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| Titel |
Vlasov simulation of Langmuir wave packets |
| VerfasserIn |
T. Umeda |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 14, no. 5 ; Nr. 14, no. 5 (2007-10-25), S.671-679 |
| Datensatznummer |
250012283
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| Publikation (Nr.) |
 copernicus.org/npg-14-671-2007.pdf |
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| Zusammenfassung |
| Amplitude modulation and packet formation
of Langmuir waves are commonly observed
during a nonlinear interaction between electron beams and plasmas.
In this paper,
we briefly review
the history of Langmuir wave packets
as developed by recent spacecraft observations and computer simulations.
New one-dimensional electrostatic Vlasov simulations are
performed to study their formation processes.
It is found that the formation of Langmuir wave packets
involves both an incoherent turbulent process
and a coherent nonlinear trapping process.
Existence of cold ions does not affect
nonlinear processes of the weak-electron-beam instability
in which the ion distribution is hardly modified by the
excited Langmuir wave packets. |
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