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| Titel |
Electron acoustic solitary waves with non-thermal distribution of electrons |
| VerfasserIn |
S. V. Singh, G. S. Lakhina |
| 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 ; 11, no. 2 ; Nr. 11, no. 2 (2004-04-14), S.275-279 |
| Datensatznummer |
250009140
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| Publikation (Nr.) |
 copernicus.org/npg-11-275-2004.pdf |
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| Zusammenfassung |
| Electron-acoustic solitary waves are studied in an unmagnetized
plasma consisting of non-thermally distributed electrons, fluid
cold electrons and ions. The Sagdeev pseudo-potential technique is
used to carry out the analysis. The presence of non-thermal
electrons modifies the parametric region where electron acoustic
solitons can exist. For parameters representative of auroral zone
field lines, the electron acoustic solitons do not exist when
either α > 0.225 or Tc/Th > 0.142, where α is
the fractional non-thermal electron density, and Tc (Th)
represents the temperature of cold (hot) electrons. Further, for
these parameters, the simple model predicts negatively charged
potential structures. Inclusion of an electron beam in the model
may provide the positive potential solitary structures. |
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