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| Titel |
Electron acoustic solitons in the presence of an electron beam and superthermal electrons |
| VerfasserIn |
S. Devanandhan, S. V. Singh, G. S. Lakhina, R. Bharuthram |
| 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 ; 18, no. 5 ; Nr. 18, no. 5 (2011-09-23), S.627-634 |
| Datensatznummer |
250013970
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| Publikation (Nr.) |
 copernicus.org/npg-18-627-2011.pdf |
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| Zusammenfassung |
| Arbitrary amplitude electron acoustic solitons are studied in an
unmagnetized plasma having cold electrons and ions, superthermal hot
electrons and an electron beam. Using the Sagdeev pseudo potential method,
theoretical analysis is carried out by assuming superthermal hot electrons
having kappa distribution. The results show that inclusion of an electron
beam alters the minimum value of spectral index, κ, of the
superthermal electron distribution and Mach number for which
electron-acoustic solitons can exist and also changes their width and
electric field amplitude. For the auroral region parameters, the maximum
electric field amplitudes and soliton widths are found in the range ~(30–524) mV m−1
and ~(329–729) m, respectively,
for fixed Mach number M = 1.1 and for electron beam speed of (660–1990) km s−1. |
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