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| Titel |
Analysis of beam plasma instability effects on incoherent scatter spectra |
| VerfasserIn |
M. A. Diaz, J. L. Semeter, M. Oppenheim, M. Zettergren |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 12 ; Nr. 28, no. 12 (2010-12-10), S.2169-2175 |
| Datensatznummer |
250016921
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| Publikation (Nr.) |
 copernicus.org/angeo-28-2169-2010.pdf |
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| Zusammenfassung |
| Naturally Enhanced Ion Acoustic Lines (NEIALs) detected with Incoherent
Scatter Radars (ISRs) can be produced by a Langmuir decay mechanism,
triggered by a bump on tail instability. A recent model of the beam-plasma
instability suggests that weak-warm beams, such those associated with NEIAL
events, might produce Langmuir harmonics which could be detected by a
properly configured ISR. The analysis performed in this work shows that such
a beam-driven wave may be simultaneously detected with NEIALs within the
baseband signal of a single ISR. The analysis shows that simultaneous
detection of NEIALs and the first Langmuir harmonic is more likely than
simultaneous detection of NEIALs and enhanced plasma line. This detection not
only would help to discriminate between current NEIAL models, but could also
aid in the parameter estimation of soft precipitating electrons. |
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