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Abbravation: Annales Geophysicae

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Copernicus GmbH

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DOI

10.1007/bf03246547

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0992-7689

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Electron cyclotron waves in the presence of parall

Authors: Kumar S Dixit S K Gwal A K
Publish Date: 1997/01/31
Volume: 15, Issue: 1, Pages: 24-28
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Abstract

Abstract The electron cyclotron waves that originate at low altitudes 05 RE and observed by ground facilities have been studied in the presence of a weak parallel electric field in auroral magnetoplasma consisting of trapped energetic auroral electrons and cold background electrons of ionospheric origin The model distribution for auroral trapped electrons is taken as Maxwellian ring distribution An expression for the growth rate has been obtained in the presence of parallel electric field assuming that the real frequency in the whistler mode is not affected by the presence of the electric field The results show that waves grow or damp in amplitude for a parallel or antiparallel electric field The influence of the electric field is more pronounced at a shorter wavelength spectrum An increase in population of energetic electrons increases the growth rate and thus plays a significant role in the wave excitation process in the auroral regions

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  2. The relationship between VHF radar auroral backscatter amplitude and Doppler velocity: a statistical study
  3. Long-period fading in atmospherics during severe meteorological activity and associated solar geophysical phenomena at low latitudes
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  13. ELF wave generation in the ionosphere using pulse modulated HF heating: initial tests of a technique for increasing ELF wave generation efficiency
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