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Discussion papers | Copyright
https://doi.org/10.5194/angeo-2018-38
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

ANGEO Communicates 24 May 2018

ANGEO Communicates | 24 May 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

An excitation mechanism for discrete chorus elements in the magnetosphere

Peter Bespalov1,2 and Olga Savina2 Peter Bespalov and Olga Savina
  • 1Institute of Applied Physics RAS, Nizhny Novgorod, Russia
  • 2National Research University Higher School of Economics, Nizhny Novgorod, Russia

Abstract. A beam pulsed amplifier mechanism responsible for effective amplification of short VLF electromagnetic pulses is proposed. Effective amplification near the magnetic equator outside the plasmasphere is considered. A conditional growth rate of short electromagnetic pulses is calculated. Obtained results can explain some important features of the chorus emissions without hiss-like radiation background.

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Peter Bespalov and Olga Savina
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Peter Bespalov and Olga Savina
Peter Bespalov and Olga Savina
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Short summary
VLF chorus emissions are very intense electromagnetic plasma waves that are naturally excited near the magnetic equatorial plane outside the plasmasphere. We introduce a mechanism of chorus excitation under conditions where known mechanisms become ineffective. This kind of excitation is related to the effective amplification of short electromagnetic pulses from the noise level even in a stable plasma. Obtained results can explain some important features of the chorus emissions without hiss-like.
VLF chorus emissions are very intense electromagnetic plasma waves that are naturally excited...
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