Articles | Volume 36, issue 5
https://doi.org/10.5194/angeo-36-1201-2018
https://doi.org/10.5194/angeo-36-1201-2018
ANGEO Communicates
 | 
18 Sep 2018
ANGEO Communicates |  | 18 Sep 2018

An excitation mechanism for discrete chorus elements in the magnetosphere

Peter Bespalov and Olga Savina

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Latest update: 26 Feb 2024
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Short summary
A VLF chorus is a very intense electromagnetic plasma wave that is naturally excited as a succession of discrete emissions near the magnetic equatorial plane outside the plasmasphere. We introduce a mechanism of chorus excitation under conditions when known mechanisms become ineffective. This kind of excitation is related to the 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.