Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 37, issue 5
Articles | Volume 37, issue 5
https://doi.org/10.5194/angeo-37-971-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-37-971-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 37, issue 5
Regular paper
 | Highlight paper
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24 Oct 2019
Regular paper | Highlight paper |  | 24 Oct 2019

Electron pairing in mirror modes: surpassing the quasi-linear limit

Rudolf A. Treumann and Wolfgang Baumjohann

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Latest update: 02 Nov 2025
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Short summary
The mirror mode starts as a zero-frequency ion fluid instability and saturates quasi-linearly at very low magnetic level, while forming extended magnetic bubbles. These trap the adiabatically bouncing electron component which forms pairs near the mirror points. The large pair anisotropy causes further growth beyond quasilinear level. Including pressure equilibrium gives and estimate of the required pair density.
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