Articles | Volume 37, issue 5
https://doi.org/10.5194/angeo-37-971-2019
https://doi.org/10.5194/angeo-37-971-2019
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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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Cited articles

Ahmadi, N., Wilder, F. D., Ergun, R. E., Argall, M., Usanova, M. E., Breuillard, H., Malaspina, D., Paulson, K., Germaschewski, K., Eriksson, S., Goodrich, K., Torbert, R., Le Contel, O., Strangeway, R. J., Russell, C. T., Burch, J., and Giles, B.: Generation of electron whistler waves at the mirror mode magnetic holes: MMS observations and pic simulations, J. Geophys. Res., 123, 6383–6393, https://doi.org/10.1029/2018JA025452, 2018. a
Balogh, A. and Treumann, R. A.: Physics of Collisionless Shocks, Springer-Verlag, New York, 500 pp., https://doi.org/10.1007/978-1-4614-6099-2, 2013. a
Bardeen, J., Cooper, L. N., and Schrieffer, J. R.: Theory of superconductivity, Phys. Rev., 108, 1175–1204, https://doi.org/10.1103/PhysRev.108.1175, 1957. a, b
Baumjohann, W. and Treumann, R. A.: Basic Space Plasma Physics. London 1996, revised and enlarged edition, Imperial College Press, London, https://doi.org/10.1142/P850, 2012. a, b
Baumjohann, W., Treumann, R. A., Georgescu, E., Haerendel, G., Fornacon, K.-H., and Auster, U.: Waveform and packet structure of lion roars, Ann. Geophys., 17, 1528–1534, https://doi.org/10.1007/s00585-999-1528-9, 1999. a
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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.