Model of the energization of outer-zone electrons by whistler-mode chorus during the October 9, 1990 geomagnetic storm

Summers, D.; Ma, C.; Meredith, N.P.; Horne, R.B. ORCID: https://orcid.org/0000-0002-0412-6407; Thorne, R.M.; Heynderickx, D.; Anderson, R.R.. 2002 Model of the energization of outer-zone electrons by whistler-mode chorus during the October 9, 1990 geomagnetic storm. Geophysical Research Letters, 29 (24), 2174. 27-1-27-4. https://doi.org/10.1029/2002GL016039

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Abstract/Summary

[1] Relativistic (> 1 MeV) 'killer electrons' are frequently generated in the Earth's inner magnetosphere during the recovery phase of a typical magnetic storm. We test the hypothesis that the energization of electrons takes place by means of stochastic gyroresonant interaction between lower-energy (several 100 keV) seed electrons and whistler-mode chorus waves. We develop a model kinetic equation for the electron energy distribution, and utilize both electron and whistler-mode wave data at L=4 for a typical geomagnetic storm (on October 9, 1990) from instruments carried on the Combined Release and Radiation Effects Satellite (CRRES). Our model solutions are found to match well with the CRRES profiles of the electron flux. We conclude that the mechanism of stochastic acceleration by whistler-mode turbulence is a viable candidate for generating killer electrons, not only for the storm considered, but for similar storms with a several-day recovery phase containing prolonged substorm activity.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1029/2002GL016039
Programmes:	BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Magnetic Reconnection, Substorms and their Consequences
ISSN:	00948276
NORA Subject Terms:	Atmospheric Sciences
Date made live:	10 Aug 2010 13:41 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/10172

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1029/2002GL016039

Programmes:

BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Magnetic Reconnection, Substorms and their Consequences

ISSN:

00948276

NORA Subject Terms:

Atmospheric Sciences

Date made live:

10 Aug 2010 13:41 +0 (UTC)