Substorm dependence of chorus amplitudes: Implications for the acceleration of electrons to relativistic energies

Details Substorm dependence of chorus amplitudes: Implications for the acceleration of electrons to relativistic energies Substorm dependence of chorus amplitudes: Implications for the acceleration of electrons to relativistic energies

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10613165m&link_type=abstract

Journal of Geophysical Research, Volume 106, Issue A7, p. 13165-13178

Physics

Plasma Physics

148

Magnetospheric Physics, Magnetospheric Physics: Storms And Substorms, Space Plasma Physics: Charged Particle Motion And Acceleration, Space Plasma Physics: Wave/Particle Interactions

Scientific paper

Intense interest currently exists in determining the roles played by various wave-particle interactions in the acceleration of electrons to relativistic energies during/following geomagnetic storms. Here we present a survey of wave data from the CRRES Plasma Wave Experiment for lower band (0.1-0.5fce) and upper band (0.5-1.0fce) chorus, fce being the electron gyrofrequency, to assess whether these waves could play an important role in the acceleration of a seed population of electrons to relativistic energies during and following geomagnetic storms. Outside of the plasmapause the chorus emissions are largely substorm-dependent, and all chorus emissions are enhanced when substorm activity is enhanced. The equatorial chorus (|λm|<15°) is strongest in the lower band during active conditions (AE>300nT) with average amplitudes typically >0.5 mV m-1 predominantly in the region 315°) is strongest in the lower band during active conditions, with average amplitudes typically >0.5 mV m-1 in the region 3

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