HR: 0800h
AN: SM21A-0335    [Abstracts]
TI: Energetic Electron and Pc5 ULF wave interactions during magnetic storms
AU: * Lee, E
EM: ealee@phys.ualberta.ca
AF: University of Alberta, Dept. of Physics 11322 - 89 Avenue, Edmonton, AB T6G 2G7, Canada
AU: Mann, I R
EM: imann@phys.ualberta.ca
AF: University of Alberta, Dept. of Physics 11322 - 89 Avenue, Edmonton, AB T6G 2G7, Canada
AU: Ozeke, L G
EM: lozeke@phys.ualberta.ca
AF: University of Alberta, Dept. of Physics 11322 - 89 Avenue, Edmonton, AB T6G 2G7, Canada
AB: There has been increased interest in relativistic electrons in the inner magnetosphere mainly due to the correlation between the occurrence of enhancing relativistic electron flux and spacecraft operation anomalies or even failures [e.g., Baker et al, 1994]. However, the dominant processes which accelerate magnetospheric electrons to MeV energies are not well understood. Many recent observations suggested that enhancement of energetic electrons are closely associated with ULF waves in Pc4 (7-22 mHz) or Pc5 (1-7 mHz) frequency ranges. Our goal is to examine the electron drift-resonance interaction with Pc5 ULF waves during magnetic storm time. Here, we will show the results of observations from ground based magnetometers, Polar spacecraft, LANL Geosynchronous satellites and the CRRES Medium Energy A (MEA) spectrometer. We observed very strong Pc5 oscillations during the great magnetic storm of March 24, 1991 [ Lee et al., 2007] and electron flux simultaneously oscillating with the same frequencies in the time domain. We also characterized a number of other events and present an examination of the relationship between the electron flux modulation and Pc5 ULF pulsations.
DE: 2483 Wave/particle interactions (7867)
DE: 2720 Energetic particles: trapped
DE: 2730 Magnetosphere: inner
DE: 2774 Radiation belts
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting