HR: 13:55h
AN: SM43D-02    [Abstracts]
TI: Pc5 ULF, energetic Oxygen Ion, and EMIC Wave-Particle Interactions During the Halloween 2003 Storm
AU: * Mann, I R
EM: imann@phys.ualberta.ca
AF: Dept. of Physics, University of Alberta, Avadh Bhatia Physics Laboratory, Edmonton, AB T6G 2J1 Canada
AU: Rae, I J
EM: jrae@phys.ualberta.ca
AF: Dept. of Physics, University of Alberta, Avadh Bhatia Physics Laboratory, Edmonton, AB T6G 2J1 Canada
AU: Kistler, L
EM: lynn.kistler@unh.edu
AF: Dept. of Physics, University of New Hampshire, 39 College Road, Durham, NH 03824 United States
AU: Engebretson, M
EM: engebret@augsburg.edu
AF: Physics Department, Augsburg College, 2211 Riverside Avenue, Minneapolis, MN 55454 United States
AB: We present observations of ULF wave-particle interactions from the 29th October 2003, during the Halloween storms period. Pc5 ULF waves are observed with the CANOPUS (now CARISMA) magnetometer array, during a conjugate pass of the Cluster spacecraft. The CANOPUS magnetometers measure a discrete frequency global Pc5 wave in the 1300-1400 UT interval. At the same time, the O+ flux from the CODIF instrument on Cluster shows a non-uniform response in anti-parrallel look directions, implying a non-uniform gyro-tropic particle response of the O+ to the ULF waves. During the same period, the FGM on Cluster shows strongly enhanced waves in the Pc1 band below the local O+ gyrofrequency, which are unusually dominated by the compressional magnetic component. We discuss possible causal inter-relationships between the ULF waves, the observed O+ distributions, and the EMIC waves. We further discuss the implications of these interactions, and highlight the value of ground-satellite conjunctions in understanding the excitation and influence of these waves on radiation belt electrons. These relationships will be of particular importance for the NASA Radiation Belt Storm Probes and CSA ORBITALS missions.
DE: 2752 MHD waves and instabilities (2149, 6050, 7836)
DE: 2772 Plasma waves and instabilities (2471)
DE: 2778 Ring current
DE: 2788 Magnetic storms and substorms (7954)
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005