HR: 0800h
AN: SM21A-0313    [Abstracts]
TI: Investigating EMIC Wave Generation and Relativistic Electron Resonance
AU: * Millan, R M
EM: Robyn.Millan@dartmouth.edu
AF: Dartmouth College, Dept. of Physics and Astronomy 6127 Wilder Lab, Hanover, NH 03755, United States
AU: Woodger, L A
EM: Leslie.Woodger@dartmouth.edu
AF: Dartmouth College, Dept. of Physics and Astronomy 6127 Wilder Lab, Hanover, NH 03755, United States
AU: Denton, R E
EM: Richard.E.Denton@dartmouth.edu
AF: Dartmouth College, Dept. of Physics and Astronomy 6127 Wilder Lab, Hanover, NH 03755, United States
AB: Wave-particle interaction of relativistic electrons with electromagnetic ion cyclotron (EMIC) waves is thought to play an important role in radiation belt dynamics, and may be a dominant electron precipitation mechanism. We use data from the LANL MPA instruments to investigate the temperature anisotropy of ring current protons that may drive EMIC waves during relativistic electron precipitation events. These data are used as input to the WHAMP plasma dispersion code to solve for EMIC wave frequencies in a multi-species magnetized plasma. The minimum electron resonance energy is calculated and compared to balloon observations of precipitating electron energy spectra. We also use LEPA data from CRRES to investigate ion distributions during EMIC wave events identified in the Meredith et al. (2003) study.
DE: 2730 Magnetosphere: inner
DE: 2772 Plasma waves and instabilities (2471)
DE: 2774 Radiation belts
DE: 7867 Wave/particle interactions (2483, 6984)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting