HR: 0800h
AN: SM21A-0320    [Abstracts]
TI: Using Particle Observations from Geosynchronous Orbit as a Proxy for Whistler and EMIC Mode Wave Growth
AU: * Blum, L W
EM: lblum@lanl.gov
AF: International, Space, and Response (ISR-1), Los Alamos National Laboratory, Los Alamos, NM 87544, United States
AU: MacDonald, E A
EM: macdonald@lanl.gov
AF: International, Space, and Response (ISR-1), Los Alamos National Laboratory, Los Alamos, NM 87544, United States
AU: Thomsen, M F
EM: mthomsen@lanl.gov
AF: International, Space, and Response (ISR-1), Los Alamos National Laboratory, Los Alamos, NM 87544, United States
AU: Gary, S P
EM: pgary@lanl.gov
AF: International, Space, and Response (ISR-1), Los Alamos National Laboratory, Los Alamos, NM 87544, United States
AU: Denton, M H
EM: m.denton@lancaster.ac.uk
AF: Space Plasma Environment and Radio Science (SPEARS), Lancaster University, Lancaster, LA1 4WA, United Kingdom
AU: Borovsky, J E
EM: jborovsky@lanl.gov
AF: International, Space, and Response (ISR-1), Los Alamos National Laboratory, Los Alamos, NM 87544, United States
AB: There is still much to learn about the factors that affect the production of relativistic electrons in the magnetosphere. Multipoint LANL geosynchronous plasma data may be used to examine the characteristics of the electron source population related to the growth of whistler mode waves. Superposed epoch analysis is ideal to infer the local time evolution of whistler mode waves during geomagnetic storms. Using this technique, above average growth of whistler mode waves in the late recovery phase correlates with above average fluxes of relativistic electrons in the same time period. Quasi-linear wave theory can also be used to develop a proxy for electromagnetic ion cyclotron (EMIC) wave growth depending on the ion anisotropy and density. We will apply the same technique of superposed epoch analysis to look at EMIC wave growth during plasmaspheric plumes and geomagnetic storms. Together, the extensive particle observations from geosynchronous orbit serving as a proxy for two different wave modes may shed light on the relationship between competing source and loss mechanisms for relativistic electrons during storms.
DE: 2764 Plasma sheet
DE: 2772 Plasma waves and instabilities (2471)
DE: 2774 Radiation belts
DE: 2788 Magnetic storms and substorms (7954)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting