Paper#: 72
Poster #:
Session Name: Workshop 4A: Tail Instabilities
Room: 200ABC
Day: Tuesday
Time: 2:15-2:40 p.m.
Abstract Title: Influence and Signatures of Energetic Particles in Substorm Development
PresentSurname: Li, X.
All Authors: X. Li, T. E. Sarris, D. N. Baker, M.A. Temerin, G.D. Reeves
Abstract : A common feature of magnetospheric substorms is the discrete injection of energetic electrons and ions of tens to hundreds of keV often observed at geosynchronous orbit. Depending on the local time of the measurement, these injections can appear to be dispersionless, indicating that fluxes of electrons and ions of different energies are enhanced at the same time. The dispersionless injections measured at geostationary orbit have been reproduced using test-particle simulation [Li et al., 1998]. Recently, the dispersionless injections observed by CRRES, inside geostationary orbit, have also been investigated and most observed features have been reproduced [Sarris et al., 2002]. The question still remains: how can the energetic electrons be injected inward at a speed of 24 km/s (inside geostationary orbit) and still remain dispersionless? Another question will be discussed in this presentation is the relation of substorm injected particles and radiation belt particles [Li et al., 1998] Li, X., D. N. Baker, M. Temerin, G. Reeves, R. Belian, Simulation of Dispersionless Injections and Drift Echoes of Energetic Electrons Associated with Substorms, Geophys. Res. Lett., 25, 3763, 1998. [Sarris et al., 2002] Sarris, T. E., X. Li, N. Tsaggas, N. Paschalidis, Modeling Energetic Particle Injections in Dynamic Pulse Fields with Varying Propagation Speeds, J. of Geophys. Res., in press, 2002.