HR: 0830h
AN: SM51C-0540    [PDF]
TI: Simulation of energetic electrons dynamics on the Oct. 2001 magnetic storm
AU: * Miyoshi, Y S
EM: miyoshi@pparc.geophys.tohoku.ac.jp
AF: Space Science Center, University of New Hampshire, 39 College Road, Durham, NH 03824 United States
AU: * Miyoshi, Y S
EM: miyoshi@pparc.geophys.tohoku.ac.jp
AF: Planetary Plasma and Atmospheric Research Center, Tohoku University, Aramaki Aoba, Sendai, 980-8758 Japan
AU: Jordanova, V K
EM: vania.jordanova@unh.edu
AF: Space Science Center, University of New Hampshire, 39 College Road, Durham, NH 03824 United States
AU: Thomsen, M F
EM: mthomsen@lanl.gov
AF: Los Alamos National Laboratory, Mail Stop D-466, Los Alamos, NM 87545 United States
AU: Reeves, G D
EM: reeves@lanl.gov
AF: Los Alamos National Laboratory, Mail Stop D-466, Los Alamos, NM 87545 United States
AU: Evans, D S
EM: david.s.evans@noaa.gov
AF: SEC/NOAA, 325 Broadway, Boulder, CO 80303 United States
AU: Morioka, A
EM: morioka@pparc.geophys.tohoku.ac.jp
AF: Planetary Plasma and Atmospheric Research Center, Tohoku University, Aramaki Aoba, Sendai, 980-8758 Japan
AU: Kasahara, Y
EM: kasahara@is.t.kanazawa-u.ac.jp
AF: Kanazawa University, 2-40-20 Kodatsuno, Kanazawa, 920-8667 Japan
AU: Nagai, T
EM: nagai@geo.titech.ac.jp
AF: Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551 Japan
AU: Green, J
EM: Janet.Green@noaa.gov
AF: SEC/NOAA, 325 Broadway, Boulder, CO 80303 United States
AB: We study the storm event occurred in October 2001 and examine the dynamics of energetic electrons in the inner magnetosphere using satellite observations and numerical simulations. The storm has a well-developed main phase and slow recovery phase, although the substorm activity in the recovery phase is quite small. During the storm, NOAA, Akebono and Polar satellites successively observe the spatial and temporal evolution of energetic particles and plasma waves in the inner magnetosphere. The hot electrons increase at the dawn-side from main phase to early recovery phase. In contrast, the relativistic electrons in the outer belt disappear during the main phase but show significant enhancement around the late main phase to early recovery phase. We simulate the evolution of phase space distribution function of ring current and radiation belt electrons for energy range from a few hundred eV to a few MeV using the UNH RAM code [Jordanova et al., JGR, 106, 7, 2001], which solves the time-dependent, bounce-averaged kinetic equation of particle drifts, radial diffusion and loss due to Coulomb collisions. We also consider wave-particle interactions in the model. In the simulation, the time-dependent particle distributions measured from the MPA and SOPA instruments on the geosynchronous LANL satellites are used as the outer boundary conditions. We compare the RAM simulation with satellite observations and study the time-evolution of global particle distribution during the storm. We also discuss the contribution of each physical process to particle transport and loss.
DE: 2720 Energetic particles, trapped
DE: 2730 Magnetosphere--inner
DE: 7807 Charged particle motion and acceleration
DE: 7843 Numerical simulation studies
DE: 7867 Wave/particle interactions
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting