Energetic electron responses in the inner magnetosphere during geomagnetic storms

Details Energetic electron responses in the inner magnetosphere during geomagnetic storms Energetic electron responses in the inner magnetosphere during geomagnetic storms

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsm43a..05f&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM43A-05

Physics

2716 Energetic Particles: Precipitating, 2720 Energetic Particles: Trapped, 2730 Magnetosphere: Inner, 2774 Radiation Belts

Scientific paper

The radiation belt is known to respond dramatically during geomagnetic storms. Its behaviors vary from large fluctuations in the outer-belt electron fluxes to dramatic filling and recovery of the slot. Such dynamics are caused by the combined results of electron impulsive accelerations, drift-resonant accelerations, diffusive and loss processes, each having a different effective time scale. What are the different characteristic time scales of the various processes? In this paper, we will address this question by examining the variations of energetic electron responses during different magnitude storms, in which different processes may be dominant. A key issue concerning the construction of magnetospheric state-based radiation belt models [Fung, 1996; Fung et al., 2005] is the proper association of particle environment with a given magnetospheric state, taking into account of finite response times of particle populations as a function of energy and location. Using results obtained from this study, we will discuss how electron dynamics may be incorporated into a magnetospheric state-based radiation belt model. Fung, S. F., Recent development in the NASA trapped radiation models,in Radiation belts Models and Standards, Geophy. Monogr., 97, AGU,Washington, D. C., 79-91, 1996. Fung, S. F., E. V. Bell, L. C. Tan, R. M. Candey, M. J. Golightly, S. L. Huston, J. H. King, and R. E. McGuire, Development of a magnetospheric state-based trapped radiation database, Adv. Space Research, vol. 36, issue 10, pp. 1984-1991,doi:10.1016/j.asr.2004.04.020, 2005.

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