HR: 11:35h
AN: SH12A-06    [Abstracts]
TI: Modeling Multispacecraft Observations of Flux Dropouts seen in Impulsive Solar Particle Events
AU: * Giacalone, J
EM: giacalon@lpl.arizona.edu
AF: University of Arizona, Lunar and Planetary Laboratory, Tucson, AZ 85721 United States
AU: Mazur, J
EM: joseph.e.mazur@aero.org
AF: Aerospace Corporation, 2350 E. El Segundo Blvd., El Segundo, CA 90245 United States
AU: Chollet, E
EM: echollet@lpl.arizona.edu
AF: University of Arizona, Lunar and Planetary Laboratory, Tucson, AZ 85721 United States
AB: We discuss new results from the analysis and modeling of the propagation of energetic particles associated with impulsive solar flares along the braided interplanetary magnetic field. Observations made by ACE/ULEIS have shown that many impulsive solar-flare events (tens of keV to MeV energies) often reveal fine-scale variations in which the intensity flickers on and off during the event. The flux dropouts are non-dispersive. One accepted interpretation of these events consists of intermittent particle fluxes resulting from the passage of the spacecraft through alternately filled and empty flux tubes. These variations are caused by field lines which were either connected or not connected to the flare site. Here we extend our previous analysis of these events (Giacalone et al.~Astrophys.~J.~Lett., {\it 532}, L75, 2000) and simulate the expected flux variations seen by more than one spacecraft with arbitrary orientations. We will compare the model results with observations made by WIND and ACE, an extension of the work by Mazur et al.~(Astropyhs.~J.~Lett., {\it 532}, L79, 2000), whenever possible.
DE: 7514 Energetic particles (2114)
DE: 7519 Flares
DE: 7524 Magnetic fields
DE: 7807 Charged particle motion and acceleration
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2004 AGU Fall Meeting