HR: 0800h
AN: SH41A-0305    [Abstracts]
TI: Temporary topological trapping and escape of charged particles in a flux tube
AU: Tooprakai, P
EM: mpaisan@hotmail.com
AF: Department of Physics, Faculty of Science,Chulalongkorn University, Chulalongkorn University, Bangkok, 10330, Thailand
AU: * Chuychai, P
EM: paeng@bartol.udel.edu
AF: Bartol Reseach Institute, Department of Physics and Astronomy, University of Delaware, University of Delaware, Newark, DE 19716, United States
AU: Minnie, J
EM: minnie@bartol.udel.edu
AF: Bartol Reseach Institute, Department of Physics and Astronomy, University of Delaware, University of Delaware, Newark, DE 19716, United States
AU: Ruffolo, D
EM: david_ruffolo@yahoo.com
AF: Department of Physics, Faculty of Science, Mahidol University, Mahidol University, Bangkok, 10400, Thailand
AU: Bieber, J W
EM: john@bartol.udel.edu
AF: Bartol Reseach Institute, Department of Physics and Astronomy, University of Delaware, University of Delaware, Newark, DE 19716, United States
AU: Matthaeus, W H
EM: whm@udel.edu
AF: Bartol Reseach Institute, Department of Physics and Astronomy, University of Delaware, University of Delaware, Newark, DE 19716, United States
AB: The scenario of temporary trapping of magnetic field lines and their subsequent suppressed diffusive escape from topological magnetic structures embedded in turbulence has been offered as a way to understand the persistence of "dropouts", or sharp gradients in observed heliospheric energetic particle intensities. Here we present a set of numerical experiments to show the basic physics of this process: charged test particles can be temporarily trapped in flux tubes and then escape due to slab turbulence of magnetic field. The overall effect is a delay in the onset of time-asymptotic transport. We thus confirm that previous arguments based on field line transport are also applicable to test particle transport.
DE: 7514 Energetic particles (2114)
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Fall Meeting