HR: 0830h
AN: SH11D-1150 [PDF]
TI: Transport of solar energetic particles in non-uniform heliospheric magnetic fields: comparison between
test particle simulations and the diffusion approximation
AU: * Qin, G
EM: gqin@fit.edu
AF: Florida Institute of Technology, Department of Physics and Space Sciences, Florida Institute of
Technology, 150 West University Boulevard, Melbourne, FL 32901 United States
AU: Zhang, M
EM: mzhang@pss.fit.edu
AF: Florida Institute of Technology, Department of Physics and Space Sciences, Florida Institute of
Technology, 150 West University Boulevard, Melbourne, FL 32901 United States
AU: Dwyer, J R
EM: dwyer@pss.fit.edu
AF: Florida Institute of Technology, Department of Physics and Space Sciences, Florida Institute of
Technology, 150 West University Boulevard, Melbourne, FL 32901 United States
AU: Rassoul, H K
EM: rassoul@pss.fit.edu
AF: Florida Institute of Technology, Department of Physics and Space Sciences, Florida Institute of
Technology, 150 West University Boulevard, Melbourne, FL 32901 United States
AB:
Solar energetic particles are highly anisotropic, so it is necessary to use an
anisotropic equation to study their transport. The simulations of charged
particle orbits in the Parker field with model turbulence will be
used to study the properties of the magnetic focussing effect, adiabatic
cooling, and diffusive transport in pitch angle distribution of solar
energetic particles. A derived formula will be shown for the adiabatic
cooling effect of particles with an anisotropic distribution. The time profile
of particles' pitch angle will be obtained from the numerical computations in
order to study the magnetic focussing effect and the particle pitch angle
diffusive transport due to turbulence. The time profile of particle momentum
will also be obtained from the numerical simulations to study the adiabatic
cooling effect; and it will be compared with analytic formulae
of the adiabatic cooling rate.
This work is partly supported by NSF SHINE Grant 0203252 and NASA Grant NAG5-13514.
DE: 2102 Corotating streams
DE: 2118 Energetic particles, solar
DE: 7514 Energetic particles (2114)
DE: 7859 Transport processes
DE: 7863 Turbulence
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting