Particle Trapping and Dropouts in Magnetic Turbulence in a Spherical Geometry

Details Particle Trapping and Dropouts in Magnetic Turbulence in a Spherical Geometry Particle Trapping and Dropouts in Magnetic Turbulence in a Spherical Geometry

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh13a0396t&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH13A-0396

Mathematics

Logic

2134 Interplanetary Magnetic Fields, 2149 Mhd Waves And Turbulence (2752, 6050, 7836), 7514 Energetic Particles (2114), 7807 Charged Particle Motion And Acceleration

Scientific paper

The observed dropouts of solar energetic particles from impulsive solar events (i.e., the inhomogeneity and sharp gradients in particle density) indicate the partial filamentation of magnetic connection from small regions of the corona to Earth orbit. This can be understood in terms of persistent trapping of field lines due to small- scale topological structures in the solar wind. We further explore how this turbulence structure should be manifest in particle observations, by evaluating particle trajectories obtained from the Newton-Lorentz equations. By adapting a two-component model of turbulence to spherical geometry, we include the adiabatic focusing of particles. The 2D magnetic field is generated by either 1) a 2D fast Fourier transform, a valid approximation over a small angular region, or 2) a spherical harmonic series with ℓ up to 2000. Dropout features at 1 AU are clearly indicated for low-energy particles, but these features are washed out for E >~ 100 MeV. Different time-intensity profiles are found at locations at 1 AU that are distinct with regard to the small-scale topology. Partially supported by the Thailand Research Fund, the Rachadapisek Sompoj Fund of Chulalongkorn University, and NASA Grant NNG05GG83G.

Affiliated with

Also associated with

No associations

Rating

Particle Trapping and Dropouts in Magnetic Turbulence in a Spherical Geometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Particle Trapping and Dropouts in Magnetic Turbulence in a Spherical Geometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Particle Trapping and Dropouts in Magnetic Turbulence in a Spherical Geometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-967015