HR: 0800h
AN: SM41A-1124    [Abstracts]
TI: Transforming Away the Cross Term in Quasilinear Diffusion
AU: * Albert, J M
EM: jay.albert@hanscom.af.mil
AF: Air Force Research Lab/VSBX, 29 Randolph Rd, Hanscom AFB, MA 01731-3010 United States
AU: Young, S L
EM: shawn.young@hanscom.af.mil
AF: Air Force Research Lab/VSBX, 29 Randolph Rd, Hanscom AFB, MA 01731-3010 United States
AB: Two dimensional quasilinear diffusion can play an important role in wave-particle interactions, e.g. in stormtime acceleration of electrons. The appropriate diffusion coefficients have been calculated, but time-dependent solution of the diffusion equation is numerically difficult because of the often large and rapidly varying cross term. Transforming to variables aligned with the eigenvectors of the diffusion matrix leads the cross term to vanish, which is a large physical, mathematical, and numerical simplification. Details of the transformation and physical interpretation will be presented, along with application to a model problem.
DE: 7867 Wave/particle interactions
DE: 2716 Energetic particles, precipitating
DE: 2720 Energetic particles, trapped
DE: 2730 Magnetosphere--inner
DE: 2753 Numerical modeling
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting