Three-dimensional simulations of outer radiation belt electron dynamics including cross-diffusion terms

Details Three-dimensional simulations of outer radiation belt electron dynamics including cross-diffusion terms Three-dimensional simulations of outer radiation belt electron dynamics including cross-diffusion terms

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11505216x&link_type=abstract

Journal of Geophysical Research, Volume 115, Issue A5, CiteID A05216

Physics

21

Magnetospheric Physics: Numerical Modeling, Magnetospheric Physics: Radiation Belts, Magnetospheric Physics: Energetic Particles: Trapped, Magnetospheric Physics: Plasma Waves And Instabilities (2471), Magnetospheric Physics: Magnetic Storms And Substorms (7954)

Scientific paper

Using our recently introduced hybrid finite difference method, we develop a three-dimensional (3-D) code to solve a fully bounce-averaged pitch-angle and energy diffusion equation, including radial diffusion and particularly the cross-diffusion terms. We show that our 3-D code can successfully prevent the unstable numerical problems resulting from the large and rapidly varying cross diffusion coefficients. We present one of the first simulations to examine the effects of radial diffusion and chorus-electron interaction with/without cross diffusion terms on the radiation belt electron dynamics. Simulated results demonstrate that chorus waves may yield significant accelerations of energetic (˜MeV) electrons, leading to peaks in phase space density (PSD), which are subsequently smoothed by inward and outward radial diffusion. Moreover, neglecting cross-diffusion rates generally produces relatively large overestimates in the PSD evolution, implying that cross diffusion terms are very critical in the 3-D modeling of radiation belts dynamics. However, test case simulations show that such overestimates are sensitively dependent on the initial conditions together with wave models, deserving further thorough investigations.

Affiliated with

Also associated with

No associations

Rating

Three-dimensional simulations of outer radiation belt electron dynamics including cross-diffusion terms 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 Three-dimensional simulations of outer radiation belt electron dynamics including cross-diffusion terms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-dimensional simulations of outer radiation belt electron dynamics including cross-diffusion terms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-794734