Ion transport and Lévy random walk across the magnetopause in the presence of magnetic turbulence

Details Ion transport and Lévy random walk across the magnetopause in the presence of magnetic turbulence Ion transport and Lévy random walk across the magnetopause in the presence of magnetic turbulence

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1395g&link_type=abstract

Journal of Geophysical Research, Volume 108, Issue A11, pp. SMP 6-1, CiteID 1395, DOI 10.1029/2003JA010087

Physics

Plasma Physics

8

Space Plasma Physics: Turbulence, Space Plasma Physics: Transport Processes, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers

Scientific paper

A numerical study of magnetosheath ion motion in the magnetopause current sheet in the presence of magnetic fluctuations is reported. Test particles are injected at the magnetosheath side only. The magnetic field turbulence is modeled as a power law spectrum in phase space, which reaches maximum intensity in the center of the magnetopause current sheet and decreases toward the magnetosheath and magnetosphere boundaries, creating magnetic islands. The number of particles entering the magnetosphere, reflected from the magnetopause, and flowing away from the flanks is computed, as a function of the fluctuation level of the turbulence and of the magnetic field shear parameter. All those quantities appear to be strongly dependent on the fluctuation level, with the number of particles entering the magnetopause increasing with the fluctuation level. The density profile for a localized source in the magnetosheath is not Gaussian but rather has a long tail extending into the magnetopause. The statistical analysis of the ion motion along the direction normal to the magnetopause reveals that the ions perform a Lévy random walk, so that the penetrating particles could reach the magnetospheric side of the simulation box with few long jumps in between the magnetic islands. This shows that plasma transport across the magnetopause in presence of magnetic turbulence is non-Gaussian and needs to be described in terms of enhanced, superdiffusive transport.

Affiliated with

Also associated with

No associations

Rating

Ion transport and Lévy random walk across the magnetopause in the presence of magnetic turbulence 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 Ion transport and Lévy random walk across the magnetopause in the presence of magnetic turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ion transport and Lévy random walk across the magnetopause in the presence of magnetic turbulence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1091111