Numerical Investigation of Perpendicular Diffusion of Charged Test Particles in Weak Magnetostatic Slab Turbulence

Details Numerical Investigation of Perpendicular Diffusion of Charged Test Particles in Weak Magnetostatic Slab Turbulence Numerical Investigation of Perpendicular Diffusion of Charged Test Particles in Weak Magnetostatic Slab Turbulence

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...538..192m&link_type=abstract

The Astrophysical Journal, Volume 538, Issue 1, pp. 192-202.

Astronomy and Astrophysics

Astronomy

39

Ism: Cosmic Rays, Diffusion, Magnetohydrodynamics: Mhd, Plasmas, Turbulence

Scientific paper

The perpendicular diffusion of charged test particles in a static representation of low-frequency, weakly turbulent magnetic fields superimposed on a steady background field is investigated with numerical simulations. The magnetic field variation is purely one-dimensional, consistent with an ensemble of field-aligned Alfvén waves in the limit of zero Alfvén speed. The diffusion coefficient κ⊥ obtained from the numerical simulations is compared with Bieber & Matthaeus's recent theory of spatial diffusion, specialized to one-dimensional field geometry, for a number of particle energies/rigidities. It is found that the recent theory provides a better fit to the numerical data for Ωτ>2, where Ω is the particle gyrofrequency and τ is a rigidity-dependent decorrelation time, than does the well-known quasi-linear theory, or field line random walk limit. However, while the Bieber & Matthaeus theory fails to fit the simulation data for Ωτ<1, the theory corresponding to the field line random walk limit exhibits only a 20% error here. Possible reasons for the discrepancy between the theory and simulations are discussed.

Affiliated with

Also associated with

No associations

Rating

Numerical Investigation of Perpendicular Diffusion of Charged Test Particles in Weak Magnetostatic Slab 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 Numerical Investigation of Perpendicular Diffusion of Charged Test Particles in Weak Magnetostatic Slab Turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerical Investigation of Perpendicular Diffusion of Charged Test Particles in Weak Magnetostatic Slab Turbulence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1717777