Quasi-linear velocity space diffusion of heavy cometary pickup ions on bispherical diffusion characteristics

Details Quasi-linear velocity space diffusion of heavy cometary pickup ions on bispherical diffusion characteristics Quasi-linear velocity space diffusion of heavy cometary pickup ions on bispherical diffusion characteristics

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9719163h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A12, p. 19,163-19,174.

Physics

18

Halley'S Comet, Heavy Ions, Ionic Diffusion, Magnetohydrodynamic Waves, Solar Wind, Transport Properties, Comet Nuclei, Giotto Mission, Magnetohydrodynamic Flow, Spacecraft Trajectories, Wave Scattering

Scientific paper

We consider an ion transport equation describing the source, convection, adiabatic acceleration, and quasi-linear velocity diffusion of cometary pickup ions. The equation is solved numerically along solar wind plasma flow lines for the environment of Comet Halley, to obtain distributions at positions on the Giotto spacecraft trajectory which may be compared with observations. We obtain full two-dimensional (pitch angle and velocity) numerical distributions which show pitch angle scattering about the wave scattering centers at +/- V(A), where V(A) is the Alfven wave speed in the solar wind frame. Peak ion phase-space densities approximately follow the bispherical shell geometry. The energy distributions F(v) agree well with Giotto observations at lower v, but in the high-energy tail there is evidence possibly for the first-order Fermi acceleration mechanism taking place in the Comet Halley foreshock region.

Affiliated with

Also associated with

No associations

Rating

Quasi-linear velocity space diffusion of heavy cometary pickup ions on bispherical diffusion characteristics 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 Quasi-linear velocity space diffusion of heavy cometary pickup ions on bispherical diffusion characteristics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quasi-linear velocity space diffusion of heavy cometary pickup ions on bispherical diffusion characteristics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1115677