Generation of energetic proton shells during substorms

Details Generation of energetic proton shells during substorms Generation of energetic proton shells during substorms

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.1585d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Feb. 1, 1991, p. 1585-1599.

Physics

12

Geomagnetic Tail, Hydrogen Ions, Particle Trajectories, Polar Substorms, Proton Precipitation, Computerized Simulation, Polarization (Charge Separation), Proton Density (Concentration)

Scientific paper

The circulation of the terrestrial polar wind during dynamical reconfigurations of the geomagnetic field is systematically examined by means of three-dimensional single-particle codes. The simulations clearly illustrate the convection surge accompanying the development of substorms, displaying an overall earthward compression of the H(+) populations. Among these, a dense and low-energy core can be identified at close L shells, which appears as a persistent feature during the dipolarization process. Tailward of these inner regions, the simulations demonstrate a pileup of protons initiated in the mid-tail which experience intense accelerations and pitch angle diffusion owing to the transient breaking of their adiabatic invariants. Most notably, a detailed analysis of the trajectory results reveals a sharp earthward boundary for these newly created energetic H(+), which corresponds to the postdipolarization image of the ion adiabatic threshold in the geomagnetic tail. Further nonadiabatic considerations suggest that this mechanism which supports the 'substorm injection boundary' concept depends upon particle mass per charge and may consequently organize distinct ion layers at the inner edge of the plasma sheet.

Affiliated with

Also associated with

No associations

Rating

Generation of energetic proton shells during substorms 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 Generation of energetic proton shells during substorms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Generation of energetic proton shells during substorms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1317624