A comparison of energetic ions in the plasma depletion layer and the quasi-parallel magnetosheath

Details A comparison of energetic ions in the plasma depletion layer and the quasi-parallel magnetosheath A comparison of energetic ions in the plasma depletion layer and the quasi-parallel magnetosheath

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.5855f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A4, p. 5855-5868

Physics

Geophysics

9

Bow Waves, Energetic Particles, Magnetosheath, Magnetospheric Ion Density, Plasma Density, Shock Waves, Ampte (Satellites), Geophysics, Helium Ions, Hydrogen Ions, Magnetopause, Solar Wind

Scientific paper

Energetic ion spectra measured by the Active Magnetospheric Particle Tracer Explorers/Charge Composition Explorer (AMPTE/CCE) downstream from the Earth's quasi-parallel bow shock (in the quasi-parallel magnetosheath) and in the plasma depletion layer are compared. In the latter region, energetic ions are from a single source, leakage of magnetospheric ions across the magnetopause and into the plasma depletion layer. In the former region, both the magnetospheric source and shock acceleration of the thermal solar wind population at the quasi-parallel shock can contribute to the energetic ion spectra. The relative strengths of these two energetic ion sources are determined through the comparison of spectra from the two regions. It is found that magnetospheric leakage can provide an upper limit of 35% of the total energetic H(+) population in the quasi-parallel magnetosheath near the magnetopause in the energy range from approximately 10 to approximately 80 keV/e and substantially less than this limit for the energetic He(2+) population. The rest of the energetic H(+) population and nearly all of the energetic He(2+) population are accelerated out of the thermal solar wind population through shock acceleration processes. By comparing the energetic and thermal He(2+) and H(+) populations in the quasi-parallel magnetosheath, it is found that the quasi-parallel bow shock is 2 to 3 times more efficient at accelerating He(2+) than H(+). This result is consistent with previous estimates from shock acceleration theory and simulati ons.

Affiliated with

Also associated with

No associations

Rating

A comparison of energetic ions in the plasma depletion layer and the quasi-parallel magnetosheath 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 A comparison of energetic ions in the plasma depletion layer and the quasi-parallel magnetosheath, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A comparison of energetic ions in the plasma depletion layer and the quasi-parallel magnetosheath will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1258341