Geomagnetically trapped anomalous cosmic rays

Details Geomagnetically trapped anomalous cosmic rays Geomagnetically trapped anomalous cosmic rays

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...100.9503s&link_type=abstract

Journal of Geophysical Research, Volume 100, Issue A6, p. 9503-9518

Physics

35

Interplanetary Physics: Cosmic Rays, Interplanetary Physics: Interstellar Gas, Magnetospheric Physics: Energetic Particles, Trapped, Magnetospheric Physics: Magnetosphere-Inner

Scientific paper

Since its launch in July 1992, the polar-orbiting satellite SAMPEX has been collecting data on geomagnetically trapped heavy ions, predominantly O, N, and Ne, at energies >15 MeV/nucleon and in a narrow L shell range near L=2. Their location, elemental composition, energy spectra, pitch angle distribution, and time variations all support the theory that these particles originated as singly ionized interplanetary anomalous cosmic rays that were stripped of electrons in the Earth's upper atmosphere and subsequently trapped. The O are observed primarily at pitch angles outside the atmospheric loss cones, consistent with a trapped population, and their distribution there is nearly isotropic. The abundances relative to O of the N, possibly Ne, and especially C are lower than the corresponding interplanetary values, which may be indicative of the trapping efficiencies. The distributions of trapped N, O, and Ne in energy and L shell suggest that most of the ions observed at the SAMPEX altitude of ~600 km are not fully stripped when initially trapped. A comparison of the trapped intensity with the much lower interplanetary intensity of anomalous cosmic rays provides model-dependent estimates of the product of the trapping probability and the average trapped particle lifetime against ionization losses in the residual atmosphere for particles that mirror near the SAMPEX altitude.

Affiliated with

Also associated with

No associations

Rating

Geomagnetically trapped anomalous cosmic rays 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 Geomagnetically trapped anomalous cosmic rays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geomagnetically trapped anomalous cosmic rays will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-755356