Magnetospheric particle injection and the upstream ion event of September 5, 1984

Details Magnetospheric particle injection and the upstream ion event of September 5, 1984 Magnetospheric particle injection and the upstream ion event of September 5, 1984

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13.1376k&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Dec. 1986, p. 1376-1379.

Physics

27

Ampte (Satellites), Earth Magnetosphere, Ion Injection, Polar Substorms, Bow Waves, Daytime, Helium Ions, Hydrogen Ions, Leakage, Oxygen Ions

Scientific paper

Energetic particle data from the AMPTE Charge Composition Explorer (CCE) spacecraft in the outer dayside magnetosphere are examined during the period of an upstream ion event observed by the AMPTE Ion Release Module (IRM) spacecraft on September 5, 1984. The CCE data reveal the following: (1) an ion enhancement was observed at about 0040 UT in near coincidence with a substorm onset at about 0035 UT, approximately 15 minutes prior to the onset of the event upstream of the shock; (b) ions of both solar-wind - H(2+) Fe-group - and ionospheric O(+) - origin over a broad energy range (about 20 keV to greater than 1350 keV) were injected at substorm onset; (3) the time evolution of the H(+), He(2+), and O(+) pitch angle distributions markedly differed, with O(+) exhibiting mostly enhancements at off-90-deg angles for the first hour after injection; (4) an enhancement in the Fe-group ions inside the magnetosphere at L = about 6.4 occurred simultaneously with the appearance of an O(+) burst upstream of the shock. The CCE observations, taken together with the simultaneously observed IRM ion event, suggest that a plausible explanation for the appearance of upstream ions is leakage from the magnetosphere into the upstream region, rather than the alternative explanation which requires in situ acceleration of solar wind ions via the Fermi Mechanims.

Affiliated with

Also associated with

No associations

Rating

Magnetospheric particle injection and the upstream ion event of September 5, 1984 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 Magnetospheric particle injection and the upstream ion event of September 5, 1984, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetospheric particle injection and the upstream ion event of September 5, 1984 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1124046