Gyrophase-restricted 100 keV-2 MeV ion beams near the foreshock boundary

Details Gyrophase-restricted 100 keV-2 MeV ion beams near the foreshock boundary Gyrophase-restricted 100 keV-2 MeV ion beams near the foreshock boundary

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30tssc5m&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 20, pp. SSC 5-1, CiteID 2049, DOI 10.1029/2003GL017592

Physics

Plasma Physics

3

Interplanetary Physics: Energetic Particles, Heliospheric (7514), Interplanetary Physics: Planetary Bow Shocks, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Space Plasma Physics: Charged Particle Motion And Acceleration, Space Plasma Physics: Shock Waves

Scientific paper

We report on gyrophase-restricted ion beams with energies extending from ~100 keV up to ~2 MeV, observed by Wind in the Earth's distant (~65 RE) foreshock. The ion gyrophases seen were nearly constant during periods when the distance to the shock contact point could be expected to vary by several RE, when there was no significant wave activity. At times the distributions had two peaks ~180° apart in gyrophase. These were consistent with a remotely-sensed energetic ion foreshock region having a thickness <2 gyroradii (~1.5 RE for 0.5 MeV protons with pitch-angle α = 30°). In this picture, gaps in phase space would correspond to particles with guiding centers outside of the energetic foreshock region. Similar observations over a decade of energies (100 keV-2 MeV) suggest that the region thickness scales with gyroradius. According to this interpretation, we have determined a rough range of geometries for which energetic particle production is favored. (Eg., θBn ~70-80° for 500 keV ions with α = 30°.)

Affiliated with

Also associated with

No associations

Rating

Gyrophase-restricted 100 keV-2 MeV ion beams near the foreshock boundary 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 Gyrophase-restricted 100 keV-2 MeV ion beams near the foreshock boundary, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gyrophase-restricted 100 keV-2 MeV ion beams near the foreshock boundary will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-918913