Formation of He2+ shell-like distributions downstream of the Earth's bow shock

Details Formation of He2+ shell-like distributions downstream of the Earth's bow shock Formation of He2+ shell-like distributions downstream of the Earth's bow shock

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3203111l&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 3, CiteID L03111

Physics

Plasma Physics

10

Space Plasma Physics: Kinetic Waves And Instabilities, Space Plasma Physics: Shock Waves (4455), Space Plasma Physics: Wave/Particle Interactions (2483, 6984)

Scientific paper

When the incident solar wind He2+ and H+ distributions cross the electrostatic potential at the shock, they are decelerated differentially due to their different charge- to-mass ratios. This differential slowing will produce a He2+ ring-beam distribution immediately downstream from a quasi-perpendicular shock. In this letter, we perform one-dimensional (1D) hybrid simulations and investigate the evolution of the He2+ ring-beam distribution in magnetized plasma. The plasma is composed of three components: H+, He2+ and electrons, where H+ has a velocity distribution with large perpendicular temperature anisotropy. It is shown that both the He2+ ring-beam distribution and H+ distribution with large perpendicular temperature anisotropy can excite ion cyclotron waves with propagation direction parallel to the ambient magnetic field, and then the waves pitch-angle scatter the He2+ ions. However, only the ion cyclotron waves excited by the He2+ ring-beam distribution can transform He2+ into shell-like distribution. The results can explain the He2+ shell-like distributions downstream of the Earth's bow shock, which have already been observed with the AMPTE/CCE and ISEE spacecraft.

Affiliated with

Also associated with

No associations

Rating

Formation of He2+ shell-like distributions downstream of the Earth's bow shock 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 Formation of He2+ shell-like distributions downstream of the Earth's bow shock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of He2+ shell-like distributions downstream of the Earth's bow shock will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1359121