Decay of ion beam driven acoustic waves into ion holes

Details Decay of ion beam driven acoustic waves into ion holes Decay of ion beam driven acoustic waves into ion holes

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1675g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Sept. 1991, p. 1675-1678.

Computer Science

Sound

17

Ion Beams, Particle Motion, Sound Waves, Space Plasmas, Wave-Particle Interactions, Computerized Simulation, Ion Distribution, Propagation Velocity

Scientific paper

Particle simulation is used to demonstrate the formation of ion holes and parallel potential structures in a background plasma driven by an ion beam. Recent satellite observations suggest that such potential structures which are observed along auroral field lines may form in a cool background ion population. It is shown here that, if such a background is present, ion holes form in the background ion distribution and travel at the acoustic speed in the direction of the ion beam velocity. Linear stability analysis shows this system to be unstable to a beam-acoustic mode involving the beam ions and the background electrons. These beam unstable modes nonlinearly pump the linearly stable ion acoustic modes in the background plasma, seeding the formation of ion holes. The dynamics of these structures is essentially indistinguishable from the evolution of weak double layers seen in previous simulations.

Affiliated with

Also associated with

No associations

Rating

Decay of ion beam driven acoustic waves into ion holes 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 Decay of ion beam driven acoustic waves into ion holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decay of ion beam driven acoustic waves into ion holes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1339708