Simulations of heavy ion heating by electromagnetic ion cyclotron waves driven by proton temperature anisotropies

Details Simulations of heavy ion heating by electromagnetic ion cyclotron waves driven by proton temperature anisotropies Simulations of heavy ion heating by electromagnetic ion cyclotron waves driven by proton temperature anisotropies

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.6459t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, July 1, 1985, p. 6459-6468.

Physics

57

Equatorial Atmosphere, Heavy Ions, Ion Cyclotron Radiation, Plasma Heating, Space Plasmas, Cyclotron Resonance, Daytime, Earth Magnetosphere, Helium Ions, Proton Energy, Simulation

Scientific paper

Heating of heavy ions by the electromagnetic ion cyclotron (EMIC) waves, which are driven by proton temperature anisotropies, is studied by means of hybrid particle simulations. Initially, relaxation of the temperature anisotropies in the proton distribution and isotropic heating of the heavy ions are observed (phase I), followed by substantial perpendicular heating of the heavy ions (phase II). The heavy ions are distinctly gyrophase modulated by the EMIC waves. The isotropic heating in phase I is due to magnetic trapping by the excited proton cyclotron waves. The perpendicular heating in phase II is attributed to cyclotron resonance with the EMIC waves, which becomes possible by means of the preceding heating in phase I. Saturation of the EMIC instability is instead attributed to magnetic trapping of the majority ions: protons. When the proton anisotropy is very large, frequency shift (decrease) of the proton cyclotron waves to less than 1/2 Ohm(p) is observed. The present mechanism is not only relevant to He(+) heating in the dayside equator of the magnetosphere, but it also predicts hot He2(+) ions behind the earth's bow shock.

Affiliated with

Also associated with

No associations

Rating

Simulations of heavy ion heating by electromagnetic ion cyclotron waves driven by proton temperature anisotropies 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 Simulations of heavy ion heating by electromagnetic ion cyclotron waves driven by proton temperature anisotropies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulations of heavy ion heating by electromagnetic ion cyclotron waves driven by proton temperature anisotropies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1232376