On the excitation of cyclotron harmonic waves by newborn heavy ions

Details On the excitation of cyclotron harmonic waves by newborn heavy ions On the excitation of cyclotron harmonic waves by newborn heavy ions

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.5467b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, May 1, 1989, p. 5467-5473.

Physics

15

Halley'S Comet, Harmonic Excitation, Harmonic Radiation, Heavy Ions, Ion Cyclotron Radiation, Bow Waves, Doppler Effect, Giotto Mission, Hydrogen Plasma, Polarization (Waves), Propagation Modes

Scientific paper

Wave measurements in planetary foreshocks and cometary environments show the sporadic occurrence of magnetic spectra with harmonic structure related to ion-cyclotron frequencies. Dilute populations of anisotropic and/or drifting charged particles can excite obliquely propagating modes with spacecraft frequencies close to the observed harmonics. Previous analyses of this generation mechanism are extended to drifting and nondrifting loss-cone-type distributions of heavy ions in a dense hydrogen magnetoplasma, characterizing the complex (real frequency and growth rate) dispersion, polarization, and compressibility of the unstable cyclotron harmonic waves. Solution of the full kinetic dispersion equation shows that it is possible to attain harmonic excitation, both in the drifting and nondrifting regimes. However, the bandwidth inherent to frequency Doppler shifts of obliquely propagating waves might preclude the observation of spectral structure in the spacecraft frame. The Giotto observations in the upstream region of comet Halley provide a reference to discuss the results.

Affiliated with

Also associated with

No associations

Rating

On the excitation of cyclotron harmonic waves by newborn heavy ions 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 On the excitation of cyclotron harmonic waves by newborn heavy ions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the excitation of cyclotron harmonic waves by newborn heavy ions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1874710