The role of proton injection processes in the nonlinear evolution of 'pearls'

Details The role of proton injection processes in the nonlinear evolution of 'pearls' The role of proton injection processes in the nonlinear evolution of 'pearls'

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..165k&link_type=abstract

Planetary and Space Science, vol. 27, Feb. 1979, p. 165-168.

Computer Science

Geomagnetic Pulsations, Ion Cyclotron Radiation, Proton Energy, Wave Packets, Earth Magnetosphere, Magnetic Field Configurations, Plasma Waves

Scientific paper

If there is a constant number of resonant particles in a magnetic flux tube, the amplitudes of excited waves reach a steady state within a time comparable to the characteristic period of nonlinear oscillations. For amplitudes in the range 10-100 milli-gamma and protons in the energy range 10-100 keV, the characteristic period is about 1-10 sec. However, observations of pearl-type geomagnetic pulsations show that the amplitudes of such pulsations increase for a much longer period; for example, pearl amplitude increases monotonically for 5-10 min up to the time of development of sideband instability. The role played by resonant-particle injection in the nonlinear evolution of pearls is emphasized.

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