Computer Science – Numerical Analysis
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31..859m&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 31, Aug. 1983, p. 859-863.
Computer Science
Numerical Analysis
12
Earth Magnetosphere, Geomagnetic Micropulsations, Magnetohydrodynamic Waves, Wave Amplification, Wave Propagation, Magnetic Field Configurations, Numerical Analysis, Plasmapause, Wave Diffraction
Scientific paper
As currently understood, Pc1 micropulsation 'pearls' are Alfven wave trains that bounce between magnetic conjugate points along geomagnetic field lines, amplified by the cyclotron instability of hot anisotropic ring current protons during each passage through the near-equatorial region. Pearl propagation and amplification are presently analyzed, taking wave train diffusion in the k-space into account. The competition between instability-induced amplification and diffusion is found to determine the magnetospheric parameter values at which pearls may appear. Diffusion is noted to be especially large under conditions of a thin plasmapause, where pearl generation becomes virtually impossible.
Mazur Vitalii A.
Potapov Alexandre S.
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