Physics
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33...39k&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 33, Jan. 1985, p. 39-44.
Physics
Energetic Particles, Geomagnetism, Inner Radiation Belt, Magnetic Storms, Proton Belts, Low Altitude, Particle Motion, Proton Energy
Scientific paper
The irreversible changes of the intensity of trapped protons with energy above 1 MeV in the earth's magnetosphere near the outer boundary of trapping are observed after moderate geomagnetic storms on the low-altitude polar-orbiting satellite Intercosmos-17. These changes are interpreted in terms of nonadiabatical effects of proton motion in the disturbed geomagnetic field (assuming D st variation) which affects the conditions for stable trapping of protons during the storm. The decrease of proton intensity is due to an adiabatic decrease of energy, an increase of mirror-point altitude and nonadiabatic scattering and losses. The interaction of two types of particle motion-gyrorotation and the 'bounce' motion, which leads to the instability of motion, is assumed. The importance of nonadiabatical losses of trapped protons with low equatorial pitch angles for changes near the proton boundary is pointed out.
Ilin V. D.
Kudela Karel
Kuznetsov Sergei N.
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