Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm23c..06y&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM23C-06
Physics
2716 Energetic Particles: Precipitating, 2720 Energetic Particles: Trapped, 2730 Magnetosphere: Inner, 2774 Radiation Belts
Scientific paper
Magnetic field line curvature (FLC) induced pitch angle scattering may be an important storm-time detrapping mechanism for energetic ions near the boundaries of the ion radiation belts. During magnetic storms the intensified ring current distorts the magnetic field causing increased curvature of the magnetic field lines. In regions where the curvature becomes strong enough the magnetic moments of the particle gyro-orbits are no longer conserved and the particles diffuse in pitch angle until they are captured by the Earth's atmosphere. To study the importance of FLC detrapping we simulate the decay of a temporarily trapped population seen in the CRRES PROTEL data. Because FLC pitch angle scattering is sensitive to the field line radius of curvature we completed multiple simulations of the decay using different Tsyganenko magnetic field models.
Anderson Benjamin J.
Denton Richard E.
Hudson Mary K.
Young S. L.
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