Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.u13a0042f&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #U13A-0042
Physics
7807 Charged Particle Motion And Acceleration, 7845 Particle Acceleration, 7867 Wave/Particle Interactions (2483, 6984), 7984 Space Radiation Environment
Scientific paper
Los Alamos has been flying energetic particle detectors on the GPS constellation for two solar cycles. The current instrument (CXD, Combined X-ray Dosimeter) has now been deployed on 9 GPS spacecraft and this constellation is returning unprecedented high spatial resolution data of the outer radiation belts from L=4 outward, for energies > 100keV. We present here combined data from this constellation covering every 0.2 L-bin from L=4 to L=8 with a time resolution of better than 30 min. These data show fast, global changes of the outer radiation belt with loss events as fast as out data time resolution, across all observed L and all observed energies, even during relatively quiet time periods. These observations are not consistent with current ideas on energetic electron loss (EMIC scattering, magnetopause shadowing, outward diffusion). Combining our observations with predicted plasmapause location further shows evidence of particle acceleration in regions inside the plasmapause, which conflicts with current ideas of energization by whistler mode waves - which occur outside the plasmapause.
Cayton Thomas E.
Friedel Reiner H.
Varotsou Athina
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