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Trapped proton fluxes at low Earth orbits measured by the PAMELA experiment

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arxiv 1412.1258 v2 pith:R7AUSCHT submitted 2014-12-03 astro-ph.EP astro-ph.HEphysics.space-ph

Trapped proton fluxes at low Earth orbits measured by the PAMELA experiment

classification astro-ph.EP astro-ph.HEphysics.space-ph
keywords earthpamelaparticleradiationtrappedenergyfluxesorbits
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report an accurate measurement of the geomagnetically trapped proton fluxes for kinetic energy above > 70 MeV performed by the PAMELA mission at low Earth orbits (350-610 km). Data were analyzed in the frame of the adiabatic theory of charged particle motion in the geomagnetic field. Flux properties were investigated in detail, providing a full characterization of the particle radiation in the South Atlantic Anomaly region, including locations, energy spectra and pitch angle distributions. PAMELA results significantly improve the description of the Earth's radiation environment at low altitudes placing important constraints on the trapping and interaction processes, and can be used to validate current trapped particle radiation models.

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