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PAMELA's measurements of geomagnetically trapped and albedo protons
- Publication Year :
- 2015
- Publisher :
- arXiv, 2015.
-
Abstract
- Data from the PAMELA satellite experiment were used to perform a detailed measurement of under-cutoff protons at low Earth orbits. On the basis of a trajectory tracing approach using a realistic description of the magnetosphere, protons were classified into geomagnetically trapped and re-entrant albedo. The former include stably-trapped protons in the South Atlantic Anomaly, which were analyzed in the framework of the adiabatic theory, investigating energy spectra, spatial and angular distributions; results were compared with the predictions of the AP8 and the PSB97 empirical trapped models. The albedo protons were classified into quasi-trapped, concentrating in the magnetic equatorial region, and un-trapped, spreading over all latitudes and including both short-lived (precipitating) and long-lived (pseudo-trapped) components. Features of the penumbra region around the geomagnetic cutoff were investigated as well. PAMELA observations significantly improve the characterization of the high energy proton populations in near Earth orbits.<br />Comment: Conference: The 34th International Cosmic Ray Conference (ICRC2015), 30 July - 6 August, 2015, The Hague, The Netherlands, Volume: PoS(ICRC2015)288
- Subjects :
- Earth and Planetary Astrophysics (astro-ph.EP)
Physics - Space Physics
Physics::Space Physics
FOS: Physical sciences
Astrophysics::Earth and Planetary Astrophysics
Physics::Atmospheric and Oceanic Physics
Space Physics (physics.space-ph)
Astrophysics - Earth and Planetary Astrophysics
Physics::Geophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....14e1ccb73bae50dfa6b78c997fd2d3b5
- Full Text :
- https://doi.org/10.48550/arxiv.1511.00543