Reentrant albedo proton fluxes measured by the PAMELA experiment
2015 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 120, no 5, 3728-3738 p.Article in journal (Refereed) Published
We present a precise measurement of downward going albedo proton fluxes for kinetic energy above similar to 70 MeV performed by the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) experiment at an altitude between 350 and 610 km. On the basis of a trajectory tracing simulation, the analyzed protons were classified into quasi-trapped, concentrating in the magnetic equatorial region, and untrapped spreading over all latitudes, including both short-lived (precipitating) and long-lived (pseudotrapped) components. In addition, features of the penumbra region around the geomagnetic cutoff were investigated in detail. PAMELA results significantly improve the characterization of the high-energy albedo proton populations at low-Earth orbits.
Place, publisher, year, edition, pages
2015. Vol. 120, no 5, 3728-3738 p.
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:kth:diva-171912DOI: 10.1002/2015JA021019ISI: 000357869600033ScopusID: 2-s2.0-84934937728OAI: oai:DiVA.org:kth-171912DiVA: diva2:845357
FunderSwedish National Space BoardSwedish Research Council
QC 201508112015-08-112015-08-102015-08-11Bibliographically approved