Open AccessProtons with kinetic energy E > 70 MeV trapped in the Earth's radiation belts
Author(s) -
Fiandrini E.,
Esposito G.,
Bertucci B.,
Alpat B.,
Ambrosi G.,
Battiston R.,
Burger W. J.,
Caraffini D.,
Di Masso L.,
Dinu N.,
Ionica M.,
Ionica R.,
Pauluzzi M.,
Menichelli M.,
Zuccon P.
Publication year - 2004
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2004ja010394
Subject(s) - south atlantic anomaly , van allen radiation belt , physics , kinetic energy , population , proton , range (aeronautics) , adiabatic process , anomaly (physics) , latitude , flux (metallurgy) , atomic physics , magnetosphere , nuclear physics , materials science , astronomy , plasma , demography , quantum mechanics , sociology , composite material , thermodynamics , condensed matter physics , metallurgy
Accurate measurements of under cutoff proton fluxes in the energy range 0.07–9.1 GeV have been performed with the Alpha Magnetic Spectrometer (AMS) at altitudes of 370–390 km in the geographic latitude interval ±51.7°. A clear transition from a Stably Trapped population typical of the Inner Van Allen belts, in the region of the South Atlantic Anomaly (SAA), to a Quasi‐Trapped population in the regions underneath the Van Allen belts outside the SAA is observed. The flux maps as a function of the canonical adiabatic variables L, α o , and energy E are presented and discussed.