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The temporal evolution of 3–9 MeV/nucleon He flux trapped in the magnetosphere
Author(s) -
Pugacheva G. I.,
Gusev A. A.,
Martin I. M.,
Spjeldvik W. N.,
Kohno T.
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl02689
Subject(s) - physics , magnetosphere , flux (metallurgy) , nucleon , van allen probes , range (aeronautics) , satellite , atomic physics , nuclear physics , ion , van allen radiation belt , computational physics , astrophysics , plasma , astronomy , materials science , quantum mechanics , metallurgy , composite material
Results of measurements of the absolute values and long term temporal evolution of the spatial distribution of trapped He ion fluxes of 3.2–9.2 MeV/nucleon energy at L <4 obtained by the OHZORA satellite are reported. The annually averaged radial profile exhibits one persistently present peak at L =1.3–1.5 as well as very significant transient trapped fluxes at L =1.4–4.0 during the period 1984–1986. Together the absolute values of the fluxes measured by OHZORA and S72‐1, SAMPEX, and CRRES spacecrafts may approximately be described by a power spectrum with index of −8.0±1.0 at L =1.9–2.3 within the energy range of 3–100 MeV/nucleon .