Physics – High Energy Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf..436l&link_type=abstract
HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi
Physics
High Energy Physics
1
Scientific paper
Precise knowledge of the nuclei component of cosmic rays is needed to describe the cosmic ray production, acceleration and propagation mechanisms in our galaxy. Present measurements suffer from limitations due to short exposure time, intrinsic instrumental limitations and restricted energy range. The AMS-02 experiment is a large acceptance magnetic spectrometer to perform high statistics studies of cosmic rays in space. The detector will operate on the International Space Station for more than three years. AMS-02 will measure precisely the cosmic ray fluxes of individual nuclei and isotopes up to Z=26 in the rigidity range from 1 GV to few TV. Such precise measurements will allow verifying the cosmic-ray propagation model through secondary-to-primary ratios as D/p, He3/He4, Be10/Be9, B/C and sub-Fe/Fe. In particular the high accuracy of the Be10/Be9 measurements can improve the understanding of the age of the cosmic-ray confinement and the size of the galactic halo.
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