Title: Recent Results from the AMS experiment on the International Space Station
Speaker: Mercedes Paniccia, University of Geneva, Switzerland
Abstract: The Alpha Magnetic Spectrometer (AMS) is a powerful particle’s detector operating on the International Space Station since May 2011 to produce a complete inventory of charged particles and nuclei in cosmic rays of energy from the GeV to few TeVs. Its physics goals are the study of cosmic-ray properties, the indirect search for Dark Matter and direct searches for primordial antimatter and exotic forms of matter. Thanks to its large acceptance, the built-in redundant systems, the thorough pre-flight calibration at CERN particle’s beam, the in-flight calibration, and its long duration mission, AMS is providing cosmic-ray spectra with the unprecedented accuracy of few percent. So far, AMS has collected more than 250 billion cosmic-ray events and has produced precision measurements of the spectra of cosmic-ray electrons, positrons, protons, antiprotons, and nuclei from helium to silicon, sulfur, and iron, H, He and Li isotopes, and time-resolved spectra of electrons, positrons, protons, and light nuclei. The percent precision of the AMS results is revealing unexpected features in cosmic-ray spectra that challenge the current cosmic-ray models. In this talk, I will present the latest AMS results on cosmic-ray nuclei spectra, and on the isotopic composition of light nuclei, showing how they are advancing our understanding of cosmic-ray origin and propagation in the Galaxy. I will conclude with prospects on data analysis and progress on the detector upgrade.
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