Charge determination of nuclei with the AMS-02 silicon tracker

B. Alpat, G. Ambrosi, Ph Azzarello, R. Battiston, P. Bene, B. Bertucci, S. Bizzaglia, M. Bizzarri, S. Blasko, M. Bourquin, Ph Bouvier, W. J. Burger, M. Capell, C. Cecchi, Y. H. Chang, E. Cortina, N. Dinu, G. Esposito, E. Fiandrini, D. HaasH. Hakobyan, M. Ionica, R. Ionica, A. Kounine, V. Koutsenko, A. Lebedev, C. Lechanoine-Leluc, C. H. Lin, F. Masciocchi, M. Menichelli, S. Natale, M. Paniccia, A. Papi, M. Pauluzzi, E. Perrin, M. Pohl, D. Rapin, J. P. Richeux, W. Wallraff, M. Willenbrock, P. Zuccon

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


The silicon tracker of the AMS-02 detector measures the trajectory in three dimensions of electrons, protons and nuclei to high precision in a dipole magnetic field and thus measures their rigidity (momentum over charge) and the sign of their charge. In addition, it measures the specific energy loss of charged particles to determine the charge magnitude. Ladders from the AMS-02 tracker have been exposed to ion beams at CERN and GSI to study their response to nuclei from helium up to the iron group. The longest ladder, 72×496mm2, verified in the tests contains 12 sensors. Good charge resolution is observed up to iron.

Original languageEnglish
Pages (from-to)121-130
Number of pages10
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1
StatePublished - 11 Mar 2005


  • AMS-02
  • Charge of nuclei
  • Energy loss
  • Silicon tracker


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