Relatore
Summary
AMS-02 is an astroparticle experiment that will operate on board of the ISS for a
period of about three years. The main scientific goals of the experiment are the
search for antimatter and dark matter, the high precision measurement of charged
cosmic ray spectra and fluxes and the study of gamma rays, in the GeV to TeV energy
range. In AMS-02 the Electromagnetic Calorimeter (ECAL) is required to measure e+,
e-
and gamma spectra and to discriminate electromagnetic showers from hadronic
cascades.
To fulfill these requirements ECAL is based on a lead/scintillating fiber sandwich,
providing a 3D imaging reconstruction of the showers. The electronics equipping the
detector, with low noise and challenging dynamic range readout, was designed
following stringent requirements on mechanical and thermal stability, power
consumption, radiation hardness and double redundancy. The full system had
successfully gone through the space qualification tests. the ECAL Flight Model has
been calibrated during Summer 2007 in a test beam at CERN, using 6 to 250 GeV
electron and proton beams. Results on the measurements of ECAL parameters and
performance are reported.
