Speaker
Giovanni Ambrosi
(INFN Perugia)
Description
Eight layers of double sided silicon microstrip sensors embedded in a 0.8 T
magnetic field constitute the core of the AMS-02 apparatus. In each layer,
simultaneous measurements of position and energy loss in silicon are
performed along the particle trajectory. With its high spatial resolution, the
silicon tracker will determine the rigidity (R) and the charge sign of particles
up to several TVs, with a relative resolution ∼ 2.5% at R < 100 GV. The low
noise and wide dynamic range of the silicon readout electronics allow to
exploit the energy loss measurements to determine the particle absolute
charge for nuclei up to Fe. The AMS Tracker construction has been
completed and it will be integrated into the AMS experiment during the
2007. The performance of the silicon detectors observed under various
beam tests will be presented focusing on the spatial resolution and on the
charge separation capability. The performance of the six inner planes,
already integrated in the flight structure, with cosmic rays will also be
presented.
Author
Giovanni Ambrosi
(INFN Perugia)
