The AMS02 Silicon Tracker First Year on ISS

The AMS-02 Silicon Tracker First Year on ISS in Space Divic Rapin, DPNC, Université de Genève on behalf of the AMS-Tracker Collaboration 7 m 2 of double sided microstrip detectors arranged in 9 planes AMS-02 Ladders 192 tracker modules with 7 to 15 sensors 196’ 608 channels Front-end equipped with high dynamic range VAs Upper tracker (1 layer) Inner tracker (7 layers) Lower tracker Daisy chaining (1 layer) Pitch p-side: Y (bend σth: 8 μm ) - 27. 5 μm (110 read-out) Pitch n-side: X (non-bend) - 104 μm (208 read-out) AMS-02 SC Magnet Configuration Mechanically pumped two phases CO 2 proposed by B. Verlaat in 2000. J. van Es et al. , IAC-09. C 2. 7. 1, 2009 . . . to evaporators (cooling loops). . . Rigidity resolution % AMS-02 Permanent Magnet Configuration Test Beam Result 400 Ge. V protons . . . and finally to external radiators. Inner and Lower Tracker Temperature Control and Monitoring GMT 06 h 00 -12 h 00, May 13, 2012 Pump Tracker Environmental Conditions and Stability TTCS test and commissioning Cooling loops (evaporators) Hottest location of inner. . . tracker (front-end electronics) Layer 9: Bending Plane Residual (cm) Proton Rigidity (GV) One orbit set point 0°C Performances with Test Beam and Atmospheric Muons center front-ends In Flight Performances Global Cluster Efficiency TTCS: Tracker cooling Heat from front-end electronics is conducted through thermal bars. . . Ion Charge ID by d. E/dx On-line Calibration Monitoring 1 MIP = 30 ADC Frontier Detectors for Frontier Physics 20 -26 May 2012 La Biodola, Isola d'Elba, Italy