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Silicon Tracking System (STS)


Silicon Tracking System in Dipole Magnet - longitudinal cut

Task: 

Main detector in the CBM experiment for charged particle measurement including momentum determination.


Detector features:

  • pile-up free track point determination in high-rate collision environment:  105 - 107/s (A+A), up to 109/s (p+A)
  • physics aperture: 2.5° ≤  Θ ≤ 25°, 0.3 m ≤ z ≤ 1.0 m
  • 8 tracking stations, volume 2 m3, area 4 m2
  • 896 detector modules in various lengths
           • 896 double-sided microstrip sensors        
           • radiation tolerance: up to 1014 n cm-2 (1 MeV equivalent)       
           • ~ 1.8 million read-out channels       
           • ~ 16 000 r/o ASICs “STS-XYTER”       
           • ultra-thin r/o cables  (5÷50 cm long)
  • 106 detector ladders with 8 or 10 modules
  • hit spatial resolution of ≈ 25 µm
  • self-triggering front-end electronics
  • time-stamp resolution  ≈ 5 ns
  • power dissipation: ~40 kW  (CO2 cooling)
  • thermal enclosure: sensors at  T = -5° C
  • material : ≈ 0.3 % – 1% X0 per station
  • momentum resolution:  dp/p ≈ 1.8% (p > 1 GeV/c, 1 Tm field)

Integration concept:


Project teams:



Contacts:


Hans-Rudolf Schmidt

Project leader

Phone:
+49-6159-71-1623 (GSI)
+49-7071-29-74451 (Eberhard Karls Universitaet Tübingen)
Email:
H.R.Schmidt(at)gsi.de
hans-rudolf.schmidt(at)uni-tuebingen.de


Johann Heuser

Project Technical Coordinator

Office: GSI KBW 4.003
Phone: +49-6159-71-2717
Email: J.Heuser(at)gsi.de


 
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