Performance of the AMS-02 Transition Radiation Detector
  For cosmic particle spectroscopy on the International Space Station the AMS experiment will be equipped with a Transition Radiation Detector (TRD) to improve particle identification. The TRD has 20 layers of fleece radiator with Xe/CO2 proportional mode straw tube chambers. They are supported in a conically shaped octagon structure made of CFC-Al-honeycomb. For low power consumption VA analog multiplexers are used as front-end readout. A 20 layer prototype built from final design components has achieved proton rejections from 100 to 2000 at 90% electron efficiency for proton beam energies up to 250 GeV with cluster counting, likelihood and neural net selection algorithms. 
P. v.Doetinchem (1), S. Fopp (1), W. Karpinski (1), T. Kirn (1), K.   Luebelsmeyer (1), J. Orboeck (1), S. Schael (1), A. Sc...