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  • Performance of the AMS-02 Transition Radiation Detector
    Doetinchem, P v; Fopp, S; Karpinski, W; Kirn, T; Luebelsmeyer, K; Orboeck, J; Schael, S; A Schultz von Dratzig; Schwering, G; Siedenburg, T; Siedling, R; Wallraff, W; Becker, U; Burger, J; Henning, R; Kounine, A; Koutsenko, V; Wyatt, J

    arXiv.org, 08/2006
    Paper

    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.

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