The Transition Radiation Detector of the AMS-2 Experiment

The AMS magnetic spectrometer will be installed on the International Space Station ISS to measure the properties of cosmic rays in the range of 1 to 1000 GeV during a mission of three years. A Transition Radiation Detector is used in combination with an electromagnetic calorimeter to reach a rejection of 10^-6 protons against positrons up to an energy of 300 GeV. This allows to search for cosmic cold dark matter through their decay products.