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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.