Author/Authors :
Barbarito، نويسنده , , E. and Bellotti، نويسنده , , R. and Cafagna، نويسنده , , F. and Castellano، نويسنده , , M. and Circella، نويسنده , , M. and De Cataldo، نويسنده , , G. and De Marzo، نويسنده , , C. and Fusco، نويسنده , , P. and Giglietto، نويسنده , , N. and Mongelli، نويسنده , , M. and Marangelli، نويسنده , , B. and Perchiazzi، نويسنده , , M. and Rainٍ، نويسنده , , A. and Sacchetti، نويسنده , , A. and Spinelli، نويسنده , , P.، نويسنده ,
Abstract :
We have built and tested a transition radiation detector of about 76 × 80 cm2 active surface to discriminate positrons from protons in an experiment performed on a balloon flight to search for primordial antimatter. The TRD is made of ten modules each consisting of a carbon fiber radiator followed by a multiwire proportional chamber. In order to achieve a proton-electron rejection factor of the order of 10−3 with a strict limitation on power consumption to about 40 mW per chamber channel, as required by experimental constraints, we have developed a low power consumption “cluster counting” electronics. Different analysis procedures of calibration data are shown. In addition, comparisons of the performances of this detector are also made with a previous similar prototype equipped with standard fast electronics and similar detectors from other authors.
