Physics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995nimpa.357..588b&link_type=abstract
Nuclear Instruments and Methods in Physics Research Section A, v. 357, p. 588-600
Physics
11
Scientific paper
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.
Barbarito E.
Bellotti Roberto
Cafagna F.
Castellano Marco
Circella Marco
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