We have built and tested a transition radiation detector of about 76 X 80 cm(2) 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.
A transition radiation detector for positron identification in a balloon-borne particle astrophysics experiment / Barbarito, E.; Bellotti, R.; Cafagna, F.; Castellano, M.; Circella, M.; de Cataldo, G.; de Marzo, C.; Fusco, P.; Giglietto, N.; Mongelli, M.; Marangelli, B.; Perchiazzi, M.; Rainò, A.; Sacchetti, A.; Spinelli, P.. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 357:2-3(1995), pp. 588-600. [10.1016/0168-9002(95)00029-1]
A transition radiation detector for positron identification in a balloon-borne particle astrophysics experiment
Castellano, M.;Giglietto, N.;
1995-01-01
Abstract
We have built and tested a transition radiation detector of about 76 X 80 cm(2) 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
