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arXiv · 1408.4246

New Preshower detector for DIRAC Experiment

M. Pentia·S. Aogaki·D. Dumitriu·D. Fluerasu·M. Gugiu·V. Yazkov
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Abstract

The Preshower (PSh) detector is a component of the DIRAC setup. It is designed to improve rejection efficiency of e-e+ pairs background in the ππ and Kπ pair measurement. To increase the overall efficiency, a new two-layer structure scintillator Preshower detector has been realized in the region where the Nitrogen Cherenkov detector has been shortened to introduce new detectors. The new Preshower-Cherenkov combination ensures the electron rejection efficiency better than 99.9% in momentum region 1-7 GeV/c.

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M. Pentia, S. Aogaki, D. Dumitriu, D. Fluerasu, M. Gugiu, V. Yazkov. 2014-08-19. New Preshower detector for DIRAC Experiment. https://doi.org/10.1016/j.nima.2015.06.003

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