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Développements logiciels autour du multidétecteur TAPS: gestion en ligne des données au GANIL; reconnaissance de mésons a l'aide de réseaux connexionnistes

Abstract : The photon multidetector system TAPS, a European collaboration, was installed for the second series of experiments at GANIL in the fall of 1992. It was used in conjunction with a multidetector for charged particles and the high resolution spectrometer SPEG. This experimental set-up is described. A dedicated software package, written in the PAW environment, for the online control and analysis of data has been developed and is described in detail. One aspect of the TAPS experimental program involves the detection of neutral mesons via two-photon decay. The identification by this decay channel is not trivial due to the so-called combinatorial background-the generation of photon pairs not associated with a meson decay. A method based on a neural network has been developed in order to aid in the extraction of the meson signal. The method is based on that of Hopfield and has been modified to incorporate the self-connection of cells. Our network is thus well suited to solve optimization problems where the initial state of the system represents the data constituting the problem. The performance of the network is presented using simulations and it is demonstrated that the signal-to-noise ratio can be improved given constraints on the solid angle of the detector and the correct identification of the photons.
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http://hal.in2p3.fr/in2p3-00010197
Contributor : Michel Lion <>
Submitted on : Thursday, February 12, 2015 - 2:30:21 PM
Last modification on : Monday, November 16, 2020 - 2:48:06 PM
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  • HAL Id : in2p3-00010197, version 1

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F. Lefevre. Développements logiciels autour du multidétecteur TAPS: gestion en ligne des données au GANIL; reconnaissance de mésons a l'aide de réseaux connexionnistes. Instrumentations et Détecteurs [physics.ins-det]. Université de Caen, 1993. Français. ⟨in2p3-00010197⟩

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