This work proposes to evaluate the effect of digital filters when applied to images acquired by the ORANGE prototype of the Cygno experiment. A preliminary analysis is presented in order to understand if filtering techniques can produce results that justify investing efforts in the pre-processing stage of those images. Such images come from a camera sensor based on CMOS technology installed in an appropriate gas detector. To perform the proposed work, a simulation environment was created and used to evaluate some of the classical filtering techniques known in the literature. The results showed that the signalto-noise ratio of the images can be considerably improved, which may help in subsequent processing steps such as clustering and particles identification.
The Neutrinos Angra Experiment has completed a major step by finishing the commissioning of the detector and the data acquisition system at the experimental site located in the Angra dos Reis nuclear power plant. The experiment, consisting of a water-based detector and associated electronics, was designed with the goal of detecting the electron antineutrinos produced by the nuclear reactor. The detection is possible due to the Inverse Beta Decay, where the final products in the water are photons in the UV-to-visible range of the spectrum. The assembled detector comprises three active volumes filled with water: (i) a cubic detector (Target) for electron antineutrinos, covered by 32 8-inch photomultiplier tubes (PMTs), (ii) a lateral layer surrounding the Target (Lateral veto) equipped with 4 PMTs and (iii) a third volume covering the top of both (Top veto), also equipped with 4 PMTs. In the present document the main features of the detector assembly as well as the integration of the readout electronics on-site are reported. Finally, some operational characteristics are shown based on analysis of the first measurements performed with the fully working detector.
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