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  • Baracchini, E; Bedogni, R; Bellini, F; Benussi, L; Bianco, S; Capoccia, C; Caponero, M; Cavoto, G; Costa, I A; E Di Marco; D'Imperio, G; Iacoangeli, F; Maccarone, G; Marafini, M; Mazzitelli, G; Messina, A; Orlandi, A; Paoletti, E; Passamonti, L; Pelosi, A; Petrucci, F; Piccolo, D; Pierluigi, D; Pinci, D; Renga, F; Russo, A; Saviano, G; Tomassini, S

    arXiv.org, 01/2020
    Paper

    The aim of the CYGNO project is the construction and operation of a 1~m\(^3\) gas TPC for directional dark matter searches and coherent neutrino scattering measurements, as a prototype toward the 100-1000~m\(^3\) (0.15-1.5 tons) CYGNUS network of underground experiments. In such a TPC, electrons produced by dark-matter- or neutrino-induced nuclear recoils will drift toward and will be multiplied by a three-layer GEM structure, and the light produced in the avalanche processes will be readout by a sCMOS camera, providing a 2D image of the event with a resolution of a few hundred micrometers. Photomultipliers will also provide a simultaneous fast readout of the time profile of the light production, giving information about the third coordinate and hence allowing a 3D reconstruction of the event, from which the direction of the nuclear recoil and consequently the direction of the incoming particle can be inferred. Such a detailed reconstruction of the event topology will also allow a pure and efficient signal to background discrimination. These two features are the key to reach and overcome the solar neutrino background that will ultimately limit non-directional dark matter searches.