Directional dark matter searches with CYGNO experiment.

The CYGNO experiment aims to exploit the optical readout approach of multiple Gas Electron Multipliers (GEM) structures in large volume TPCs for the study of rare events as interaction of low-mass (few GeV) Dark Matter (DM) or solar neutrinos. The TPC volume is filled with an He:$CF_{4}$ gas mixture at atmospheric pressure. The photons produced in the multiplication process are read out by sCMOS sensors, which guarantees a high read granularity, a high sensitivity and a low noise level. The drift time of ionization is measured by PMTs in order to obtain the coordinate perpendicular to the camera plane. The combined use of high-granularity sCMOS cameras and fast light sensors allows the reconstruction of the 3D direction of the tracks, offering good energy resolution and very high sensitivity in the few keV energy range. A detector sensitive to the incoming particle direction, in case of DM discovery, will be important in order to study its properties. The CYGNO experiment goal is to build and to operate a $1 {m^{3}}$ demonstrator underground at the Gran Sasso National Laboratories (LNGS) aiming at a larger scale apparatus ({30 {m^{3}}\mbox$--$100 ${m^{3}}$) at a later stage.