2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/219314The poster presented the OPERA experiment and the SPL-Fréjus neutrino super beam project. OPERA (1) is an experiment willing to see tau neutrino appearance. The detector is described in section 2 and the expected results are given. Section 3 is devoted to the SPL neutrino super beam (2), which search for $θ\_{13}$. An optimisation of the SPL energy is proposed.High Energy Physics - Experimenttext