2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203144The WASA 4pi multidetector system, aimed at investigating light meson production in light ion collisions and eta meson rare decays at the CELSIUS storage ring in Uppsala is presented. A detailed description of the design, together with the anticipated and achieved performance parameters are given.25 pages, 20 figuresNuclear Experimenttext