 In the early 1960s, it also constructed in Frascati the first ever electron-positron collider (ADA - "Anello Di Accumulazione"), under the scientific leadership of Bruno Touschek.In 1968, Frascati began operating ADONE ("big" AdA), which was the first high-energy particle collider, having a beam energy of 1.5 GeV.During the same period, the INFN began to participate in research into the construction and use of ever-more powerful accelerators being conducted at CERN.