PETRA stored its first beam on 15 July

, 6 months ahead of schedule. Gustav-Adolf Voss,project leader, is surrounded by team members celebrating in traditional fashion. Shortly after, a 3-mA beam of electrons was accumulated for two hours and 5-GeV electron-positron collisions were produced at low intensity. By mid-September, the PLUTO detector from DORIS is to be moved into the PETRA beam, and experiments with some luminosity are to begin at 5 GeV in each beam.