Source: wikibot/opal-experiment

= OPAL experiment
{wiki=OPAL_experiment}

The OPAL (Omni Purpose Apparatus for LEP) experiment was a particle physics experiment located at the Large Electron-Positron collider (LEP) at CERN, which operated from 1989 to 2000. OPAL was one of four collaborations at LEP, the others being ALEPH, DELPHI, and L3.