Ireland used to participate in bubble-chamber experiments, and subsequently focused on cosmic-ray physics. However, an experimental Particle Physics group was established at the University College Dublin (UCD) in 2002 and UCD has been accepted in both LHCb and CMS experiments. There is also a theoretical physics group at Trinity College Dublin. Furthermore, Ireland is involved in the ACE and ISOLDE experiments at CERN.
Ireland has a strong interest in Grid technology. The Grid-Ireland Operations Centre at Trinity College Dublin is contributing to the data storage and processing for the ATLAS and LHCb experiments.