ICPEAC is a major biennial international meeting of physicists working in the broad area of collisions involving photons, electrons, ions, atoms, molecules, clusters, surfaces, and exotic particles. ICPEAC brings together about  800 participants from over 40 countries.

Some information about ICPEAC origins, past and future meetings, International Officers and Committees can be found on the ICPEAC Central website.

Check the "ICPEAC Timethreads" tapestry from the ICPEAC 2009 webpage for an at-a-glance overview of the ICPEAC history.