GENEVA (AN) — The world's biggest and most powerful atom smasher is once again circulating beams of protons to allow for maintenance, consolidation and upgrades, the European Organization for Nuclear Research said on Friday.
After a shutdown of more than three years, the Large Hadron Collider restarted in the early afternoon with two beams containing a relatively small number of protons circulating in opposite directions around its 27-kilometer ring at their injection energy of 450 billion electronvolts (450 GeV), CERN reported.
