U.S. Scientists Celebrate the Restart of the Large Hadron Collider

After two years of upgrades and repairs, proton beams once again circulate around the Large Hadron Collider at CERN. Oak Ridge National Laboratory has led an 8-year upgrade of the electromagnetic calorimeter used for LHC's experiment called ALICE (for A Large Ion Collider Experiment). This detector measures the energies of high-energy electrons and gamma rays to learn more about the conditions of the early universe.

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