CERN completes transition to lead-ion running at the Large Hadron Collider

Four days is all it took for the Large Hadron Collider (LHC) operations team at CERN to complete the transition from protons to lead ions in the LHC. After extracting the final proton beam of 2010 on Nov. 4, commissioning the lead-ion beam was underway by early afternoon. First collisions were recorded Nov. 7, and stable running conditions marked the start of physics with heavy ions on Nov. 8.

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