the lhc was first used on september 10, 2008, but it did not work because a cooling system broke. the magnets that help to move the charged particles must be cold. the failure caused part of the facility to collapse. the lab shut down for the winter and the collider was not used again until november 2009. while it was being repaired, scientists used the tevatron to look for the higgs boson. when the lhc was restarted in november 2009, it set a new speed record by accelerating protons to 1.18 tev (teraelectronvolt, or trillion electronvolt). on march 30 2010, the lhc created a collision at 3.5 tev.