Large Hadron Collider Experiment continues its second phase sets record by emiting photons

The Large Hadron Collider (LHC) reached a much-anticipated milestone today when it began smashing subatomic particles together at half its maximum power.
Earlier this month the "big bang machine" had broken its own energy record when it sent two 3.5-trillion-electron-volt (TeV) proton beams racing in opposite directions around the collider's 17-mile-long (27-kilometer-long) underground tunnel.
Today, at 1:06 p.m. local time in Geneva, Switzerland, LHC operators smashed those beams of protons together to create a record-shattering 7-TeV collision.
Reaching this point has been "marvelous," said David Evans, a physicist at the University of Birmingham in the U.K. and head of the LHC's ALICE detector project.