CERN, THE ALICE COLLABORATION / SCIENCE PHOTO LIBRARY CERN, THE ALICE COLLABORATION / SCIENCE PHOTO LIBRARY
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ALICE 13 TeV proton collisions. Graphic of the first test collisions of protons at an energy of 13 TeV, as recorded by the ALICE at CERN on 20 May 2015. ALICE (A Large Ion Collider Experiment) is a detector built around the Large Hadron Collider (LHC) at CERN (the European particle physics laboratory) near Geneva, Switzerland. The LHC, the world's largest and most powerful particle collider, began operating in 2008. For ALICE, beams of ions are accelerated to collide head-on. The collision energy creates new particles that will decay into other particles. These will be detected by the many detector layers around the central collision point. The LHC energies have allowed study of exotic material like quark-gluon plasma, a form of quark matter.
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