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LHC particle accelerator magnets. Physicists testing a chain of superconducting magnets for the LHC (large hadron collider) at CERN (the European particle physics laboratory) near Geneva, Switzerland. The LHC is a 27-kilometre-long underground ring of superconducting magnets housed in a cooled pipe-like structure known as a cryostat. The magnets guide two counter-rotating proton beams. The beams are accelerated to an energy of 7 tera electron volts (TeV) and then brought to collide head on. Several detectors are being built around the LHC to detect the various subatomic particles produced by the collisions. A pilot run of the LHC is scheduled for summer 2007.
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