Large Hadron Collider at CERN - University of Edinburgh
Large Hadron Collider at CERN - University of Edinburgh
Large Hadron Collider at CERN - University of Edinburgh
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LHC Oper<strong>at</strong>ion• Proton beams are injected from the SPS <strong>at</strong> 400GeVand then acceler<strong>at</strong>ed to 7TeV. This is known as a “fill”.• The lifetime <strong>of</strong> the stored beams is ~10 hours.• There will eventually be 2808 bunches <strong>of</strong> protons ineach direction. Each bunch contains 10 11 protons andtravels round the ring in 0.9ms.• The bunch spacing is ~7m or 25ns, the bunch length is7.5cm, and the crossing r<strong>at</strong>e is 40MHz <strong>at</strong> each <strong>of</strong> thefour interaction points (ATLAS, CMS, LHCb, ALICE).• At full luminosity (10 34 /cm 2 /s) there will be severalinteractions during each bunch crossing.• The expected d<strong>at</strong>a r<strong>at</strong>e is 100MB/s per experiment or~10 PetaBytes/year!17.03.2010 St<strong>at</strong>us <strong>of</strong> the LHC - Steve Playfer7
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