<P> The Large Hadron Collider ( LHC ) is the world 's largest and most powerful particle collider , the most complex experimental facility ever built , and the largest single machine in the world . It was built by the European Organization for Nuclear Research ( CERN ) between 1998 and 2008 in collaboration with over 10,000 scientists and engineers from over 100 countries , as well as hundreds of universities and laboratories . It lies in a tunnel 27 kilometres ( 17 mi ) in circumference , as deep as 175 metres ( 574 ft ) beneath the France -- Switzerland border near Geneva , Switzerland . Its first research run took place from March 2010 to early 2013 at an energy of 3.5 to 4 tera electronvolts ( TeV ) per beam ( 7 to 8 TeV total ) , about 4 times the previous world record for a collider . Afterwards , the accelerator was upgraded for two years . It was restarted in early 2015 for its second research run , reaching 6.5 TeV per beam ( 13 TeV total , the current world record ) . </P>
<P> The Large Hadron Collider ( LHC ) is the world 's largest and most powerful particle collider , the most complex experimental facility ever built , and the largest single machine in the world . It was built by the European Organization for Nuclear Research ( CERN ) between 1998 and 2008 in collaboration with over 10,000 scientists and engineers from over 100 countries , as well as hundreds of universities and laboratories . It lies in a tunnel 27 kilometres ( 17 mi ) in circumference , as deep as 175 metres ( 574 ft ) beneath the France -- Switzerland border near Geneva , Switzerland . Its first research run took place from March 2010 to early 2013 at an energy of 3.5 to 4 tera electronvolts ( TeV ) per beam ( 7 to 8 TeV total ) , about 4 times the previous world record for a collider . Afterwards , the accelerator was upgraded for two years . It was restarted in early 2015 for its second research run , reaching 6.5 TeV per beam ( 13 TeV total , the current world record ) . </P>
where is the cern large hadron collider located
where is the cern large hadron collider located
beneath the France -- Switzerland border near Geneva , Switzerland
beneath the France -- Switzerland border near Geneva , Switzerland