<P> The first beam was circulated through the collider on the morning of 10 September 2008 . CERN successfully fired the protons around the tunnel in stages , three kilometres at a time . The particles were fired in a clockwise direction into the accelerator and successfully steered around it at 10 : 28 local time . The LHC successfully completed its major test : after a series of trial runs , two white dots flashed on a computer screen showing the protons travelled the full length of the collider . It took less than one hour to guide the stream of particles around its inaugural circuit . CERN next successfully sent a beam of protons in an anticlockwise direction , taking slightly longer at one and a half hours due to a problem with the cryogenics , with the full circuit being completed at 14 : 59 . </P>
<P> The first beam was circulated through the collider on the morning of 10 September 2008 . CERN successfully fired the protons around the tunnel in stages , three kilometres at a time . The particles were fired in a clockwise direction into the accelerator and successfully steered around it at 10 : 28 local time . The LHC successfully completed its major test : after a series of trial runs , two white dots flashed on a computer screen showing the protons travelled the full length of the collider . It took less than one hour to guide the stream of particles around its inaugural circuit . CERN next successfully sent a beam of protons in an anticlockwise direction , taking slightly longer at one and a half hours due to a problem with the cryogenics , with the full circuit being completed at 14 : 59 . </P>
when was the large hadron collider first turned on
when was the large hadron collider first turned on
10 September 2008
10 September 2008