The Large Hadron Collider is the largest and most complex scientific instrument ever built and the highest energy particle accelerator in the world.
The accelerator is located 100 m underground and runs through both French and Swiss territory. (27km circumference)
Latest: Geneva, 20 September 2008. During commissioning (without beam) of the final LHC sector (sector 34) at high current for operation at 5 TeV, an incident occurred at mid-day on Friday 19 September resulting in a large helium leak into the tunnel. Preliminary investigations indicate that the m
ost likely cause of the problem was a faulty electrical connection between two magnets, which probably melted at high current leading to mechanical failure. CERN s strict safety regulations ensured that at no time was there any risk to people. A full investigation is underway, but it is already cle
ar that the sector will have to be warmed up for repairs to take place. This implies a minimum of two months down time for LHC operation. For the same fault, not uncommon in a normally conducting machine, the repair time would be a matter of days. CERN press release Offical site http://www.cern.d
e/ Latest news about the LHC including this video can be seen at: http://www.telegraph.co.uk/earth/main.jhtml?menuId=6370 &menuItemId=10403&view=PICHEADLINESUMMARY2&grid=F7&targetRule=12
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