The Large Hadron Collider is to close for a year to repair mistakes made in construction.
It is the latest in a series of setbacks to hit the atom smasher that scientists hope will re-create the Big Bang and pinpoint the Higgs boson, the so-called ”God particle”.
Scientists have discovered that copper connectors are unlikely to handle the maximum output and so will close the machine at the end of 2011 to fix the connectors.
In the meantime they will run the $A8.16 billion accelerator at half power.
Dr Steve Myers, a director of the European Organisation for Nuclear Research, which built the collider, said: ”We are pushing technologies towards their limits.”