Incidents in LHC ...forcing restart in 2009
Sorry for being late to update you about the incidents which occured within a week of the LHC's inauguration. As the superconducting magnet lost about a tonne of liquid helium into the tunnel. As a result massive Quenches occurred around sector 3- 4 . it happened when one of the superconducting magnet which was kept cooled down by liquid helium- leaked. This causeed rise of the temperature. It was bad because it may result an abrupt change of proton beam's paths..the amount of lost superfluid helium is said to be about 1% of the total amount used in LHC.. After this incident on 19th September, the LHC was forced to shut down. Investigation showed lately that a faulty electrical connection between 2 magnets was the cause of this. And for which the connection melted as of high current...“This incident was unforeseen,” said CERN Director GeneralRobert Aymar, “but I am now confident that we can make the necessary repairs, ensure that a similar incident can not happen in the future
