On Tuesday 3 November, a bird carrying a baguette bread caused a short circuit in an electrical outdoor installation that serves sectors 7-8 and 8-1 of the LHC. The knock-on effects included an interruption to theoperation of the LHC cryogenics system. The bird escaped unharmed but lost its bread.
The standard failsafe systems came into operation and after the cause was identified, re-cooling of the machine began and the sectors were back at operating temperature last night. The incident was similar in effect to a standard power cut, for which the machine protection systems are very well prepared.
I have a lot of questions about this.
My guess is it was a French Bird.