Yesterday, the teams working on the Large Hadron Collider (LHC) resolved the problem that had been delaying the restart of the accelerator. A few days ago, a short circuit to ground occurred in one of the connections between a magnet and its diode.
LHC run 2 is coming ever closer. Seven of the machine’s eight sectors have successfully been commissioned to the 2015 operating energy of 6.5 TeV per beam, and the eighth is not far behind. There will, however, be no circulating beam in the LHC this week. An intermittent short circuit to ground in one of the machine’s magnet circuits was identified on 21 March and is under investigation. It is a well understood issue, but one that could take time to resolve since it is in a cold section of the machine and repair may therefore require warming up and re-cooling after repair.