Updates

LHC restart update

After a shutdown lasting two years, the Large Hadron Collider (LHC), the world’s biggest and most powerful particle accelerator, is ready once again for the arrival of particle beams. The teams are completing the final tests after having solved on 31 March the problem that had been delaying the restart of the accelerator. The first beams could be circulating in the machine sometime between Saturday and Monday.

LHC restart update

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.

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