The LHC: A stronger machine
In early 2013, after three years of running, the Large Hadron Collider (LHC) shut down for planned maintenance. Hundreds of engineers and technicians spent about two years consolidating and strengthening the accelerator in preparation for running at the higher collision energy of 13 TeV, nearly double the collision energy of the LHC's first run. In this video, CERN managers, engineers and operational staff describe this huge engineering effort.
Provided by CERN