The LHC is preparing to restart at almost double the collision energy of its previous run. The new energy will allow physicists to check previously untestable theories, and explore new frontiers in particle physics. When the LHC is on, counter-rotating beams of particles will be made to collide at four interaction points 100 metres underground, around which sit the huge detectors ALICE, ATLAS, CMS and LHCb. In the video above, engineers and technicians prepare these four detectors to receive the

Follow the protons The accelerator complex at CERN is a succession of machines that accelerate particles to increasingly higher energies. Each machine boosts the energy of a beam of particles before injecting it into the next machine, with the last part of the complex being the #LHC. But what is so complex about the accelerator complex? Watch to follow the journey of the beams to the #LHC. Find out more: https://home.cern/news/news/accelerators/large-hadron-collider-reaches-its-first-stable-beam