The CERN Hadron Linacs are linear accelerators that accelerate beams of hadrons from a standstill to be used by the larger circular accelerators at the facility.
Internal view of the first CERN Linac
The first CERN Linac, operating from 1958 until 1992
Linac 2, operating from 1978 to 2018, was used to accelerate protons
Linac 3, currently (as of 2020) used to accelerate ions
The Proton Synchrotron Booster is the first and smallest circular proton accelerator in the accelerator chain at the CERN injection complex, which also provides beams to the Large Hadron Collider. It
CERN Hadron Linacs
…current of 70 mA at pulse lengths of 100 μs could be reached. From 1972 on, the Linac didn't deliver the protons directly to the PS anymore, but to the Proton Synchrotron Booster (PSB). The PSB had been built to allow for higher energies of the protons beams already before they enter the PS. After Linac 2 had taken over the task…
Injection and transfer lines of the Proton Synchrotron Booster
The surface above the PS Booster at CERN. The ring-shaped accelerator is visible as a circular building that rises from the ground.
The Proton Synchrotron Booster in its tunnel