The Accelerator Technology division, forming together with Mechanical Technologies (MT), Proton Synchrotron (PS) and SPS+LEP (SL) divisions the Accelerator Sector (AC), came into being in 1990 as a result of the restructuring of CERN following the completion and commissioning of the LEP machine in the second half of 1989.
The AT division included all CERN activities in the fields of cryogenics, superconducting accelerating cavities, accelerator magnets and vacuum systems, and surveying. Other groups included the former LEP cooling and ventilation group and some support activities (database applications, software engineering, controls, laser for the CLIC project and so on). In their technological domains, the AT groups carried a CERN-wide responsibility for maintenance and operations support.
In December 1994 CERN's governing body, Council, officially approved the construction of CERN's Large Hadron Collider (LHC) - a technologically challenging superconducting ring, which will be installed in the existing LEP (Large Electron-Positron Collider) tunnel - to provide proton-proton collisions at energies 10 times greater than any previous machine.