1990 - 1995
The AT division included all CERN activities in the fields of cryogenics, superconducting accelerating cavities, accelerator magnets and vacuum systems, and surveying. These branches of technologies are all closely related with the programme for a gradual increase of the LEP beam energies and with the development programme on superconducting magnets for the hadron collider in the LEP Tunnel

 1996 - 2002
In 1996, the Large Hadron Collider Division (LHC) was created mainly from the AT Division with the aim of concentrating on the core activities for the LHC machine: superconducting magnets, cryogenics, and vacuum. For CERN-wide efficiency, the division kept responsibility for the operation and development of the cryognic and vacuum systems of all CERN accelerators and experiments. It also includes the small application group which studies the use of accelerators for energy production.