Abstract :
CERN is preparing the construction of a new particle accelerator-collider the Large Hadron Collider (LHC), which will be installed in the existing 27 km tunnel of the Large Electron-Positron Collider (LEP). The LHC will require in total about 10,000 superconducting magnetic units, including main magnets and correction elements. For the regular arcs of the machine 1300, 13.5 m long dipole magnets of 8.65T and 600, 3.2 m long quadrupoles of 220 T/m gradient will be used. These main magnets will all be of the twin-aperture configuration, i.e. with the magnetic channels for the two beams placed in a common yoke and cryostat. R&D for the LHC high field magnets is now approaching its goals. The last short dipole model reached the record field of 10.51 T and after thermal cycling had all quenches well above the LHC required field. A 10 m long prototype confirmed the validity of two major technical choices by behaving perfectly in superfluid helium and showing no adverse effects of the twin-aperture configuration. Fabrication in industry of seven full size dipoles is well advanced and two prototype quadrupoles are completed and ready for testing
Keywords :
proton accelerators; storage rings; superconducting magnets; synchrotrons; He; Large Hadron Collider magnet development; correction elements; magnetic channels; main magnets; particle accelerator-collider; superconducting magnetic units; superfluid He; thermal cycling; twin-aperture configuration; Fabrication; Helium; Large Hadron Collider; Linear particle accelerator; Prototypes; Structural beams; Superconducting magnets; Testing; Textile industry; Thermal quenching;
