Status of the Large Hadron Collider magnet development

Abstract

13th Intemational Conference on Magnet Technology (MT13), Victoria, Canada, and ready for testing.seven full size dipoles is well advanced and two prototype quadrupoles are completed showing no adverse effects of the twin-aperture configuration. Fabrication in industry of validity of two major technical choices by behaving perfectly in superfluid helium and quenches well above the LHC required field. A 10 m long prototype confirmed the dipole model reached the record field of 10.51 T and after thermal cycling had all R & D for the LHC high field magnets is now approaching its goals. The last short the two beams placed in a common yoke and cryostat. magnets will all be of the twin-aperture configuration, i.e. with the magnetic channels for 8.65T and 600, 3.2 m long quadrupoles of 220 T/m gradient will be used. These main elements. For the regular arcs of the machine 1300, 13.5 m long dipole magnets of 10'000 superconducting magnetic units, including main magnets and correction Large Electron-Positron Collider (LEP). The LHC will require in total about Hadron Collider (LHC), which will be installed in the existing 27 km tunnel of the CERN is preparing the construction of a new particle accelerator-collider, the Large collider components.of the main dipoles is now 8.65 T for a proton beam energy installed in the 27 km long LEP tunnel, above the LEP units extended from 9 m to 13.145 m. The operational field advanced technology superconducting magnets which will be Q1 50 mm to ¤ 56 mm and the magnetic length of the dipoleThe new machine will mainly consist of a double ring of teristics [5]. The coil aperture has been increased from (LEP) at up to 1.3 TeV centre-of-mass energy. cost has recently led to some changes in the magnet charac with the elecuons of the Large Electron Posiuon Collider points of view of beam stability, operational reliability and will be a unique possibility of colliding high energy protons together with a re-optimization of the machine from the A review of the requirements of the physics experiments with 8 1umm¤sny ot 1.8 X 1027 cm·2 $-1. in addition, there training.centre-of-mass collision energy will be up to about 1150 TeV construction to prevent premature quenches and limit Heavier ions can also be collided; e.g. for lead (Pb) ions the and requires extreme care in the force-retaining mechanical will reach 14 TeV with a luminosity of 10cms 34 "2 '] conductors, such as those originating from sudden motion, planned facilities. For protons the head-on collision energy larly sensitive to quasi-adiabatic heat development in the luminosity higher than that attained in other existing or stored electromagnetic energy, makes the magnets particu collide at higher energies than ever achieved before and with bined with the high forces, proportional to BL, and the high gated with a short dipole model under construction [7], but with the magnetic channels for the two beams placed in a was successfully built and tested [6], is still being investi main magnem will all be of the twin-aperture configuratio...