Warm magnets for the LHC Project

by Willi Kalbreier (CERN)

Thursday 17 May 2001, 16:00 → 17:00 Europe/Zurich

SL Auditorium (CERN)

Warm (resistive) magnets, instead of s.c. one's, have been chosen for several applications in the LHC project either for economy reasons or for their high tolerance against energy deposition by high-energy particles. For the TI2 and TI8 injection lines, transferring 450 GeV/c protons from the SPS to the LHC, an evaluation of the total costs of construction and operation led to a clear advantage of warm magnets, as the lines will be used only during short periods per day for filling the LHC. For TI2 and TI8 360 main dipole, 180 main quadrupole and 98 correction dipole magnets are being built and a large number of other magnets has been recuperated from closed down installations. In total 45 steel septum magnets are built for the injection into and extraction from the LHC for the beam abort system. For the LHC main ring warm magnets have been selected in several regions only for their superior capability to accept high particle background. For the beam cleaning insertions IR3 and IR7 some 80 beam separation dipoles, quadrupoles and correction dipoles are needed. Around the LHC experiments some 30 separation and correction magnets will be installed, the latter to compensate for the effect of the huge spectrometer magnets on the circulating beam. Magnet design, fabrication and magnet field measurement issues are discussed.

Organiser(s): Werner Herr, SL Division

Note: Tea and coffee will be served at 15:30 in front of the Auditorium

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