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Status report on the LHC main magnet production

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15 Author(s)
de Rijk, G. ; Accel. Technol. Dept., Geneva, Switzerland ; Bajko, M. ; Cornelis, M. ; Durante, M.
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The LHC ring will contain 1232 main dipole and 382 main quadrupole double aperture magnets. All main magnets are superconducting and employ Nb-Ti/Cu Rutherford type cables operated at 1.9 K. The dipole production has reached the equivalent of almost three octants of cold masses and nearly four octants of collared coils. The quadrupole production has reached 75 cold masses and over 150 bare magnets. The ramping up of large scale magnet production has posed several challenges which will be discussed, like: the coil size uniformity, coil pre-stress control, cold mass welding technique and the geometrical shape issues. The magnetic measurement results at warm will be presented together with their usage for the quality control in the production. The common features and differences of the three dipole producers will be discussed. The latest version of the production schedule will be presented.

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Applied Superconductivity, IEEE Transactions on  (Volume:15 ,  Issue: 2 )