Design and fabrication of a canted-cosine-theta double aperture orbit corrector dipole for the LHC

• Published in: IEEE transactions on applied superconductivity Vol. 33; no. 5; pp. 1 - 5
• Main Authors: Pepitone, K., Kirby, G., Olvegard, M., Ahl, A., Almstrom, M., Dugic, I., Emilsson, F., Haralanova, V., Johansson, M., Karlsson, G., Kennborn, B., Kovacikova, J., Lindstrom, J., Olsson, A., Pettersson, M., Ruber, R.
• Format: Journal Article
• Language: English
• Published: New York IEEE 2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: accelerator magnet; Apertures; Cable insulation; Canted-cosine-theta; Dipoles; Electrical insulation; Field strength; Luminosity; Machining; magnet design; Magnetic fields; Magnetomechanical effects; Magnets; Maskinteknik; Mechanical Engineering; quench protection; Radiation; Radiation dosage; Radiation tolerance; Solid modeling; Superconducting cables; Superconducting magnets; Wires
• ISSN: 1051-8223; 1558-2515; 1558-2515
• DOI: 10.1109/TASC.2023.3241571

A prototype CCT dipole magnet developed by a collaboration between Swedish universities, Swedish industry and CERN will be tested at Uppsala University. This 1 m long double-aperture magnet can provide a field strength of 3.3 T at 85 A in a 70 mm aperture with an integrated field of 2.8 Tm. It is intended to replace the current LHC orbit corrector magnets which are reaching the end of their expected life due to the radiation load. The new magnet is designed to handle the radiation dose of the upgrade to the high-luminosity LHC, which will deliver about ten times the current radiation dose. It must therefore be more resistant to radiation and meet strict requirements in terms of electrical insulation while matching the original field quality and self-protective capability, mechanical volume, and maximum excitation current. This paper will present the latest of the design and manufacturing work, including the results of simulations of the mechanical field and the mechanical stress. Details of the various tests performed before machining the parts are also presented.