  The increase of energy in accelerators over the past decades has led to the
design of superconducting magnets for both accelerators and the associated
detectors. The use of Nb-Ti superconducting materials allows an increase in the
dipole field by up to 10 T compared with the maximum field of 2 T in a
conventional magnet. The field bending of the particles in the detectors and
generated by the magnets can also be increased. New materials, such as Nb3Sn
and high temperature superconductor (HTS) conductors, can open the way to
higher fields, in the range 13-20 T. The latest generations of fusion machines
producing hot plasma also use large superconducting magnet systems.
