Division of accelerators, cryogenics and magnetism

  Magnet developments at TML will be overviewed. TML has a history for major achievements in the development of high-field superconducting magnets. In 1976, the first high-field superconducting magnet at TML generated a field of 17.5 T in a 32 mm cold bore using Nb3Sn and V3Ga tape conductors. This set the world record for superconducting magnets at that time, a position that the magnet retained for ten years. A second TML magnet broke the record by generating 18.1 T with a combination of NbTi, (Nb,Ti)3Sn, and V3Ga conductors in 1986, and a 21 T superconducting magnet, generating 18 T in a 160 mm cold bore, held the record from 1993. In 1999, a field of 23.4 T, currently the world record for superconducting magnets, was generated by inserting two Bi-2212 double-pancake coils in the bore. TML has also developed pulsed magnets and resistive magnets. A field of 37.9 T was generated using a hybrid magnet system.