Division of accelerators, cryogenics and magnetism

The author had contributed the development of the 18-T cryogen-free superconducting magnet and high-strength Nb3Sn superconducting wires in High Field Lab., Tohoku University. The 18-T cryogen-free superconducting magnet consists of NbTi, Nb3Sn, and Bi2223 coils. The most important keyword of the development is ‘high-strength.’ The Bi2223 coil was fabricated by a stainless steel co-winding technique. CuNi-NbTi reinforced Nb3Sn wire was employed for Nb3Sn coil to overcome the huge electromagnetic hoop stress of 234 MPa. Some topics of high-strength Nb3Sn wires and a future upgrade plan of the 18-T cryogen-free superconducting magnet will be introduced.

NB. Etant donnée la présentation de résultats non publiés au cours de ce séminaire, Gen NISHIJIMA a préféré que le support 'Power Point' ne soit mis en ligne sur l'intranet Irfu.