Title :
Application of Nb/sub 3/Sn superconductors in high-field accelerator magnets
Author :
den Ouden, A. ; Wessel, S. ; Krooshoop, E. ; ten Kate, H.
Author_Institution :
Low Temp. Div., Twente Univ., Enschede, Netherlands
fDate :
6/1/1997 12:00:00 AM
Abstract :
Last year a record central field of 11 T at first excitation at 4.4 K has been achieved with the experimental LHC model dipole magnet MSUT by utilising a high J/sub c/ powder-in-tube Nb/sub 3/Sn conductor. This is the first real breakthrough towards fields well above 10 T at 4 K. The clear influence of magnetisation and coupling currents on the field quality, the quench behaviour and the temperature development in the coils has been measured and is discussed. For application in high-field accelerator magnets (10-15 T dipoles, 300-400 T/m quadrupoles) these experimental results clearly reveal the potential, the present limitations and the necessary improvements of Nb/sub 3/Sn technology with respect to strand, cable and coil design and manufacturing. A brief review of developments in this field is presented. The focus is on accelerator dipole magnets but the key issues for quadrupole magnets are quite similar.
Keywords :
accelerator magnets; colliding beam accelerators; niobium alloys; proton accelerators; superconducting cables; superconducting coils; superconducting magnets; synchrotrons; tin alloys; type II superconductors; 10 T; 10 to 15 T; 11 T; 4 K; 4.4 K; LHC model dipole magnet; Large Hadron Collider; MSUT; Nb/sub 3/Sn; Nb/sub 3/Sn superconductors; cable design; central field; coupling currents; field quality; high-field accelerator magnets; magnetisation; quadrupoles; quench behaviour; strand design; superconducting coils; temperature development; Accelerator magnets; Coils; Conductors; Couplings; Current measurement; Large Hadron Collider; Magnetization; Niobium; Temperature; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on