Title :
Development of Bi-2223 HTS high field coils and magnets
Author :
Haldar, P. ; Hoehn, J.G., Jr. ; Iwasa, Y. ; Lim, H. ; Yunus, M.
Author_Institution :
Intermagnetics Gen. Corp., Latham, NY, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
The powder-in-tube approach was successfully used to fabricate silver clad Bi-2223 in >100 m lengths of mono and >800 m lengths of multifilament tape. The tapes were wound into pancake and layer coils using the ´wind and react´ as well as the ´react and wind´ technique. The coils and magnets were characterized in the Hybrid III magnet and in a cryocooler at the FBNML, MIT. A ´wind and react´ magnet generated a maximum self field of 2.6 T, at liquid helium (4.2 K), liquid neon (27 K) and liquid nitrogen (77 K) temperatures, respectively. A magnet generated over 1.0 T with a background field of 20 T at 4.2 K. A smaller magnet cooled to 20 K with a two-stage cryocooler has demonstrated 0.8 T in a 40 mm room temperature bore.<>
Keywords :
bismuth compounds; cryogenics; high-temperature superconductors; liquid helium; silver; superconducting coils; superconducting magnets; superconducting tapes; 0.36 to 2.6 T; 20 K; 20 T; 27 K; 4.2 K; 40 mm; 77 K; Bi-2223 HTS high field coils; Bi-2223 HTS high field magnets; Hybrid III magnet; background field; cryocooler; layer coils; liquid helium; liquid neon; liquid nitrogen; multifilament tape; pancake coils; powder-in-tube approach; react and wind technique; room temperature bore; silver clad Bi-2223; two-stage cryocooler; wind and react technique; Conducting materials; High temperature superconductors; MONOS devices; Magnetic properties; Multifilamentary superconductors; Silver; Superconducting coils; Superconducting magnets; Superconducting materials; Wounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
