Title :
Cryogenfree high field superconducting magnets
Author :
Watanabe, K. ; Motokawa, M.
Author_Institution :
Inst. for Mater. Res., Tohoku Univ., Sendai, Japan
fDate :
3/1/2000 12:00:00 AM
Abstract :
A cryogenfree superconducting magnet (CSM) has been realized using Bi-system high temperature superconducting current leads. Although conventional low temperature superconducting magnets wound with NbTi and Nb/sub 3/Sn wires are utilized, liquid helium is no longer required for a magnet operation. Up to now, various kinds of cryogenfree superconducting magnets such as a high field 15 T-CSM, a large bore 5 T-CSM with a 300 mm room temperature bore, and a unique high field X-ray diffraction apparatus combined with a split-pair 5 T-CSM have been successfully developed. Moreover, a split-pair CSM for neutron scattering and a high temperature operation CSM at 20 K employing Ag-sheathed Bi2223 tape have been demonstrated. It is expected that the further rapid progress in a cryogenfree superconducting magnet will be made and high field applications will be enlarged in the near future.
Keywords :
X-ray diffraction; bismuth compounds; calcium compounds; high-temperature superconductors; neutron diffraction; silver; strontium compounds; superconducting magnets; superconducting tapes; 15 T; 20 K; 293 K; 300 mm; 5 T; Ag-BiSrCaCuO; Ag-sheathed Bi2223 tape; cryogenfree high field superconductor magnets; high field X-ray diffraction apparatus; high temperature superconductor current leads; neutron scattering; room temperature bore; Boring; High temperature superconductors; Niobium compounds; Superconducting filaments and wires; Superconducting magnets; Tin; Titanium compounds; Wounds; X-ray diffraction;
Journal_Title :
Applied Superconductivity, IEEE Transactions on