Title :
A cryocooler-cooled 19 T superconducting magnet with 52 mm room temperature bore
Author :
Kurusu, T. ; Ono, M. ; Hanai, S. ; Kyoto, M. ; Takigami, H. ; Takano, H. ; Watanabe, K. ; Awaji, S. ; Koyama, K. ; Nishijima, G. ; Togano, K.
Author_Institution :
Toshiba Corp., Yokohama, Japan
fDate :
6/1/2004 12:00:00 AM
Abstract :
This paper describes a design of a cryocooler-cooled 19 T superconducting magnet. The technical features of the magnet are a Bi2223 insert coil composed of 25 double pancake coils, Nb3Sn coils using a Nb3Sn wire reinforced with Nb-Ti-Cu compound, and a cooling structure using two types of cryocoolers. Coil protection from quenching was confirmed by numerical analysis. A preliminary experiment was carried out in order to investigate the influence of the bending strain upon a maximum permissible hoop stress of Ag-sheathed Bi2223 tape conductor.
Keywords :
bending strength; magnetic cooling; magnetic fields; stress effects; superconducting coils; superconducting magnets; 19 T; 52 mm; Ag; Bi2223 insert coil; Bi2223 tape conductor; Nb-Ti-Cu; Nb3Sn; bending strain; coil protection; cooling structure; cryocoolers; numerical analysis; pancake coils; permissible hoop stress; quenching; superconducting magnet; Boring; Cooling; Niobium; Numerical analysis; Protection; Superconducting coils; Superconducting magnets; Temperature; Tin; Wire; Bi222; coil; cryocooler-cooled superconducting magnet; hboxSn$ coil; high magnetic field; reinforced $hboxNb_;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.829679
