Title :
Magnetic shielding and trapping properties of BPSCCO superconducting tubes
Author :
Plechacek, V. ; Hejtmanek, J. ; Sedmidubsky, D. ; Knizek, K. ; Pollert, E. ; Janu, Z. ; Tichy, R.
Author_Institution :
Inst. of Phys. ASCR, Praha, Czech Republic
fDate :
6/1/1995 12:00:00 AM
Abstract :
Tubular superconducting magnetic shields were prepared from the (Bi,Pb)/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10+x/ superconductor. A single tube of wall thickness of only 1.8 mm traps magnetic flux density of 30 mT at the temperature T=77.3 K and 60 mT at 63.2 K, while for a coaxial system of five tubes of overall thickness 9.6 mm, it increases to 70 mT at 77.3 K. A shielding factor as high as 5/spl times/10/sup 6/ was found for the superconducting tube of inner diameter d=22 mm and length and inner diameter ratio l/d=4.6.<>
Keywords :
bismuth compounds; calcium compounds; copper compounds; high-temperature superconductors; lead compounds; magnetic flux; magnetic shielding; magnetic traps; strontium compounds; superconducting devices; (Bi,Pb)/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10+x/ superconducting tubes; 1.8 mm; 22 mm; 30 mT; 60 mT; 63.2 K; 70 mT; 77.3 K; 9.6 mm; BiSrCaCuO; PbSrCaCuO; magnetic flux density; magnetic shields; shielding factor; trapping properties; wall thickness; Coaxial components; Density measurement; High temperature superconductors; Magnetic flux; Magnetic flux density; Magnetic properties; Magnetic shielding; Physics; Superconducting magnets; Superconducting materials;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
