Title :
Stand-alone solid nitrogen cooled “permanent” high-temperature superconducting magnet system
Author :
Haid, Benjamin ; Lee, Haigun ; Iwasa, Yukikazu ; Oh, Sang-Soo ; Ha, Hong-Soo ; Kwon, Young-Kil ; Ryu, Kang-Sik
Author_Institution :
Francis Bitter Nat. Magnet Lab., MIT, Cambridge, MA, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
This paper describes a stand-alone solid nitrogen cooled “permanent” high-temperature superconducting magnet system and presents its performance data. The system´s cold body includes the magnet, shunted with a superconducting switch and comprised of six double pancakes, each wound with BSCCO-2223/Ag composite tape, and a volume of solid nitrogen and operates within a cyclic temperature range between 20 K and 40 K. At an operating current of 50 A the coil generates a central field of 0.5 T in a 12-mm diameter room temperature bore; the system´s 2 liters of solid nitrogen is intended to give a cyclic operating period, from 20 K to 40 K, of about 70 hours. Included also in the paper is a preliminary design code that includes magnetic and thermal requirements of the system
Keywords :
bismuth compounds; calcium compounds; copper compounds; high-temperature superconductors; lead compounds; silver; strontium compounds; superconducting coils; superconducting magnets; superconducting tapes; (BiPb)2Sr2Ca2Cu3O 8-Ag; 0.5 T; 12 mm; 20 to 40 K; 50 A; 70 h; BSCCO-2223/Ag composite tape; cyclic operating period; cyclic temperature range; double pancakes; magnetic requirements; operating current; preliminary design code; solid nitrogen cooling; stand-alone permanent high-temperature superconducting magnet system; superconducting switch; thermal requirements; High temperature superconductors; Magnetic switching; Nitrogen; Solids; Superconducting coils; Superconducting films; Superconducting magnets; Switches; Temperature distribution; Wounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
