Stand-alone solid nitrogen cooled "permanent" high-temperature superconducting magnet system

• Published in: IEEE transactions on applied superconductivity Vol. 11; no. 1; pp. 2244 - 2247
• Main Authors: Haid, B., Lee, H., Iwasa, Y., Sang-Soo Oh, Hong-Soo Ha, Young-Kil Kwon, Kang-Sik Ryu
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.03.2001; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Coiling; Electrical engineering. Electrical power engineering; Electromagnets; Exact sciences and technology; High temperature superconductors; Magnetic switching; Nitrogen; Preliminary designs; Silver; Solid nitrogen; Solids; Superconducting coils; Superconducting films; Superconducting magnets; Superconducting tapes; Superconductivity; Switches; Temperature distribution; Various equipment and components; Wounds
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/77.920306

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.