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15 T Cryocooled Nb 3 Sn Superconducting Magnet with a 52 mm Room Temperature Bore

1998; Institute of Physics; Volume: 37; Issue: 10A Linguagem: Inglês

10.1143/jjap.37.l1148

1347-4065

Kazuo Watanabe, Satoshi Awaji, M. Motokawa, Yukio Mikami, J. Sakuraba, K. Watazawa,

Physics of Superconductivity and Magnetism

We succeeded in demonstrating a 15.1 T cryocooled Nb 3 Sn superconducting magnet with a 52 mm room temperature bore. Two operating currents of 157 A and 90 A for the divided section coils were utilized for the first time in a cryocooled superconducting magnet system. It is found that the current leads are no longer the dominant heat loads because of the use of high-temperature superconductors. In order to realize a high-field cryocooled superconducting magnet comparable to the usual superconducting magnet immersed in liquid helium at 4.2 K, we maintained the coil temperature at a value below 5.0 K during the field sweep in a high magnetic field region.